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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: 35 − ____ = 15
2. Find the missing number: 40 − ____ = 30
3. Find the missing number: 70 − ____ = 38
4. Find the missing number: 38 − ____ = 25
5. Find the missing number: 64 − ____ = 34
6. Find the missing number: 33 − ____ = 7
7. Find the missing number: 32 − ____ = 12
8. Find the missing number: 37 − ____ = 28
9. Find the missing number: 17 − ____ = 9
10. Find the missing number: 55 − ____ = 25
11. Find the missing number: 22 − ____ = 10
12. Find the missing number: 19 − ____ = 16
12 questions · Seed 103 · 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: 35 − ____ = 15
20Subtract 15 from 35: 35 − 15 = 20.
2. Find the missing number: 40 − ____ = 30
10Subtract 30 from 40: 40 − 30 = 10.
3. Find the missing number: 70 − ____ = 38
32Subtract 38 from 70: 70 − 38 = 32.
4. Find the missing number: 38 − ____ = 25
13Subtract 25 from 38: 38 − 25 = 13.
5. Find the missing number: 64 − ____ = 34
30Subtract 34 from 64: 64 − 34 = 30.
6. Find the missing number: 33 − ____ = 7
26Subtract 7 from 33: 33 − 7 = 26.
7. Find the missing number: 32 − ____ = 12
20Subtract 12 from 32: 32 − 12 = 20.
8. Find the missing number: 37 − ____ = 28
9Subtract 28 from 37: 37 − 28 = 9.
9. Find the missing number: 17 − ____ = 9
8Subtract 9 from 17: 17 − 9 = 8.
10. Find the missing number: 55 − ____ = 25
30Subtract 25 from 55: 55 − 25 = 30.
11. Find the missing number: 22 − ____ = 10
12Subtract 10 from 22: 22 − 10 = 12.
12. Find the missing number: 19 − ____ = 16
3Subtract 16 from 19: 19 − 16 = 3.
12 questions · Seed 103 · 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: 35 − ____ = 15
2. Find the missing number: 40 − ____ = 30
3. Find the missing number: 70 − ____ = 38
4. Find the missing number: 38 − ____ = 25
5. Find the missing number: 64 − ____ = 34
6. Find the missing number: 33 − ____ = 7
7. Find the missing number: 32 − ____ = 12
8. Find the missing number: 37 − ____ = 28
9. Find the missing number: 17 − ____ = 9
10. Find the missing number: 55 − ____ = 25
11. Find the missing number: 22 − ____ = 10
12. Find the missing number: 19 − ____ = 16
12 questions · Seed 103 · 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: 35 − ____ = 15
20Subtract 15 from 35: 35 − 15 = 20.
2. Find the missing number: 40 − ____ = 30
10Subtract 30 from 40: 40 − 30 = 10.
3. Find the missing number: 70 − ____ = 38
32Subtract 38 from 70: 70 − 38 = 32.
4. Find the missing number: 38 − ____ = 25
13Subtract 25 from 38: 38 − 25 = 13.
5. Find the missing number: 64 − ____ = 34
30Subtract 34 from 64: 64 − 34 = 30.
6. Find the missing number: 33 − ____ = 7
26Subtract 7 from 33: 33 − 7 = 26.
7. Find the missing number: 32 − ____ = 12
20Subtract 12 from 32: 32 − 12 = 20.
8. Find the missing number: 37 − ____ = 28
9Subtract 28 from 37: 37 − 28 = 9.
9. Find the missing number: 17 − ____ = 9
8Subtract 9 from 17: 17 − 9 = 8.
10. Find the missing number: 55 − ____ = 25
30Subtract 25 from 55: 55 − 25 = 30.
11. Find the missing number: 22 − ____ = 10
12Subtract 10 from 22: 22 − 10 = 12.
12. Find the missing number: 19 − ____ = 16
3Subtract 16 from 19: 19 − 16 = 3.
12 questions · Seed 103 · Age guidance, not curriculum certification