Splitting and making numbers worksheet

Part A: Working out and filling in

1. 1. 17

   Start from the bigger number, then count on by the other one.

   Count on 9 more from 8: you reach 17.

2. 2. 3

   Count on from 3 up to 6 and keep track of how many steps that takes.

   Counting on from 3 to 6 takes 3 steps, so the other part is 3.

3. 3. 6

   Start from the bigger number, then count on by the other one.

   Count on 2 more from 4: you reach 6.

4. 4. 4

   Count on from 6 up to 10 and keep track of how many steps that takes.

   Counting on from 6 to 10 takes 4 steps, so the other part is 4.

5. 5. 2

   Count on from 7 up to 9 and keep track of how many steps that takes.

   Counting on from 7 to 9 takes 2 steps, so the other part is 2.

6. 6. 8, 9

   First split 18 into 1 ten and some ones. 9 is 1 less than 10, so what happens to the other part?

   18 is 1 ten and 8 ones: 10 and 8. 9 is 1 less than 10, so the other part is 1 more: 9 and 9.

7. 7. 9

   Count on from 3 up to 12 and keep track of how many steps that takes.

   12 splits into 3 and another part: counting on from 3 to 12 takes 9 steps, so □ is 9.

8. 8. 8

   Count on from 7 up to 15 and keep track of how many steps that takes.

   15 splits into 7 and another part: counting on from 7 to 15 takes 8 steps, so □ is 8.

9. 9. 5, 6

   First split 15 into 1 ten and some ones. 9 is 1 less than 10, so what happens to the other part?

   15 is 1 ten and 5 ones: 10 and 5. 9 is 1 less than 10, so the other part is 1 more: 9 and 6.

10. 10. 9

    Count on from 8 up to 17 and keep track of how many steps that takes.

    17 splits into 8 and another part: counting on from 8 to 17 takes 9 steps, so □ is 9.

Part B: Choose, or true or false

1. 11. D. 4 and 3

   Try each pair: count on from the first number by the second, and see if you land exactly on 8.

   Counting on 3 from 4 doesn't reach 8, so 4 and 3 don't make 8.

2. 12. A. 6 and 2

   Try each pair: count on from the first number by the second, and see if you land exactly on 9.

   Counting on 2 from 6 doesn't reach 9, so 6 and 2 don't make 9.

Part C: Word problems

Marking: 2 for the working, 1 for the answer, 1 for the sentence.

1. 13. 8 cars

   The 10 cars split into red and white. Count on from 2 to 10 and keep track of the steps.

   10 splits into 2 red and 8 white.

2. 14. 5, 4

   Start with the first box: 10 splits into 5 and another part, so count on from 5 to 10.

   Then split the second box's number into 1 and another part, counting on from 1 in the same way.

   10 splits into 5 and 5; 5 splits again into 1 and 4.

3. 15. 7 sweets

   The 8 sweets are split into two parts, one of 1. Count on from 1 up to 8.

   8 splits into 1 and the rest: counting on from 1 to 8 takes 7.

4. 16. 8 cars

   The 14 cars split into red and white. Count on from 6 to 14 and keep track of the steps.

   14 splits into 6 red and 8 white.

5. 17. 4 sweets

   The 5 sweets are split into two parts, one of 1. Count on from 1 up to 5.

   5 splits into 1 and the rest: counting on from 1 to 5 takes 4.

6. 18. 7, 6

   Start with the first box: 10 splits into 3 and another part, so count on from 3 to 10.

   Then split the second box's number into 1 and another part, counting on from 1 in the same way.

   10 splits into 3 and 7; 7 splits again into 1 and 6.