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Step-by-step practice: Maths · Level 5Chapter 9 · Perimeter of rectilinear shapes, time and money problems
Level 5 · Chapter 9

Perimeter of rectilinear shapes, time and money problems

By the end of this chapter you will be able to

  • Find the perimeter of a rectilinear shape, working out missing sides
  • Convert between hours, minutes and seconds
  • Find a time or a duration across an hour or a day change
  • Solve money problems with pounds and pence
  • Choose the operation for a problem and explain the choice

You should already know

  • Metric length and mass (chapter 8)
  • Adding and subtracting money in pounds and pence (chapter 7)
  • Time to the minute (Level 4, chapter 8)

Where this leads

  • Area and perimeter of more shapes (a later level)
  • Time in days, weeks, months and years (a later level)

Step-by-step practice: maths (Level 5). Small steps, repeated until fluent. Content: Measure and calculate the perimeter of composite rectilinear shapes in centimetres (Y5 paraphrase), Convert hours to minutes and minutes to seconds (Y5 paraphrase; hours, minutes and seconds only), Solve time problems across a change of hour or day (Y4 and Y5 paraphrase), Solve money problems in pounds and pence, including two-step problems with four operations (Y5 paraphrase).

Exercise P  Do you remember?

Non-calculator
1
FWhat is 4 × 7?
2
FChange 2 m to centimetres.
3
FWhat is 5.5 + 0.3?
4
FWork out 3,000 - 1,250.
5
FWhich is greater: 0.45 or 0.5?
9.1

Perimeter of rectilinear shapes

Level 5
Find the perimeter of a rectilinear shape, using the lengths of the sides, Find a missing side from the sides given
Video lesson: Perimeter of rectilinear shapesComing soon

A rectilinear shape has only right-angled corners. The perimeter is the distance all the way round, so add every side.

Some sides are not given. Work them out first: a missing side is a longer side take away a shorter part.

Key ideas

  • Perimeter = the sum of all the sides.
  • Find each missing side by subtraction first.
  • A rectangle: 2 × (length + width).
Worked example 9.1.1
Find the perimeter of the shape. The sides marked ? are not given, so work them out first.
4 cm??3 cm10 cm8 cm

Method. Work out each missing side, then add all the sides of the shape.

  1. Find the missing sides. Missing sides come from the sides that are given: take away the shorter part.
    step = 10 - 4 = 6 cm; right side = 8 - 3 = 5 cm
  2. List all six sides. The perimeter is the distance all the way round.
    4 + 5 + 6 + 3 + 10 + 8 cm
  3. Add the sides. Add all the lengths together.
    36 cm
  4. Write the perimeter. Give the answer with the unit cm.
    36 cm

Check. Check: the perimeter of a shape like this is twice the width plus twice the height: 2 × (10 + 8) = 36 cm.

Watch out. Do not add only the sides you can see. Every side counts, including the ones you worked out.

Worked example 9.1.2
Find the perimeter of the shape. The sides marked ? are not given, so work them out first.
5 cm??2 cm9 cm7 cm

Method. Work out each missing side, then add all the sides of the shape.

  1. Find the missing sides. Missing sides come from the sides that are given: take away the shorter part.
    step = 9 - 5 = 4 cm; right side = 7 - 2 = 5 cm
  2. List all six sides. The perimeter is the distance all the way round.
    5 + 5 + 4 + 2 + 9 + 7 cm
  3. Add the sides. Add all the lengths together.
    32 cm
  4. Write the perimeter. Give the answer with the unit cm.
    32 cm

Check. Check: the perimeter of a shape like this is twice the width plus twice the height: 2 × (9 + 7) = 32 cm.

Watch out. Do not add only the sides you can see. Every side counts, including the ones you worked out.

Worked example 9.1.3
A rectangle is 7 cm long and 4 cm wide. What is its perimeter?

Method. Add one length and one width, then double the answer.

  1. Add the length and the width. One long side and one short side.
    7 + 4 = 11 cm
  2. Double the answer. A rectangle has two lengths and two widths.
    2 × 11 = 22 cm
  3. Write the perimeter. Give the unit cm.
    22 cm

Check. Check: 7 + 4 + 7 + 4 = 22 cm.

Watch out. Count all four sides. Do not forget the two sides you have not added yet.

Watch out

Watch out. Do not leave out a side. An L-shape has six sides, not four.

Exam tip

Grown-up tip. Ask the child to trace the shape with a finger, saying each side aloud, before adding.

Exercise 9A  Practice: perimeter

Non-calculator
1
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
6 cm??5 cm9 cm7 cm
2
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
2 cm?5 cm2 cm7 cm5 cm
3
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
6 cm??5 cm12 cm8 cm
4
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
2 cm?8 cm2 cm10 cm4 cm
5
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
6 cm??4 cm9 cm6 cm
6
FA rectangle is 15 cm long and 6 cm wide. What is its perimeter?
7
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
6 cm?6 cm5 cm12 cm7 cm
8
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
8 cm??6 cm12 cm9 cm
9
FA rectangle is 14 cm long and 8 cm wide. What is its perimeter?
10
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
4 cm?5 cm6 cm9 cm8 cm
11
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
2 cm4 cm?2 cm5 cm6 cm
12
FA rectangle is 12 cm long and 9 cm wide. What is its perimeter?
13
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.
5 cm??3 cm7 cm6 cm
14
FA rectangle is 11 cm long and 5 cm wide. What is its perimeter?
15
FA rectangle is 15 cm long and 9 cm wide. What is its perimeter?
16
FA rectangle is 13 cm long and 6 cm wide. What is its perimeter?
9.2

Hours, minutes and seconds

Level 5
Convert hours to minutes, and minutes to hours and minutes, Convert minutes to seconds, and seconds to minutes
Video lesson: Hours, minutes and secondsComing soon

There are 60 minutes in 1 hour and 60 seconds in 1 minute. To change hours to minutes, multiply by 60.

To change minutes into hours and minutes, divide by 60. The remainder is the minutes left over: 95 minutes = 1 h 35 min.

Key ideas

  • 1 hour = 60 minutes; 1 minute = 60 seconds.
  • Hours to minutes: multiply by 60.
  • Minutes to hours: divide by 60; the remainder is minutes.
Worked example 9.2.1
Change 3 hours to minutes.

Method. Multiply the hours by 60 to change them into minutes.

  1. Use the rule. There are 60 minutes in 1 hour.
    1 h = 60 min
  2. Multiply the hours by 60. Each hour has 60 minutes.
    3 × 60 = 180
  3. Write the answer. The unit is minutes.
    180 minutes

Check. Check: 180 ÷ 60 = 3.

Watch out. Going from hours to minutes gives a bigger number. Multiply by 60.

Worked example 9.2.2
Change 95 minutes to hours and minutes.

Method. Divide by 60 to find the hours; the remainder is the minutes.

  1. Share the minutes into groups of 60. Each group of 60 minutes is one hour.
    95 ÷ 60 = 1 r 35
  2. Write the hours and the minutes left. The remainder is the minutes that are left over.
    1 h and 35 min
  3. Write the answer. Use the units hours and minutes.
    1 h 35 min

Check. Check: 1 × 60 + 35 = 95.

Watch out. Do not write 1 h 95 min. The minutes must be less than 60.

Worked example 9.2.3
Change 190 seconds to minutes and seconds.

Method. Divide by 60 to find the minutes; the remainder is the seconds.

  1. Share the seconds into groups of 60. Each group of 60 seconds is one minute.
    190 ÷ 60 = 3 r 10
  2. Write the minutes and the seconds left. The remainder is the seconds.
    3 min and 10 s
  3. Write the answer. Use the units minutes and seconds.
    3 min 10 s

Check. Check: 3 × 60 + 10 = 190.

Watch out. The seconds must be less than 60.

Watch out

Watch out. 95 minutes is 1 h 35 min, not 1 h 95 min. The minutes must be less than 60.

Exam tip

Grown-up tip. Use a clock face: ask how many minutes go round the clock in one hour.

Exercise 9B  Practice: hours, minutes and seconds

Non-calculator
1
FChange 6 minutes to seconds.
2
FChange 571 seconds to minutes and seconds.
3
FChange 7 hours to minutes.
4
FChange 537 seconds to minutes and seconds.
5
FChange 254 seconds to minutes and seconds.
6
FChange 4 hours to minutes.
7
FChange 236 minutes to hours and minutes.
8
FChange 312 seconds to minutes and seconds.
9
FChange 2 hours to minutes.
10
FChange 9 minutes to seconds.
11
FChange 484 seconds to minutes and seconds.
12
FChange 238 minutes to hours and minutes.
13
FChange 127 minutes to hours and minutes.
14
FChange 242 minutes to hours and minutes.
15
FChange 9 hours to minutes.
16
FChange 189 minutes to hours and minutes.
9.3

Durations across an hour or a day change

Level 5
Find the time taken for a journey across an hour, Find the time taken for a journey across midnight
Video lesson: Durations across an hour or a day changeComing soon

Count on from the start time. First count to the next hour, then the whole hours, then the minutes to the end time.

Across midnight, count to 24:00 first, then on from 00:00.

Key ideas

  • Count on, do not subtract the clock times.
  • Count to the next hour first.
  • Midnight is 24:00.
Worked example 9.3.1
A train leaves at 10:45 and arrives at 12:20. How long is the journey?

Method. Count on in steps from the start to the arrival time: first to the next hour, then whole hours, then minutes.

  1. Count the minutes to the next hour. Go from the start time to the next full hour.
    10:45 to 11:00 is 15 min
  2. Count the whole hours. Count each full hour after that.
    1 whole hours
  3. Count the minutes after the last whole hour. Count on to the arrival time.
    20 min
  4. Add the parts. Add all the parts for the total time.
    15 min + 1 h + 20 min = 1 h 35 min
  5. Write the answer. Give the journey time in hours and minutes.
    1 h 35 min

Check. Check: 1 h 35 min added to 10:45 gives 12:20.

Watch out. Do not subtract the times as if they were ordinary numbers. Count on across the hour.

Worked example 9.3.2
A bus leaves at 22:30 and arrives at 01:15 the next day. How long is the journey?

Method. Count to midnight, then count on from midnight to the arrival time.

  1. Count to midnight. Midnight is 24:00, the start of the next day.
    22:30 to 24:00 is 1 h 30 min
  2. Count on from midnight. Add the time after midnight.
    00:00 to 01:15 is 1 h 15 min
  3. Add the two parts. The journey crosses midnight, so we add the two parts.
    1 h 30 min + 1 h 15 min = 2 h 45 min
  4. Write the answer. Give the journey time in hours and minutes.
    2 h 45 min

Check. Check: 2 h 45 min is the same as 165 minutes.

Watch out. When a journey crosses midnight, the arrival time is smaller than the start time. Count across the day change.

Worked example 9.3.3
A train leaves at 17:20 and arrives at 19:50. How long is the journey?

Method. Count on in steps from the start to the arrival time: first to the next hour, then whole hours, then minutes.

  1. Count the minutes to the next hour. Go from the start time to the next full hour.
    17:20 to 18:00 is 40 min
  2. Count the whole hours. Count each full hour after that.
    1 whole hours
  3. Count the minutes after the last whole hour. Count on to the arrival time.
    50 min
  4. Add the parts. Add all the parts for the total time.
    40 min + 1 h + 50 min = 2 h 30 min
  5. Write the answer. Give the journey time in hours and minutes.
    2 h 30 min

Check. Check: 2 h 30 min added to 17:20 gives 19:50.

Watch out. Do not subtract the times as if they were ordinary numbers. Count on across the hour.

Watch out

Watch out. 10:45 to 12:20 is 1 h 35 min, not 1 h 25 min. Count across the hour carefully.

Exam tip

Grown-up tip. Use a clock or a timetable. Ask: “How long until the next hour? How long after it?”

Exercise 9C  Practice: durations across the hour and the day

Non-calculator
1
PSA train leaves at 08:53 and arrives at 10:36. How long is the journey?
2
PSA train leaves at 08:07 and arrives at 10:57. How long is the journey?
3
PSA train leaves at 13:29 and arrives at 17:38. How long is the journey?
4
PSA train leaves at 17:20 and arrives at 20:08. How long is the journey?
5
PSA train leaves at 20:08 and arrives at 23:34. How long is the journey?
6
PSA train leaves at 09:04 and arrives at 11:10. How long is the journey?
7
PSA train leaves at 16:37 and arrives at 19:33. How long is the journey?
8
PSA train leaves at 18:04 and arrives at 19:51. How long is the journey?
9
PSA train leaves at 18:53 and arrives at 23:00. How long is the journey?
10
PSA bus leaves at 22:31 and arrives at 02:14 the next day. How long is the journey?
11
PSA train leaves at 19:02 and arrives at 20:56. How long is the journey?
12
PSA train leaves at 15:31 and arrives at 16:23. How long is the journey?
13
PSA train leaves at 17:35 and arrives at 19:24. How long is the journey?
14
PSA bus leaves at 23:35 and arrives at 01:40 the next day. How long is the journey?
15
PSA bus leaves at 22:52 and arrives at 01:55 the next day. How long is the journey?
16
PSA train leaves at 18:16 and arrives at 22:53. How long is the journey?
9.4

Two-step money problems

Level 5
Add and subtract money in pounds and pence, in two-step problems
Video lesson: Two-step money problemsComing soon

Money in pounds and pence is worked out in the same way as decimals to hundredths. Line up the decimal points.

In a two-step problem, add the costs first, then take the total from the money at the start.

Key ideas

  • Line up the decimal points.
  • Work out the total cost first.
  • Keep two places for the pence.
Worked example 9.4.1
Sam has £10.00. He buys a book for £4.35 and a pen for £0.85. How much money is left?

Method. Add the costs, then subtract the total from the money at the start.

  1. Add the two costs. Add the pounds and the pence together.
    £4.35 + £0.85 = £5.20
  2. Take the total away from the money Sam has. Subtract the total cost.
    £10.00 - £5.20 = £4.80
  3. Write the answer. Give the amount left with the pound sign.
    £4.80

Check. Check: £4.80 + £5.20 = £10.00.

Watch out. Keep the pence in two places: £0.85 and £2.40, not £0.85 and £2.4.

Worked example 9.4.2
Ayo has £20.00. She spends £12.50 on lunch and £3.75 on a drink. How much does she have left?

Method. Add the costs, then subtract the total from the money at the start.

  1. Add the two costs. Add the pounds and the pence together.
    £12.50 + £3.75 = £16.25
  2. Take the total away from the money Sam has. Subtract the total cost.
    £20.00 - £16.25 = £3.75
  3. Write the answer. Give the amount left with the pound sign.
    £3.75

Check. Check: £3.75 + £16.25 = £20.00.

Watch out. Keep the pence in two places: £0.85 and £2.40, not £0.85 and £2.4.

Worked example 9.4.3
Sam buys 3 cups at £1.25 each and a cake for £2.40. He pays with £10.00. How much change should he get?

Method. Find the total of all the items, then take it from the money paid.

  1. Work out the cost of the cups. Multiply the price by the number of cups.
    3 × £1.25 = £3.75
  2. Add the cost of the cake. Add all the items to find the total.
    £3.75 + £2.40 = £6.15
  3. Work out the change. Change is what is left from the money paid.
    £10.00 - £6.15 = £3.85
  4. Write the answer. Give the change with the pound sign.
    £3.85

Check. Check: £6.15 + £3.85 = £10.00.

Watch out. Add all the items before you take anything away.

Watch out

Watch out. Do not subtract each cost one at a time from the wrong amount. Work out the total of the costs first.

Exam tip

Grown-up tip. Use real coins and notes. Ask the child to pay the total, then count the change back to the amount paid.

Exercise 9D  Practice: two-step money problems

Non-calculator
1
PSAyo has £19.35. She spends £5.43 on lunch and £0.76 on a drink. How much does she have left?
2
PSAyo has £16.09. She spends £1.70 on lunch and £0.98 on a drink. How much does she have left?
3
PSAyo has £14.51. She spends £1.87 on lunch and £2.43 on a drink. How much does she have left?
4
PSAyo has £10.40. She spends £3.52 on lunch and £1.18 on a drink. How much does she have left?
5
PSAyo has £14.03. She spends £1.42 on lunch and £1.39 on a drink. How much does she have left?
6
PSSam has £14.41. He buys a book for £2.05 and a pen for £1.54. How much money is left?
7
PSSam has £15.81. He buys a book for £3.80 and a pen for £0.59. How much money is left?
8
PSAyo has £11.93. She spends £2.88 on lunch and £2.61 on a drink. How much does she have left?
9
PSSam has £18.75. He buys a book for £2.48 and a pen for £2.28. How much money is left?
10
PSAyo has £15.02. She spends £4.88 on lunch and £1.74 on a drink. How much does she have left?
11
PSSam has £17.92. He buys a book for £5.16 and a pen for £2.18. How much money is left?
12
PSAyo has £12.90. She spends £3.74 on lunch and £0.81 on a drink. How much does she have left?
13
PSSam has £11.84. He buys a book for £5.69 and a pen for £2.89. How much money is left?
14
PSSam has £19.48. He buys a book for £4.47 and a pen for £0.72. How much money is left?
15
PSAyo has £14.32. She spends £1.23 on lunch and £2.49 on a drink. How much does she have left?
16
PSAyo has £14.66. She spends £1.40 on lunch and £0.69 on a drink. How much does she have left?
9.5

Change from a total, and choosing the operation

Level 5
Give change from a multi-item total, Choose the operation for a time or money problem, and explain the choice
Video lesson: Change from a total, and choosing the operationComing soon

To find the change, first find the total of all the items. Then take the total from the money paid.

Key words help you choose: spent and left mean take away; altogether and total mean add.

Key ideas

  • Find the total of all the items first.
  • Change = money paid − total.
  • Explain the operation with a reason from the story.
Worked example 9.5.1
Sam buys 3 cups at £1.25 each and a cake for £2.40. He pays with £10.00. How much change should he get?

Method. Find the total of all the items, then take it from the money paid.

  1. Work out the cost of the cups. Multiply the price by the number of cups.
    3 × £1.25 = £3.75
  2. Add the cost of the cake. Add all the items to find the total.
    £3.75 + £2.40 = £6.15
  3. Work out the change. Change is what is left from the money paid.
    £10.00 - £6.15 = £3.85
  4. Write the answer. Give the change with the pound sign.
    £3.85

Check. Check: £6.15 + £3.85 = £10.00.

Watch out. Add all the items before you take anything away.

Worked example 9.5.2
Sam has £15.00. He spends £3.50. Should you add or subtract to find how much he has left? Explain why.

Method. Choose the operation from what happens in the story, and say why.

  1. Read the story. Money is spent, so some of it goes away.
    £15.00 spent £3.50
  2. Choose the operation. When an amount goes away, we take it away.
    Subtract
  3. Give the reason. The money left is what is left after the spending.
    Accept any answer that says subtract and gives a reason, such as: the money is taken away

Check. Accept any answer that names the operation and gives a sensible reason, such as the one shown.

Watch out. Read the key words: spent, left, altogether, total, change, and each.

Worked example 9.5.3
Sam buys a pen for £12.00 and a ruler for £4.50. Should you add or subtract to find the total cost? Explain why.

Method. Choose the operation from what happens in the story, and say why.

  1. Read the story. Two costs are put together for a total.
    £12.00 and £4.50
  2. Choose the operation. When amounts are combined, we add them.
    Add
  3. Give the reason. The total is the sum of the amounts.
    Accept any answer that says add and gives a reason, such as: the costs are put together

Check. Accept any answer that names the operation and gives a sensible reason, such as the one shown.

Watch out. Read the key words: spent, left, altogether, total, change, and each.

Watch out

Watch out. Change is found by subtracting only after the total is worked out. Do not take one item away from the money paid.

Exam tip

Grown-up tip. Ask: “Is the money going away, or are we putting amounts together?” before the child calculates.

Exercise 9E  Practice: change and choosing the operation

Non-calculator
1
RSam buys a pen for £20.34 and a ruler for £7.97. Should you add or subtract to find the total cost? Explain why.
2
PSSam buys 3 cups at £1.31 each and a cake for £2.23. He pays with £10.00. How much change should he get?
3
RSam has £28.80. He spends £1.60. Should you add or subtract to find how much he has left? Explain why.
4
PSSam buys 3 cups at £1.65 each and a cake for £2.07. He pays with £15.00. How much change should he get?
5
PSSam buys 3 cups at £1.71 each and a cake for £2.59. He pays with £20.00. How much change should he get?
6
PSSam buys 2 cups at £1.76 each and a cake for £1.59. He pays with £20.00. How much change should he get?
7
PSSam buys 4 cups at £1.18 each and a cake for £1.43. He pays with £15.00. How much change should he get?
8
RSam has £28.09. He spends £2.94. Should you add or subtract to find how much he has left? Explain why.
9
PSSam buys 4 cups at £1.47 each and a cake for £1.41. He pays with £15.00. How much change should he get?
10
RSam buys a pen for £16.28 and a ruler for £5.17. Should you add or subtract to find the total cost? Explain why.
11
RSam has £25.76. He spends £2.91. Should you add or subtract to find how much he has left? Explain why.
12
RSam buys a pen for £26.57 and a ruler for £3.63. Should you add or subtract to find the total cost? Explain why.
13
PSSam buys 3 cups at £0.88 each and a cake for £1.29. He pays with £20.00. How much change should he get?
14
RSam has £23.67. He spends £5.93. Should you add or subtract to find how much he has left? Explain why.
15
PSSam buys 2 cups at £1.23 each and a cake for £2.25. He pays with £15.00. How much change should he get?
16
RSam has £13.88. He spends £3.50. Should you add or subtract to find how much he has left? Explain why.

Chapter summary

SkillMethod
PerimeterAdd all the sides; find missing sides by subtraction first
Hours and minutes1 h = 60 min; hours × 60; minutes ÷ 60, remainder is minutes
DurationsCount to the next hour, then whole hours, then minutes; across midnight, count to 24:00
MoneyLine up the points; total the costs first; keep two places for pence
Change and operationsChange = paid − total; choose the operation from the key words and explain

Can you…?

  • I can find the perimeter of a rectilinear shape, including missing sides
  • I can convert between hours, minutes and seconds
  • I can find a time or a duration across an hour or midnight
  • I can solve two-step money problems in pounds and pence
  • I can give change from a total, and choose and explain the operation

Key terms

rectilinear
a shape made only of straight sides with right angles
perimeter
the distance all the way round a shape
duration
how long something lasts
change
the money given back when you pay more than the cost

Exercise 9Z  Check-up

Non-calculator
1
Find the perimeter of the shape. The sides marked ? are not given, so work them out first.
2 cm??2 cm5 cm4 cm
2
Sam buys 4 cups at £0.88 each and a cake for £2.10. He pays with £10.00. How much change should he get?
3
A train leaves at 14:24 and arrives at 15:42. How long is the journey?
4
A train leaves at 17:20 and arrives at 21:50. How long is the journey?
5
Sam has £16.89. He buys a book for £4.89 and a pen for £0.81. How much money is left?
6
Ayo has £17.83. She spends £1.49 on lunch and £2.65 on a drink. How much does she have left?
7
Find the perimeter of the shape. The sides marked ? are not given, so work them out first.
3 cm?8 cm3 cm11 cm7 cm
8
Find the perimeter of the shape. The sides marked ? are not given, so work them out first.
6 cm?6 cm2 cm12 cm4 cm
9
Find the perimeter of the shape. The sides marked ? are not given, so work them out first.
6 cm?3 cm3 cm9 cm5 cm
10
Change 9 hours to minutes.

Total 19 marks. Allow about 19 minutes.

Exercise 9X  Practice test questions

Non-calculator
1
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.[1 mark]
2 cm??2 cm7 cm4 cm
2
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.[1 mark]
4 cm??4 cm12 cm8 cm
3
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.[1 mark]
4 cm??4 cm8 cm9 cm
4
PSFind the perimeter of the shape. The sides marked ? are not given, so work them out first.[1 mark]
2 cm?6 cm2 cm8 cm6 cm
5
FChange 96 minutes to hours and minutes.[2 marks]
6
FA rectangle is 9 cm long and 6 cm wide. What is its perimeter?[2 marks]
7
RSam buys a pen for £19.05 and a ruler for £8.48. Should you add or subtract to find the total cost? Explain why.[2 marks]
8
FChange 233 minutes to hours and minutes.[3 marks]
9
FA rectangle is 6 cm long and 4 cm wide. What is its perimeter?[3 marks]
10
RSam has £17.57. He spends £3.52. Should you add or subtract to find how much he has left? Explain why.[3 marks]
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