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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: 68 − ____ = 38
2. Find the missing number: 27 − ____ = 17
3. Find the missing number: 34 − ____ = 26
4. Find the missing number: 21 − ____ = 18
5. Find the missing number: 27 − ____ = 12
6. Find the missing number: 18 − ____ = 14
7. Find the missing number: 40 − ____ = 20
8. Find the missing number: 52 − ____ = 20
9. Find the missing number: 26 − ____ = 16
10. Find the missing number: 65 − ____ = 33
11. Find the missing number: 46 − ____ = 24
12. Find the missing number: 37 − ____ = 26
12 questions · Seed 87 · 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: 68 − ____ = 38
30Subtract 38 from 68: 68 − 38 = 30.
2. Find the missing number: 27 − ____ = 17
10Subtract 17 from 27: 27 − 17 = 10.
3. Find the missing number: 34 − ____ = 26
8Subtract 26 from 34: 34 − 26 = 8.
4. Find the missing number: 21 − ____ = 18
3Subtract 18 from 21: 21 − 18 = 3.
5. Find the missing number: 27 − ____ = 12
15Subtract 12 from 27: 27 − 12 = 15.
6. Find the missing number: 18 − ____ = 14
4Subtract 14 from 18: 18 − 14 = 4.
7. Find the missing number: 40 − ____ = 20
20Subtract 20 from 40: 40 − 20 = 20.
8. Find the missing number: 52 − ____ = 20
32Subtract 20 from 52: 52 − 20 = 32.
9. Find the missing number: 26 − ____ = 16
10Subtract 16 from 26: 26 − 16 = 10.
10. Find the missing number: 65 − ____ = 33
32Subtract 33 from 65: 65 − 33 = 32.
11. Find the missing number: 46 − ____ = 24
22Subtract 24 from 46: 46 − 24 = 22.
12. Find the missing number: 37 − ____ = 26
11Subtract 26 from 37: 37 − 26 = 11.
12 questions · Seed 87 · 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: 68 − ____ = 38
2. Find the missing number: 27 − ____ = 17
3. Find the missing number: 34 − ____ = 26
4. Find the missing number: 21 − ____ = 18
5. Find the missing number: 27 − ____ = 12
6. Find the missing number: 18 − ____ = 14
7. Find the missing number: 40 − ____ = 20
8. Find the missing number: 52 − ____ = 20
9. Find the missing number: 26 − ____ = 16
10. Find the missing number: 65 − ____ = 33
11. Find the missing number: 46 − ____ = 24
12. Find the missing number: 37 − ____ = 26
12 questions · Seed 87 · 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: 68 − ____ = 38
30Subtract 38 from 68: 68 − 38 = 30.
2. Find the missing number: 27 − ____ = 17
10Subtract 17 from 27: 27 − 17 = 10.
3. Find the missing number: 34 − ____ = 26
8Subtract 26 from 34: 34 − 26 = 8.
4. Find the missing number: 21 − ____ = 18
3Subtract 18 from 21: 21 − 18 = 3.
5. Find the missing number: 27 − ____ = 12
15Subtract 12 from 27: 27 − 12 = 15.
6. Find the missing number: 18 − ____ = 14
4Subtract 14 from 18: 18 − 14 = 4.
7. Find the missing number: 40 − ____ = 20
20Subtract 20 from 40: 40 − 20 = 20.
8. Find the missing number: 52 − ____ = 20
32Subtract 20 from 52: 52 − 20 = 32.
9. Find the missing number: 26 − ____ = 16
10Subtract 16 from 26: 26 − 16 = 10.
10. Find the missing number: 65 − ____ = 33
32Subtract 33 from 65: 65 − 33 = 32.
11. Find the missing number: 46 − ____ = 24
22Subtract 24 from 46: 46 − 24 = 22.
12. Find the missing number: 37 − ____ = 26
11Subtract 26 from 37: 37 − 26 = 11.
12 questions · Seed 87 · Age guidance, not curriculum certification