Numbers and place value · Ages 6–7
Number bonds to 20 (splitting and making 20) worksheet
Part of: Numbers to 20
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Number bonds to 20 (splitting and making 20) worksheet
Numbers and place value · Ages 6–7
Numsprite
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Name:Date:Score:／48
Write each answer in the space. For word problems, show your working and write a sentence answer.
Part A: Working out and filling in (2 marks each)
1.17 + ? = 20
Answer:
2.11 + ? = 20
Answer:
3.13 + ? = 20
Answer:
4.4 + ? = 20
Answer:
5.14 + ? = 20
Answer:
6.9 + ? = 20
Answer:
7.8 + ? = 20
Answer:
8.19 + ? = 20
Answer:
9.5 + ? = 20
Answer:
10.1 + ? = 20
Answer:
11.15 + ? = 20
Answer:
12.7 + ? = 20
Answer:
Part B: Word problems (4 marks each)
13.A minibus has 20 seats and 2 passengers are sitting down. How many seats are empty?
Working:
Answer:
14.May plans to read 20 storybooks over the summer. She has read 3 so far. How many more does she need to read?
Working:
Answer:
15.A minibus has 20 seats and 16 passengers are sitting down. How many seats are empty?
Working:
Answer:
16.Ka-yan plans to read 20 storybooks over the summer. She has read 6 so far. How many more does she need to read?
Working:
Answer:
17.A box holds 20 cookies. Chi-keung's family ate some, and 12 are left in the box. How many cookies did they eat?
Working:
Answer:
18.A box holds 20 oranges. Tsz-hin's family ate some, and 13 are left in the box. How many oranges did they eat?
Working:
Answer:
Show the answers and working
Number bonds to 20 (splitting and making 20) worksheet: Answers and working
Part A: Working out and filling in
1. 17 + 3 = 20
Look at the ones: 7 goes with 3 to make ten, 17 + 3 = 20
2. 11 + 9 = 20
Look at the ones: 1 goes with 9 to make ten, 11 + 9 = 20
3. 13 + 7 = 20
Look at the ones: 3 goes with 7 to make ten, 13 + 7 = 20
4. 4 + 16 = 20
4 goes with 6 to make ten, and one more ten: 6 + 10 = 16, 4 + 16 = 20
5. 14 + 6 = 20
Look at the ones: 4 goes with 6 to make ten, 14 + 6 = 20
6. 9 + 11 = 20
9 goes with 1 to make ten, and one more ten: 1 + 10 = 11, 9 + 11 = 20
7. 8 + 12 = 20
8 goes with 2 to make ten, and one more ten: 2 + 10 = 12, 8 + 12 = 20
8. 19 + 1 = 20
Look at the ones: 9 goes with 1 to make ten, 19 + 1 = 20
9. 5 + 15 = 20
5 goes with 5 to make ten, and one more ten: 5 + 10 = 15, 5 + 15 = 20
10. 1 + 19 = 20
1 goes with 9 to make ten, and one more ten: 9 + 10 = 19, 1 + 19 = 20
11. 15 + 5 = 20
Look at the ones: 5 goes with 5 to make ten, 15 + 5 = 20
12. 7 + 13 = 20
7 goes with 3 to make ten, and one more ten: 3 + 10 = 13, 7 + 13 = 20
Part B: Word problems
Marking: 2 for the working, 1 for the answer, 1 for the sentence.
13. A minibus has 20 seats and 2 passengers are sitting down. How many seats are empty? (Answer: 18 seats)
20 − 2 = 18
14. May plans to read 20 storybooks over the summer. She has read 3 so far. How many more does she need to read? (Answer: 17 books)
20 − 3 = 17
15. A minibus has 20 seats and 16 passengers are sitting down. How many seats are empty? (Answer: 4 seats)
20 − 16 = 4
16. Ka-yan plans to read 20 storybooks over the summer. She has read 6 so far. How many more does she need to read? (Answer: 14 books)
20 − 6 = 14
17. A box holds 20 cookies. Chi-keung's family ate some, and 12 are left in the box. How many cookies did they eat? (Answer: 8 cookies)
18. A box holds 20 oranges. Tsz-hin's family ate some, and 13 are left in the box. How many oranges did they eat? (Answer: 7 oranges)
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