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Missing number in subtraction
Find the unknown number subtracted from a starting total to leave a given remainder. Review suitability for your learners before teaching.
Worksheet StudioPractice pack · Ages 7-9
Missing number in subtraction
Take your time. Show your thinking.
1. Find the missing number: 28 − ____ = 19
2. Find the missing number: 49 − ____ = 29
3. Find the missing number: 21 − ____ = 12
4. Find the missing number: 11 − ____ = 4
5. Find the missing number: 18 − ____ = 13
6. Find the missing number: 27 − ____ = 16
7. Find the missing number: 17 − ____ = 5
8. Find the missing number: 27 − ____ = 21
9. Find the missing number: 43 − ____ = 18
10. Find the missing number: 26 − ____ = 17
11. Find the missing number: 53 − ____ = 31
12. Find the missing number: 13 − ____ = 10
12 questions · Seed 115 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Missing number in subtraction
Answers and reasoning. Review before teaching.
1. Find the missing number: 28 − ____ = 19
9Subtract 19 from 28: 28 − 19 = 9.
2. Find the missing number: 49 − ____ = 29
20Subtract 29 from 49: 49 − 29 = 20.
3. Find the missing number: 21 − ____ = 12
9Subtract 12 from 21: 21 − 12 = 9.
4. Find the missing number: 11 − ____ = 4
7Subtract 4 from 11: 11 − 4 = 7.
5. Find the missing number: 18 − ____ = 13
5Subtract 13 from 18: 18 − 13 = 5.
6. Find the missing number: 27 − ____ = 16
11Subtract 16 from 27: 27 − 16 = 11.
7. Find the missing number: 17 − ____ = 5
12Subtract 5 from 17: 17 − 5 = 12.
8. Find the missing number: 27 − ____ = 21
6Subtract 21 from 27: 27 − 21 = 6.
9. Find the missing number: 43 − ____ = 18
25Subtract 18 from 43: 43 − 18 = 25.
10. Find the missing number: 26 − ____ = 17
9Subtract 17 from 26: 26 − 17 = 9.
11. Find the missing number: 53 − ____ = 31
22Subtract 31 from 53: 53 − 31 = 22.
12. Find the missing number: 13 − ____ = 10
3Subtract 10 from 13: 13 − 10 = 3.
12 questions · Seed 115 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Missing number in subtraction
Take your time. Show your thinking.
1. Find the missing number: 28 − ____ = 19
2. Find the missing number: 49 − ____ = 29
3. Find the missing number: 21 − ____ = 12
4. Find the missing number: 11 − ____ = 4
5. Find the missing number: 18 − ____ = 13
6. Find the missing number: 27 − ____ = 16
7. Find the missing number: 17 − ____ = 5
8. Find the missing number: 27 − ____ = 21
9. Find the missing number: 43 − ____ = 18
10. Find the missing number: 26 − ____ = 17
11. Find the missing number: 53 − ____ = 31
12. Find the missing number: 13 − ____ = 10
12 questions · Seed 115 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Missing number in subtraction
Answers and reasoning. Review before teaching.
1. Find the missing number: 28 − ____ = 19
9Subtract 19 from 28: 28 − 19 = 9.
2. Find the missing number: 49 − ____ = 29
20Subtract 29 from 49: 49 − 29 = 20.
3. Find the missing number: 21 − ____ = 12
9Subtract 12 from 21: 21 − 12 = 9.
4. Find the missing number: 11 − ____ = 4
7Subtract 4 from 11: 11 − 4 = 7.
5. Find the missing number: 18 − ____ = 13
5Subtract 13 from 18: 18 − 13 = 5.
6. Find the missing number: 27 − ____ = 16
11Subtract 16 from 27: 27 − 16 = 11.
7. Find the missing number: 17 − ____ = 5
12Subtract 5 from 17: 17 − 5 = 12.
8. Find the missing number: 27 − ____ = 21
6Subtract 21 from 27: 27 − 21 = 6.
9. Find the missing number: 43 − ____ = 18
25Subtract 18 from 43: 43 − 18 = 25.
10. Find the missing number: 26 − ____ = 17
9Subtract 17 from 26: 26 − 17 = 9.
11. Find the missing number: 53 − ____ = 31
22Subtract 31 from 53: 53 − 31 = 22.
12. Find the missing number: 13 − ____ = 10
3Subtract 10 from 13: 13 − 10 = 3.
12 questions · Seed 115 · Age guidance, not curriculum certification