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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: 36 − ____ = 18
2. Find the missing number: 18 − ____ = 15
3. Find the missing number: 62 − ____ = 39
4. Find the missing number: 32 − ____ = 13
5. Find the missing number: 45 − ____ = 34
6. Find the missing number: 16 − ____ = 4
7. Find the missing number: 48 − ____ = 32
8. Find the missing number: 40 − ____ = 35
9. Find the missing number: 11 − ____ = 4
10. Find the missing number: 48 − ____ = 26
11. Find the missing number: 35 − ____ = 4
12. Find the missing number: 21 − ____ = 15
12 questions · Seed 114 · 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: 36 − ____ = 18
18Subtract 18 from 36: 36 − 18 = 18.
2. Find the missing number: 18 − ____ = 15
3Subtract 15 from 18: 18 − 15 = 3.
3. Find the missing number: 62 − ____ = 39
23Subtract 39 from 62: 62 − 39 = 23.
4. Find the missing number: 32 − ____ = 13
19Subtract 13 from 32: 32 − 13 = 19.
5. Find the missing number: 45 − ____ = 34
11Subtract 34 from 45: 45 − 34 = 11.
6. Find the missing number: 16 − ____ = 4
12Subtract 4 from 16: 16 − 4 = 12.
7. Find the missing number: 48 − ____ = 32
16Subtract 32 from 48: 48 − 32 = 16.
8. Find the missing number: 40 − ____ = 35
5Subtract 35 from 40: 40 − 35 = 5.
9. Find the missing number: 11 − ____ = 4
7Subtract 4 from 11: 11 − 4 = 7.
10. Find the missing number: 48 − ____ = 26
22Subtract 26 from 48: 48 − 26 = 22.
11. Find the missing number: 35 − ____ = 4
31Subtract 4 from 35: 35 − 4 = 31.
12. Find the missing number: 21 − ____ = 15
6Subtract 15 from 21: 21 − 15 = 6.
12 questions · Seed 114 · 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: 36 − ____ = 18
2. Find the missing number: 18 − ____ = 15
3. Find the missing number: 62 − ____ = 39
4. Find the missing number: 32 − ____ = 13
5. Find the missing number: 45 − ____ = 34
6. Find the missing number: 16 − ____ = 4
7. Find the missing number: 48 − ____ = 32
8. Find the missing number: 40 − ____ = 35
9. Find the missing number: 11 − ____ = 4
10. Find the missing number: 48 − ____ = 26
11. Find the missing number: 35 − ____ = 4
12. Find the missing number: 21 − ____ = 15
12 questions · Seed 114 · 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: 36 − ____ = 18
18Subtract 18 from 36: 36 − 18 = 18.
2. Find the missing number: 18 − ____ = 15
3Subtract 15 from 18: 18 − 15 = 3.
3. Find the missing number: 62 − ____ = 39
23Subtract 39 from 62: 62 − 39 = 23.
4. Find the missing number: 32 − ____ = 13
19Subtract 13 from 32: 32 − 13 = 19.
5. Find the missing number: 45 − ____ = 34
11Subtract 34 from 45: 45 − 34 = 11.
6. Find the missing number: 16 − ____ = 4
12Subtract 4 from 16: 16 − 4 = 12.
7. Find the missing number: 48 − ____ = 32
16Subtract 32 from 48: 48 − 32 = 16.
8. Find the missing number: 40 − ____ = 35
5Subtract 35 from 40: 40 − 35 = 5.
9. Find the missing number: 11 − ____ = 4
7Subtract 4 from 11: 11 − 4 = 7.
10. Find the missing number: 48 − ____ = 26
22Subtract 26 from 48: 48 − 26 = 22.
11. Find the missing number: 35 − ____ = 4
31Subtract 4 from 35: 35 − 4 = 31.
12. Find the missing number: 21 − ____ = 15
6Subtract 15 from 21: 21 − 15 = 6.
12 questions · Seed 114 · Age guidance, not curriculum certification