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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 10-12
Missing number in subtraction
Take your time. Show your thinking.
1. Find the missing number: 43 − ____ = 20
2. Find the missing number: 28 − ____ = 10
3. Find the missing number: 24 − ____ = 17
4. Find the missing number: 52 − ____ = 26
5. Find the missing number: 35 − ____ = 14
6. Find the missing number: 50 − ____ = 29
7. Find the missing number: 39 − ____ = 18
8. Find the missing number: 26 − ____ = 13
9. Find the missing number: 62 − ____ = 28
10. Find the missing number: 56 − ____ = 40
11. Find the missing number: 59 − ____ = 24
12. Find the missing number: 60 − ____ = 40
12 questions · Seed 56 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 10-12
Missing number in subtraction
Answers and reasoning. Review before teaching.
1. Find the missing number: 43 − ____ = 20
23Subtract 20 from 43: 43 − 20 = 23.
2. Find the missing number: 28 − ____ = 10
18Subtract 10 from 28: 28 − 10 = 18.
3. Find the missing number: 24 − ____ = 17
7Subtract 17 from 24: 24 − 17 = 7.
4. Find the missing number: 52 − ____ = 26
26Subtract 26 from 52: 52 − 26 = 26.
5. Find the missing number: 35 − ____ = 14
21Subtract 14 from 35: 35 − 14 = 21.
6. Find the missing number: 50 − ____ = 29
21Subtract 29 from 50: 50 − 29 = 21.
7. Find the missing number: 39 − ____ = 18
21Subtract 18 from 39: 39 − 18 = 21.
8. Find the missing number: 26 − ____ = 13
13Subtract 13 from 26: 26 − 13 = 13.
9. Find the missing number: 62 − ____ = 28
34Subtract 28 from 62: 62 − 28 = 34.
10. Find the missing number: 56 − ____ = 40
16Subtract 40 from 56: 56 − 40 = 16.
11. Find the missing number: 59 − ____ = 24
35Subtract 24 from 59: 59 − 24 = 35.
12. Find the missing number: 60 − ____ = 40
20Subtract 40 from 60: 60 − 40 = 20.
12 questions · Seed 56 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 10-12
Missing number in subtraction
Take your time. Show your thinking.
1. Find the missing number: 43 − ____ = 20
2. Find the missing number: 28 − ____ = 10
3. Find the missing number: 24 − ____ = 17
4. Find the missing number: 52 − ____ = 26
5. Find the missing number: 35 − ____ = 14
6. Find the missing number: 50 − ____ = 29
7. Find the missing number: 39 − ____ = 18
8. Find the missing number: 26 − ____ = 13
9. Find the missing number: 62 − ____ = 28
10. Find the missing number: 56 − ____ = 40
11. Find the missing number: 59 − ____ = 24
12. Find the missing number: 60 − ____ = 40
12 questions · Seed 56 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 10-12
Missing number in subtraction
Answers and reasoning. Review before teaching.
1. Find the missing number: 43 − ____ = 20
23Subtract 20 from 43: 43 − 20 = 23.
2. Find the missing number: 28 − ____ = 10
18Subtract 10 from 28: 28 − 10 = 18.
3. Find the missing number: 24 − ____ = 17
7Subtract 17 from 24: 24 − 17 = 7.
4. Find the missing number: 52 − ____ = 26
26Subtract 26 from 52: 52 − 26 = 26.
5. Find the missing number: 35 − ____ = 14
21Subtract 14 from 35: 35 − 14 = 21.
6. Find the missing number: 50 − ____ = 29
21Subtract 29 from 50: 50 − 29 = 21.
7. Find the missing number: 39 − ____ = 18
21Subtract 18 from 39: 39 − 18 = 21.
8. Find the missing number: 26 − ____ = 13
13Subtract 13 from 26: 26 − 13 = 13.
9. Find the missing number: 62 − ____ = 28
34Subtract 28 from 62: 62 − 28 = 34.
10. Find the missing number: 56 − ____ = 40
16Subtract 40 from 56: 56 − 40 = 16.
11. Find the missing number: 59 − ____ = 24
35Subtract 24 from 59: 59 − 24 = 35.
12. Find the missing number: 60 − ____ = 40
20Subtract 40 from 60: 60 − 40 = 20.
12 questions · Seed 56 · Age guidance, not curriculum certification