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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: 17 − ____ = 10
2. Find the missing number: 50 − ____ = 20
3. Find the missing number: 29 − ____ = 23
4. Find the missing number: 48 − ____ = 37
5. Find the missing number: 35 − ____ = 26
6. Find the missing number: 46 − ____ = 27
7. Find the missing number: 47 − ____ = 30
8. Find the missing number: 36 − ____ = 21
9. Find the missing number: 66 − ____ = 35
10. Find the missing number: 46 − ____ = 29
11. Find the missing number: 18 − ____ = 10
12. Find the missing number: 62 − ____ = 27
12 questions · Seed 92 · 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: 17 − ____ = 10
7Subtract 10 from 17: 17 − 10 = 7.
2. Find the missing number: 50 − ____ = 20
30Subtract 20 from 50: 50 − 20 = 30.
3. Find the missing number: 29 − ____ = 23
6Subtract 23 from 29: 29 − 23 = 6.
4. Find the missing number: 48 − ____ = 37
11Subtract 37 from 48: 48 − 37 = 11.
5. Find the missing number: 35 − ____ = 26
9Subtract 26 from 35: 35 − 26 = 9.
6. Find the missing number: 46 − ____ = 27
19Subtract 27 from 46: 46 − 27 = 19.
7. Find the missing number: 47 − ____ = 30
17Subtract 30 from 47: 47 − 30 = 17.
8. Find the missing number: 36 − ____ = 21
15Subtract 21 from 36: 36 − 21 = 15.
9. Find the missing number: 66 − ____ = 35
31Subtract 35 from 66: 66 − 35 = 31.
10. Find the missing number: 46 − ____ = 29
17Subtract 29 from 46: 46 − 29 = 17.
11. Find the missing number: 18 − ____ = 10
8Subtract 10 from 18: 18 − 10 = 8.
12. Find the missing number: 62 − ____ = 27
35Subtract 27 from 62: 62 − 27 = 35.
12 questions · Seed 92 · 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: 17 − ____ = 10
2. Find the missing number: 50 − ____ = 20
3. Find the missing number: 29 − ____ = 23
4. Find the missing number: 48 − ____ = 37
5. Find the missing number: 35 − ____ = 26
6. Find the missing number: 46 − ____ = 27
7. Find the missing number: 47 − ____ = 30
8. Find the missing number: 36 − ____ = 21
9. Find the missing number: 66 − ____ = 35
10. Find the missing number: 46 − ____ = 29
11. Find the missing number: 18 − ____ = 10
12. Find the missing number: 62 − ____ = 27
12 questions · Seed 92 · 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: 17 − ____ = 10
7Subtract 10 from 17: 17 − 10 = 7.
2. Find the missing number: 50 − ____ = 20
30Subtract 20 from 50: 50 − 20 = 30.
3. Find the missing number: 29 − ____ = 23
6Subtract 23 from 29: 29 − 23 = 6.
4. Find the missing number: 48 − ____ = 37
11Subtract 37 from 48: 48 − 37 = 11.
5. Find the missing number: 35 − ____ = 26
9Subtract 26 from 35: 35 − 26 = 9.
6. Find the missing number: 46 − ____ = 27
19Subtract 27 from 46: 46 − 27 = 19.
7. Find the missing number: 47 − ____ = 30
17Subtract 30 from 47: 47 − 30 = 17.
8. Find the missing number: 36 − ____ = 21
15Subtract 21 from 36: 36 − 21 = 15.
9. Find the missing number: 66 − ____ = 35
31Subtract 35 from 66: 66 − 35 = 31.
10. Find the missing number: 46 − ____ = 29
17Subtract 29 from 46: 46 − 29 = 17.
11. Find the missing number: 18 − ____ = 10
8Subtract 10 from 18: 18 − 10 = 8.
12. Find the missing number: 62 − ____ = 27
35Subtract 27 from 62: 62 − 27 = 35.
12 questions · Seed 92 · Age guidance, not curriculum certification