Adding within 10 worksheet

Part A: Working out and filling in

1. 1. 0 + 10 = 10

   adding 0 changes nothing, 10 + 0 = 10

2. 2. 8 + 2 = 10

   Count on 2 from the bigger number 8: 9, 10, 8 + 2 = 10

3. 3. 2 + 2 = 4

   Count on 2 from the bigger number 2: 3, 4, 2 + 2 = 4

4. 4. 7 + 0 = 7

   adding 0 changes nothing, 7 + 0 = 7

5. 5. 4 + 2 = 6

   Count on 2 from the bigger number 4: 5, 6, 4 + 2 = 6

6. 6. 6 + 0 = 6

   adding 0 changes nothing, 6 + 0 = 6

7. 7. 6 + 4 = 10

   6 and 4 make ten, 6 + 4 = 10

8. 8. 1 + 6 = 7

   Count on 1 from the bigger number 6: 7, 6 + 1 = 7

9. 9. 7 + 3 = 10

   Count on 3 from the bigger number 7: 8, 9, 10, 7 + 3 = 10

10. 10. 4 + 5 = 9

    5 and 5 make ten; split 5 into 4 and 1: 5 + 5 = 10, so 5 + 4 is 1 less, 10 − 1 = 9

11. 11. 3 + 5 = 8

    Count on 3 from the bigger number 5: 6, 7, 8, 5 + 3 = 8

12. 12. 6 + 3 = 9

    Count on 3 from the bigger number 6: 7, 8, 9, 6 + 3 = 9

Part B: Word problems

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

1. 13. Ka-lok has 3 marbles and Ka-yan has 6. How many marbles do they have altogether? (Answer: 9 marbles)

   3 + 6 = 9

2. 14. Ka-yan has 4 stamps. That is 1 fewer than May has. How many stamps does May have? (Answer: 5 stamps)

   4 + 1 = 5

3. 15. There are 4 birds in a tree. 5 more fly in. How many birds are in the tree now? (Answer: 9 birds)

   4 + 5 = 9

4. 16. Ming has 4 stamps. That is 6 fewer than Ka-yan has. How many stamps does Ka-yan have? (Answer: 10 stamps)

   4 + 6 = 10

5. 17. Ka-yan has 7 marbles and Tsz-hin has 1. How many marbles do they have altogether? (Answer: 8 marbles)

   7 + 1 = 8

6. 18. There are 6 birds in a tree. 4 more fly in. How many birds are in the tree now? (Answer: 10 birds)

   6 + 4 = 10