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Step-by-step practice: Maths · Level 2Chapter 1 · Counting to 100
Step-by-step Maths Level 2 · Counting to 100 · Lesson 1.5

Step-by-step Maths Level 2: Counting on from any number

Part of the Step-by-step Maths Level 2 counting to 100 chapter. Chapter overview · whole chapter on one page

1.5

Counting on from any number

Level 2
Count on and back from any number up to 100

You do not have to start at zero. Start at the number you are given.

Count on to go up. Count back to go down. The number line helps you to see the jumps.

4041424344454647484950515253545556
Start at 46 and count on 7 to reach 53.

Key ideas

  • Start at the number you are given.
  • Count on to go up, count back to go down.
  • Say each new number as you go.
Worked example 1.5.1
Start at 46. Count on 7. What number do you reach?
4041424344454647484950515253545556

Method. Start at the number and count on in steps.

  1. Start at the first number. It is where we begin.
    46
  2. Count on by 7. Say each new number as we go.
    46 + 7 = 53
  3. Write the answer. This is the last number we said.
    53

Check. Count back 7 from 53 to check. You arrive at 46.

Watch out. Count on from the number you start with, do not start again from zero.

Worked example 1.5.2
Start at 72. Count back 5. What number do you reach?

Method. Start at the number and count back in steps.

  1. Start at the first number. It is where we begin.
    72
  2. Count back by 5. Say each number we pass.
    72 - 5 = 67
  3. Write the answer. This is the last number we said.
    67

Check. Count on 5 from 67 to check. You arrive at 72.

Watch out. Count back from the number you start with. Do not count the starting number again.

Worked example 1.5.3
Start at 38. Count on 9. What number do you reach?

Method. Start at the number and count on in steps.

  1. Start at the first number. It is where we begin.
    38
  2. Count on by 9. Say each new number as we go.
    38 + 9 = 47
  3. Write the answer. This is the last number we said.
    47

Check. Count back 9 from 47 to check. You arrive at 38.

Watch out. Count on from the number you start with, do not start again from zero.

Watch out

Watch out. When you count on 7 from 46, you do not start again at 1. Begin at 46.

Exam tip

Grown-up tip. Use a number line or a hundred square. Ask the child to jump on the number line with a finger.

Exercise 1E  Practice: counting on and back

Non-calculator
1
PSStart at 66. Count back 4. What number do you reach?
5960616263646566676869
2
PSStart at 88. Count on 6. What number do you reach?
85868788899091929394959697
3
PSStart at 52. Count back 6. What number do you reach?
43444546474849505152535455
4
PSStart at 42. Count back 7. What number do you reach?
3233343536373839404142434445
5
PSStart at 40. Count on 6. What number do you reach?
37383940414243444546474849
6
PSStart at 34. Count on 2. What number do you reach?
313233343536373839
7
PSStart at 73. Count back 7. What number do you reach?
6364656667686970717273747576
8
PSStart at 24. Count back 8. What number do you reach?
131415161718192021222324252627
9
PSStart at 84. Count on 4. What number do you reach?
8182838485868788899091
10
PSStart at 17. Count on 7. What number do you reach?
1415161718192021222324252627
11
PSStart at 24. Count back 5. What number do you reach?
161718192021222324252627
12
PSStart at 90. Count on 4. What number do you reach?
8788899091929394959697
13
PSStart at 64. Count on 2. What number do you reach?
616263646566676869
14
PSStart at 11. Count on 3. What number do you reach?
891011121314151617
15
PSStart at 15. Count back 8. What number do you reach?
456789101112131415161718
16
PSStart at 50. Count on 4. What number do you reach?
4748495051525354555657

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