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Primary Maths · Year 5Chapter 5 · Division
Year 5 · Short Division and Remainders · Lesson 5.5

Year 5: What do we do with the remainder?

Part of the Year 5 short division and remainders chapter. Chapter overview · whole chapter on one page · Download worksheet (PDF) · Answers (PDF)

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5.5

What do we do with the remainder?

Year 5
Interpret remainders appropriately for the context, Round up, round down, or use the remainder, Remainders as fractions and decimals (introduced)

When one number does not divide exactly into another, there is a remainder. What you do with it depends on the story in the question. Think about 100 eggs put into boxes of 6. 100 ÷ 6 = 16 remainder 4: there are 16 full boxes and 4 eggs left over.

666· · ·6410016 groups of 6 and 4 left over
100 eggs make 16 full boxes of 6 and 4 left over (the orange piece).

There are four things you might do.

1. Round up. “How many boxes are needed for all the eggs?” The 4 left-over eggs still need a box, so we need 16 + 1 = 17 boxes. 2. Round down. “How many full boxes can she fill?” The 4 eggs cannot fill another box, so the answer is 16. 3. The remainder is the answer. “How many eggs are left over?” The answer is the remainder, 4. 4. Fractions and decimals. If you are sharing something that can be cut up, the remainder can be shared too. 7 pizzas shared between 2 children is 7 ÷ 2 = 3 remainder 1. The last pizza is cut in 2 halves, so each child gets 3 and a half: 3½ or 3.5.

If the question says…then…example
how many are needed / how many tripsround up100 eggs, boxes of 6: 17 boxes
how many full / how many can she buyround down100 eggs, boxes of 6: 16 full boxes
how many are left overuse the remainder100 eggs, boxes of 6: 4 left
share something that can be cutfraction or decimal7 ÷ 2 = 3 r 1 = 3½ = 3.5
Read the question: the key words tell you what to do.

Key ideas

  • A remainder is what is left over. It is always smaller than the divisor.
  • Round up when everything must be fitted in (how many boxes, buses or trips are needed).
  • Round down when only whole groups count (how many full boxes, how many can you buy).
  • The remainder itself is the answer when the question asks how many are left over.
  • A remainder can be written as a fraction (remainder over divisor) or as a decimal: 7 ÷ 2 = 3 r 1 = 3½ = 3.5.
Worked example 5.5.1
165 children are going on a trip. A minibus holds 8 children. How many minibuses are needed?

Key words. The remainder is what is left over after you divide. The quotient is the answer to a division. Whether you round the answer up, round it down or use the remainder depends on the question.

Method. Divide, then think about what the remainder means in the story. The answer might be rounded up, rounded down, or be the remainder itself.

  1. Draw a bar model. We split 165 into groups of 8. Some may be left over.
    888· · ·8516520 groups of 8 and 5 left over
  2. Choose the operation. We want to know how many groups of 8 fit into 165, so divide.
    165 ÷ 8
  3. Draw the bus stop. The number we are dividing goes inside. The number we divide by goes outside, on the left.
       
    8165
  4. Divide the hundreds. Always start on the left, with the biggest place value.
    1 ÷ 8: 1 is smaller than 8, so we cannot give each share a whole hundred. Write 0 (a 0 at the front is not part of the answer).
    Exchange the 1 hundred for 10 tens. Carry 1 to the next digit.
  5. Divide the tens. Move to the next digit on the right. Add the 1 that was carried.
    The carried 1 makes 10 tens. With the 6 tens there are 10 + 6 = 16 tens.
    16 ÷ 8: 2 × 8 = 16. Write 2 above the 6.
  6. Divide the ones. Move to the next digit on the right.
    Nothing was carried, so there are just 5 ones.
    5 ÷ 8: 5 is smaller than 8, so write 0.
    The remainder is 5.
  7. Read the answer. Ignore any 0 at the front of the answer.
    020r 5
    81165

    165 ÷ 8 = 20 r 5
  8. Say what the remainder means. 165 ÷ 8 = 20 remainder 5: that is 20 full minibuses and 5 children left over.
    20 full minibuses + 5 left over
  9. Decide what to do with the remainder. The 5 left over still need somewhere to go, so one more minibus is needed. We round the answer up.
    20 + 1 = 21
  10. Write the answer. Include the unit.
    21 minibuses

Check. 20 × 8 = 160 and 160 + 5 = 165. ✓

Watch out. Do not round down here. The 5 left over would have no minibus.

Worked example 5.5.2
There are 100 eggs. Each box holds 6 eggs. How many boxes are needed to hold all the eggs?

Key words. The remainder is what is left over after you divide. The quotient is the answer to a division. Whether you round the answer up, round it down or use the remainder depends on the question.

Method. Divide, then think about what the remainder means in the story. The answer might be rounded up, rounded down, or be the remainder itself.

  1. Draw a bar model. We split 100 into groups of 6. Some may be left over.
    666· · ·6410016 groups of 6 and 4 left over
  2. Choose the operation. We want to know how many groups of 6 fit into 100, so divide.
    100 ÷ 6
  3. Draw the bus stop. The number we are dividing goes inside. The number we divide by goes outside, on the left.
       
    6100
  4. Divide the hundreds. Always start on the left, with the biggest place value.
    1 ÷ 6: 1 is smaller than 6, so we cannot give each share a whole hundred. Write 0 (a 0 at the front is not part of the answer).
    Exchange the 1 hundred for 10 tens. Carry 1 to the next digit.
  5. Divide the tens. Move to the next digit on the right. Add the 1 that was carried.
    The carried 1 makes 10 tens. With the 0 tens there are 10 + 0 = 10 tens.
    10 ÷ 6: 1 × 6 = 6, and 10 − 6 = 4. Write 1 above the 0.
    Exchange: 4 tens become 40 ones. Carry 4 to the next digit.
  6. Divide the ones. Move to the next digit on the right. Add the 4 that was carried.
    The carried 4 makes 40 ones. With the 0 ones there are 40 + 0 = 40 ones.
    40 ÷ 6: 6 × 6 = 36, and 40 − 36 = 4. Write 6 above the 0.
    The remainder is 4.
  7. Read the answer. Ignore any 0 at the front of the answer.
    016r 4
    611040

    100 ÷ 6 = 16 r 4
  8. Say what the remainder means. 100 ÷ 6 = 16 remainder 4: that is 16 full boxes and 4 eggs left over.
    16 full boxes + 4 left over
  9. Decide what to do with the remainder. The 4 left over still need somewhere to go, so one more box is needed. We round the answer up.
    16 + 1 = 17
  10. Write the answer. Include the unit.
    17 boxes

Check. 16 × 6 = 96 and 96 + 4 = 100. ✓

Watch out. Do not round down here. The 4 left over would have no box.

Worked example 5.5.3
Leo has £50. Each cinema ticket costs £6. How many tickets can he buy?

Key words. The remainder is what is left over after you divide. The quotient is the answer to a division. Whether you round the answer up, round it down or use the remainder depends on the question.

Method. Divide, then think about what the remainder means in the story. The answer might be rounded up, rounded down, or be the remainder itself.

  1. Draw a bar model. We split 50 into groups of 6. Some may be left over.
    666· · ·62508 groups of 6 and 2 left over
  2. Choose the operation. We want to know how many groups of 6 fit into 50, so divide.
    50 ÷ 6
  3. Draw the bus stop. The number we are dividing goes inside. The number we divide by goes outside, on the left.
      
    650
  4. Divide the tens. Always start on the left, with the biggest place value.
    5 ÷ 6: 5 is smaller than 6, so we cannot give each share a whole ten. Write 0 (a 0 at the front is not part of the answer).
    Exchange the 5 tens for 50 ones. Carry 5 to the next digit.
  5. Divide the ones. Move to the next digit on the right. Add the 5 that was carried.
    The carried 5 makes 50 ones. With the 0 ones there are 50 + 0 = 50 ones.
    50 ÷ 6: 8 × 6 = 48, and 50 − 48 = 2. Write 8 above the 0.
    The remainder is 2.
  6. Read the answer. Ignore any 0 at the front of the answer.
    08r 2
    6550

    50 ÷ 6 = 8 r 2
  7. Say what the remainder means. 50 ÷ 6 = 8 remainder 2: that is 8 full tickets and 2 pounds left over.
    8 full tickets + 2 left over
  8. Decide what to do with the remainder. Only full tickets count. The 2 left over cannot make another one. We round the answer down (we ignore the remainder).
    8 full tickets
  9. Write the answer. Include the unit.
    8 tickets

Check. 8 × 6 = 48 and 48 + 2 = 50. ✓

Watch out. Do not round up here: the extra ticket would not be full.

Worked example 5.5.4
A baker has 150 cupcakes. She puts 8 cupcakes in each box. How many full boxes does she make?

Key words. The remainder is what is left over after you divide. The quotient is the answer to a division. Whether you round the answer up, round it down or use the remainder depends on the question.

Method. Divide, then think about what the remainder means in the story. The answer might be rounded up, rounded down, or be the remainder itself.

  1. Draw a bar model. We split 150 into groups of 8. Some may be left over.
    888· · ·8615018 groups of 8 and 6 left over
  2. Choose the operation. We want to know how many groups of 8 fit into 150, so divide.
    150 ÷ 8
  3. Draw the bus stop. The number we are dividing goes inside. The number we divide by goes outside, on the left.
       
    8150
  4. Divide the hundreds. Always start on the left, with the biggest place value.
    1 ÷ 8: 1 is smaller than 8, so we cannot give each share a whole hundred. Write 0 (a 0 at the front is not part of the answer).
    Exchange the 1 hundred for 10 tens. Carry 1 to the next digit.
  5. Divide the tens. Move to the next digit on the right. Add the 1 that was carried.
    The carried 1 makes 10 tens. With the 5 tens there are 10 + 5 = 15 tens.
    15 ÷ 8: 1 × 8 = 8, and 15 − 8 = 7. Write 1 above the 5.
    Exchange: 7 tens become 70 ones. Carry 7 to the next digit.
  6. Divide the ones. Move to the next digit on the right. Add the 7 that was carried.
    The carried 7 makes 70 ones. With the 0 ones there are 70 + 0 = 70 ones.
    70 ÷ 8: 8 × 8 = 64, and 70 − 64 = 6. Write 8 above the 0.
    The remainder is 6.
  7. Read the answer. Ignore any 0 at the front of the answer.
    018r 6
    811570

    150 ÷ 8 = 18 r 6
  8. Say what the remainder means. 150 ÷ 8 = 18 remainder 6: that is 18 full boxes and 6 cupcakes left over.
    18 full boxes + 6 left over
  9. Decide what to do with the remainder. Only full boxes count. The 6 left over cannot make another one. We round the answer down (we ignore the remainder).
    18 full boxes
  10. Write the answer. Include the unit.
    18 boxes

Check. 18 × 8 = 144 and 144 + 6 = 150. ✓

Watch out. Do not round up here: the extra box would not be full.

Worked example 5.5.5
There are 83 sweets. They are shared equally between 5 children. How many sweets are left over?

Key words. The remainder is what is left over after you divide. The quotient is the answer to a division. Whether you round the answer up, round it down or use the remainder depends on the question.

Method. Divide, then think about what the remainder means in the story. The answer might be rounded up, rounded down, or be the remainder itself.

  1. Draw a bar model. We split 83 into groups of 5. Some may be left over.
    555· · ·538316 groups of 5 and 3 left over
  2. Choose the operation. We want to know how many groups of 5 fit into 83, so divide.
    83 ÷ 5
  3. Draw the bus stop. The number we are dividing goes inside. The number we divide by goes outside, on the left.
      
    583
  4. Divide the tens. Always start on the left, with the biggest place value.
    8 ÷ 5 = 1, remainder 3
    Write 1 above the 8.
    Exchange the remainder: 3 tens become 30 ones. Carry 3 to the next digit.
  5. Divide the ones. Move to the next digit on the right. Add the 3 that was carried.
    The carried 3 makes 30 ones. With the 3 ones there are 30 + 3 = 33 ones.
    33 ÷ 5: 6 × 5 = 30, and 33 − 30 = 3. Write 6 above the 3.
    The remainder is 3.
  6. Read the answer. Read the digits above the line from left to right.
    16r 3
    5833

    83 ÷ 5 = 16 r 3
  7. Say what the remainder means. 83 ÷ 5 = 16 remainder 3: that is 16 full bags and 3 sweets left over.
    16 full bags + 3 left over
  8. Decide what to do with the remainder. The question asks how many are left over. That is the remainder itself.
    3 sweets left over
  9. Write the answer. Include the unit.
    3 sweets

Check. 16 × 5 = 80 and 80 + 3 = 83. ✓

Watch out. The answer is the remainder, not the number of full groups.

Worked example 5.5.6
Work out 7 ÷ 2. Write the answer as a remainder, as a fraction (or mixed number) and as a decimal.

Key words. The remainder is what is left over after you divide. The quotient is the answer to a division. Whether you round the answer up, round it down or use the remainder depends on the question.

Method. Divide to find the whole number and the remainder. The remainder can be written as a fraction (remainder over divisor) or carried on as a decimal.

  1. Divide with a remainder. First divide as usual and find the remainder.
    3r 1
    27

    7 ÷ 2 = 3 remainder 1
  2. Write the remainder as a fraction. The 1 left over is shared into 2 equal parts, so each share gets 12 of one more.
    12
    7 ÷ 2 = 3 r 1 = 312
  3. Write the remainder as a decimal. Add a point and 1 zero, and carry on dividing. The 1 left over becomes 10 tenths.
    3.5
    27.10

    7 ÷ 2 = 3.5
  4. Write all three answers. They all mean the same amount.
    3 r 1  =  312  =  3.5

Check. 3.5 × 2 = 7. ✓

Watch out. The fraction is the remainder over the divisor, not over the original number.

Worked example 5.5.7
Work out 13 ÷ 4. Write the answer as a remainder, as a fraction (or mixed number) and as a decimal.

Key words. The remainder is what is left over after you divide. The quotient is the answer to a division. Whether you round the answer up, round it down or use the remainder depends on the question.

Method. Divide to find the whole number and the remainder. The remainder can be written as a fraction (remainder over divisor) or carried on as a decimal.

  1. Divide with a remainder. First divide as usual and find the remainder.
    03r 1
    4113

    13 ÷ 4 = 3 remainder 1
  2. Write the remainder as a fraction. The 1 left over is shared into 4 equal parts, so each share gets 14 of one more.
    14
    13 ÷ 4 = 3 r 1 = 314
  3. Write the remainder as a decimal. Add a point and 2 zeros, and carry on dividing. The 1 left over becomes 10 tenths.
    03.25
    4113.1020

    13 ÷ 4 = 3.25
  4. Write all three answers. They all mean the same amount.
    3 r 1  =  314  =  3.25

Check. 3.25 × 4 = 13. ✓

Watch out. The fraction is the remainder over the divisor, not over the original number.

Worked example 5.5.8
Work out 3 ÷ 4. Write the answer as a remainder, as a fraction (or mixed number) and as a decimal.

Key words. The remainder is what is left over after you divide. The quotient is the answer to a division. Whether you round the answer up, round it down or use the remainder depends on the question.

Method. Divide to find the whole number and the remainder. The remainder can be written as a fraction (remainder over divisor) or carried on as a decimal.

  1. Divide with a remainder. First divide as usual and find the remainder.
    0r 3
    43

    3 ÷ 4 = 0 remainder 3
  2. Write the remainder as a fraction. The 3 left over is shared into 4 equal parts, so each share gets 34 of one more.
    34
    3 ÷ 4 = 0 r 3 = 34
  3. Write the remainder as a decimal. Add a point and 2 zeros, and carry on dividing. The 3 left over becomes 30 tenths.
    0.75
    43.3020

    3 ÷ 4 = 0.75
  4. Write all three answers. They all mean the same amount.
    0 r 3  =  34  =  0.75

Check. 0.75 × 4 = 3. ✓

Watch out. The fraction is the remainder over the divisor, not over the original number.

Worked example 5.5.9
Four friends share £9 equally. How much does each friend get?

Key words. Short division (the bus stop method): the number you divide goes inside the bus stop and the divisor goes outside. A remainder is what is left over. To exchange is to swap 1 of a place value for 10 of the next smaller one.

Method. Divide the pounds. If there is a remainder, carry on dividing into tenths and hundredths (10p and 1p).

  1. Choose the operation. £9 is shared equally between 4, so divide by 4. Money needs 2 decimal places (pounds and pence), so we add a point and 2 zeros.
    9 ÷ 4
  2. Draw the bus stop. The number we are dividing goes inside. The number we divide by goes outside, on the left. We write a decimal point and 2 zeros after the 9. They do not change its value, but they give us places to carry the remainder into.
       
    49.00
  3. Divide the ones. Always start on the left, with the biggest place value.
    9 ÷ 4 = 2, remainder 1
    Write 2 above the 9.
    Exchange the remainder: 1 one becomes 10 tenths. Carry 1 to the next digit.
  4. Divide the tenths. Move to the next digit on the right. Add the 1 that was carried.
    The carried 1 makes 10 tenths. With the 0 tenths there are 10 + 0 = 10 tenths.
    10 ÷ 4: 2 × 4 = 8, and 10 − 8 = 2. Write 2 above the 0.
    Exchange: 2 tenths become 20 hundredths. Carry 2 to the next digit.
  5. Divide the hundredths. Move to the next digit on the right. Add the 2 that was carried.
    The carried 2 makes 20 hundredths. With the 0 hundredths there are 20 + 0 = 20 hundredths.
    20 ÷ 4: 5 × 4 = 20. Write 5 above the 0.
    Nothing is left over, so the division is exact.
  6. Read the answer. Read the digits above the line from left to right. The point in the answer is straight above the point in the bus stop.
    2.25
    49.1020

    9 ÷ 4 = 2.25
  7. Write the answer in pounds and pence. Give the answer to 2 decimal places.
    £2.25

Check. £2.25 × 4 = £9. ✓

Watch out. Write money with 2 decimal places: £3.50, not £3.5.

Watch out

Do not just write the remainder after the answer without thinking. 100 ÷ 6 = 16 r 4 means 16 full boxes, but 17 boxes are needed for all the eggs. Also, the remainder in a fraction goes over the divisor, not over the original number: 7 ÷ 2 = 3 r 1 = 3½, not 31⁄7.

Exercise 5E  Remainders

Non-calculator
1
FWork out each division. Write each answer with a remainder.
(a)45 ÷ 6 =
(b)100 ÷ 7 =
(c)250 ÷ 8 =
2
FWork out each answer. You will need to round up.
(a)53 children go on a trip. A minibus holds 8 children. How many minibuses are needed?
(b)Dan has to carry 130 books. His bag holds 9 books. How many trips does he need to make?
(c)37 people each need a seat. A table seats 4 people. How many tables are needed?
3
FWork out each answer. You will need to round down.
(a)Aisha has 70p. Sweets cost 8p each. How many sweets can she buy?
(b)A ribbon is 100 cm long. Each gift needs 7 cm of ribbon. How many gifts can be wrapped?
(c)A baker has 150 cakes. A box holds 4 cakes. How many full boxes can she make?
4
FWork out each answer. The answer is the remainder.
(a)58 apples are shared equally between 7 baskets. How many apples are left over?
(b)100 cards are dealt equally to 9 players. How many cards are left over?
(c)Mei has 200 beads. She makes necklaces with 6 beads each. How many beads are left over?
5
FRead each question carefully. Round up, round down or use the remainder, then answer.
(a)A strip of card is 75 cm long. Strips of 4 cm are cut from it. How many whole strips can be cut?
(b)75 pupils take part in a game. Each team has 4 players. How many teams are needed so that everyone can play?
(c)75 pupils are put into teams of 4. How many pupils are not in a full team?
(d)Stickers are sold on sheets of 5. Ben needs 206 stickers. How many sheets must he buy?
6
FWrite each answer as a remainder, as a fraction (or mixed number) and as a decimal.
(a)9 ÷ 2 =
(b)13 ÷ 5 =
(c)3 ÷ 4 =
7
FShare the money equally. Write each answer in pounds and pence.
(a)£15 is shared equally between 4 friends. How much does each friend get?
(b)Two sisters share £7 equally. How much does each sister get?
(c)£18 is shared equally between 8 children. How much does each child get?
8
FA ribbon is 75 cm long. It is cut into pieces of 9 cm for bows.
999· · ·?75
(a)Work out 75 ÷ 9. Write the answer with a remainder.
(b)How many whole bows can be made?
(c)How long is the piece that is left?
9
PS150 people are going to a wedding. Each taxi takes 7 people. How many taxis are needed?
10
PSA teacher has 200 pencils. She shares them equally between 9 groups.
(a)How many pencils does each group get?
(b)How many pencils are left over?
11
PSDev cuts a 5 metre rope into 2 equal pieces. How long is each piece, in metres? Give your answer as a remainder, as a mixed number and as a decimal.
12
RThere are 100 eggs. Each box holds 6 eggs. Zoe says, “100 ÷ 6 = 16 r 4, so 16 boxes are needed.” What mistake has Zoe made? What is the correct answer?
13
RDo you round up, round down or use the remainder? Write your decision for each question and say why.
(a)A coach holds 50 passengers. How many coaches are needed for 230 passengers?
(b)Hana has £20. Each pack of pens costs £3. How many packs can she buy?
(c)There are 47 sweets shared between 5 children. How many are left over?
(d)A bus takes 40 children. There are 130 children. How many buses are needed?
14
RAlways, sometimes or never?
(a)A number that leaves a remainder of 3 when divided by 5 is odd.
(b)A number that leaves a remainder of 1 when divided by 2 is odd.
15
RChallenge! I am thinking of a number between 50 and 100. When I divide it by 8 the remainder is 3. When I divide it by 5 the remainder is 2. What is my number?

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