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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: 39 − ____ = 30
2. Find the missing number: 48 − ____ = 15
3. Find the missing number: 15 − ____ = 7
4. Find the missing number: 46 − ____ = 27
5. Find the missing number: 44 − ____ = 22
6. Find the missing number: 14 − ____ = 9
7. Find the missing number: 39 − ____ = 16
8. Find the missing number: 35 − ____ = 15
9. Find the missing number: 51 − ____ = 40
10. Find the missing number: 24 − ____ = 9
11. Find the missing number: 57 − ____ = 39
12. Find the missing number: 54 − ____ = 40
12 questions · Seed 59 · 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: 39 − ____ = 30
9Subtract 30 from 39: 39 − 30 = 9.
2. Find the missing number: 48 − ____ = 15
33Subtract 15 from 48: 48 − 15 = 33.
3. Find the missing number: 15 − ____ = 7
8Subtract 7 from 15: 15 − 7 = 8.
4. Find the missing number: 46 − ____ = 27
19Subtract 27 from 46: 46 − 27 = 19.
5. Find the missing number: 44 − ____ = 22
22Subtract 22 from 44: 44 − 22 = 22.
6. Find the missing number: 14 − ____ = 9
5Subtract 9 from 14: 14 − 9 = 5.
7. Find the missing number: 39 − ____ = 16
23Subtract 16 from 39: 39 − 16 = 23.
8. Find the missing number: 35 − ____ = 15
20Subtract 15 from 35: 35 − 15 = 20.
9. Find the missing number: 51 − ____ = 40
11Subtract 40 from 51: 51 − 40 = 11.
10. Find the missing number: 24 − ____ = 9
15Subtract 9 from 24: 24 − 9 = 15.
11. Find the missing number: 57 − ____ = 39
18Subtract 39 from 57: 57 − 39 = 18.
12. Find the missing number: 54 − ____ = 40
14Subtract 40 from 54: 54 − 40 = 14.
12 questions · Seed 59 · 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: 39 − ____ = 30
2. Find the missing number: 48 − ____ = 15
3. Find the missing number: 15 − ____ = 7
4. Find the missing number: 46 − ____ = 27
5. Find the missing number: 44 − ____ = 22
6. Find the missing number: 14 − ____ = 9
7. Find the missing number: 39 − ____ = 16
8. Find the missing number: 35 − ____ = 15
9. Find the missing number: 51 − ____ = 40
10. Find the missing number: 24 − ____ = 9
11. Find the missing number: 57 − ____ = 39
12. Find the missing number: 54 − ____ = 40
12 questions · Seed 59 · 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: 39 − ____ = 30
9Subtract 30 from 39: 39 − 30 = 9.
2. Find the missing number: 48 − ____ = 15
33Subtract 15 from 48: 48 − 15 = 33.
3. Find the missing number: 15 − ____ = 7
8Subtract 7 from 15: 15 − 7 = 8.
4. Find the missing number: 46 − ____ = 27
19Subtract 27 from 46: 46 − 27 = 19.
5. Find the missing number: 44 − ____ = 22
22Subtract 22 from 44: 44 − 22 = 22.
6. Find the missing number: 14 − ____ = 9
5Subtract 9 from 14: 14 − 9 = 5.
7. Find the missing number: 39 − ____ = 16
23Subtract 16 from 39: 39 − 16 = 23.
8. Find the missing number: 35 − ____ = 15
20Subtract 15 from 35: 35 − 15 = 20.
9. Find the missing number: 51 − ____ = 40
11Subtract 40 from 51: 51 − 40 = 11.
10. Find the missing number: 24 − ____ = 9
15Subtract 9 from 24: 24 − 9 = 15.
11. Find the missing number: 57 − ____ = 39
18Subtract 39 from 57: 57 − 39 = 18.
12. Find the missing number: 54 − ____ = 40
14Subtract 40 from 54: 54 − 40 = 14.
12 questions · Seed 59 · Age guidance, not curriculum certification