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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: 26 − ____ = 12
2. Find the missing number: 38 − ____ = 22
3. Find the missing number: 71 − ____ = 40
4. Find the missing number: 51 − ____ = 31
5. Find the missing number: 47 − ____ = 26
6. Find the missing number: 31 − ____ = 6
7. Find the missing number: 42 − ____ = 21
8. Find the missing number: 39 − ____ = 24
9. Find the missing number: 23 − ____ = 18
10. Find the missing number: 55 − ____ = 33
11. Find the missing number: 42 − ____ = 23
12. Find the missing number: 13 − ____ = 8
12 questions · Seed 69 · 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: 26 − ____ = 12
14Subtract 12 from 26: 26 − 12 = 14.
2. Find the missing number: 38 − ____ = 22
16Subtract 22 from 38: 38 − 22 = 16.
3. Find the missing number: 71 − ____ = 40
31Subtract 40 from 71: 71 − 40 = 31.
4. Find the missing number: 51 − ____ = 31
20Subtract 31 from 51: 51 − 31 = 20.
5. Find the missing number: 47 − ____ = 26
21Subtract 26 from 47: 47 − 26 = 21.
6. Find the missing number: 31 − ____ = 6
25Subtract 6 from 31: 31 − 6 = 25.
7. Find the missing number: 42 − ____ = 21
21Subtract 21 from 42: 42 − 21 = 21.
8. Find the missing number: 39 − ____ = 24
15Subtract 24 from 39: 39 − 24 = 15.
9. Find the missing number: 23 − ____ = 18
5Subtract 18 from 23: 23 − 18 = 5.
10. Find the missing number: 55 − ____ = 33
22Subtract 33 from 55: 55 − 33 = 22.
11. Find the missing number: 42 − ____ = 23
19Subtract 23 from 42: 42 − 23 = 19.
12. Find the missing number: 13 − ____ = 8
5Subtract 8 from 13: 13 − 8 = 5.
12 questions · Seed 69 · 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: 26 − ____ = 12
2. Find the missing number: 38 − ____ = 22
3. Find the missing number: 71 − ____ = 40
4. Find the missing number: 51 − ____ = 31
5. Find the missing number: 47 − ____ = 26
6. Find the missing number: 31 − ____ = 6
7. Find the missing number: 42 − ____ = 21
8. Find the missing number: 39 − ____ = 24
9. Find the missing number: 23 − ____ = 18
10. Find the missing number: 55 − ____ = 33
11. Find the missing number: 42 − ____ = 23
12. Find the missing number: 13 − ____ = 8
12 questions · Seed 69 · 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: 26 − ____ = 12
14Subtract 12 from 26: 26 − 12 = 14.
2. Find the missing number: 38 − ____ = 22
16Subtract 22 from 38: 38 − 22 = 16.
3. Find the missing number: 71 − ____ = 40
31Subtract 40 from 71: 71 − 40 = 31.
4. Find the missing number: 51 − ____ = 31
20Subtract 31 from 51: 51 − 31 = 20.
5. Find the missing number: 47 − ____ = 26
21Subtract 26 from 47: 47 − 26 = 21.
6. Find the missing number: 31 − ____ = 6
25Subtract 6 from 31: 31 − 6 = 25.
7. Find the missing number: 42 − ____ = 21
21Subtract 21 from 42: 42 − 21 = 21.
8. Find the missing number: 39 − ____ = 24
15Subtract 24 from 39: 39 − 24 = 15.
9. Find the missing number: 23 − ____ = 18
5Subtract 18 from 23: 23 − 18 = 5.
10. Find the missing number: 55 − ____ = 33
22Subtract 33 from 55: 55 − 33 = 22.
11. Find the missing number: 42 − ____ = 23
19Subtract 23 from 42: 42 − 23 = 19.
12. Find the missing number: 13 − ____ = 8
5Subtract 8 from 13: 13 − 8 = 5.
12 questions · Seed 69 · Age guidance, not curriculum certification