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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: 20 − ____ = 8
2. Find the missing number: 13 − ____ = 7
3. Find the missing number: 13 − ____ = 8
4. Find the missing number: 61 − ____ = 29
5. Find the missing number: 56 − ____ = 29
6. Find the missing number: 36 − ____ = 25
7. Find the missing number: 67 − ____ = 33
8. Find the missing number: 41 − ____ = 18
9. Find the missing number: 34 − ____ = 6
10. Find the missing number: 29 − ____ = 8
11. Find the missing number: 60 − ____ = 33
12. Find the missing number: 53 − ____ = 28
12 questions · Seed 66 · 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: 20 − ____ = 8
12Subtract 8 from 20: 20 − 8 = 12.
2. Find the missing number: 13 − ____ = 7
6Subtract 7 from 13: 13 − 7 = 6.
3. Find the missing number: 13 − ____ = 8
5Subtract 8 from 13: 13 − 8 = 5.
4. Find the missing number: 61 − ____ = 29
32Subtract 29 from 61: 61 − 29 = 32.
5. Find the missing number: 56 − ____ = 29
27Subtract 29 from 56: 56 − 29 = 27.
6. Find the missing number: 36 − ____ = 25
11Subtract 25 from 36: 36 − 25 = 11.
7. Find the missing number: 67 − ____ = 33
34Subtract 33 from 67: 67 − 33 = 34.
8. Find the missing number: 41 − ____ = 18
23Subtract 18 from 41: 41 − 18 = 23.
9. Find the missing number: 34 − ____ = 6
28Subtract 6 from 34: 34 − 6 = 28.
10. Find the missing number: 29 − ____ = 8
21Subtract 8 from 29: 29 − 8 = 21.
11. Find the missing number: 60 − ____ = 33
27Subtract 33 from 60: 60 − 33 = 27.
12. Find the missing number: 53 − ____ = 28
25Subtract 28 from 53: 53 − 28 = 25.
12 questions · Seed 66 · 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: 20 − ____ = 8
2. Find the missing number: 13 − ____ = 7
3. Find the missing number: 13 − ____ = 8
4. Find the missing number: 61 − ____ = 29
5. Find the missing number: 56 − ____ = 29
6. Find the missing number: 36 − ____ = 25
7. Find the missing number: 67 − ____ = 33
8. Find the missing number: 41 − ____ = 18
9. Find the missing number: 34 − ____ = 6
10. Find the missing number: 29 − ____ = 8
11. Find the missing number: 60 − ____ = 33
12. Find the missing number: 53 − ____ = 28
12 questions · Seed 66 · 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: 20 − ____ = 8
12Subtract 8 from 20: 20 − 8 = 12.
2. Find the missing number: 13 − ____ = 7
6Subtract 7 from 13: 13 − 7 = 6.
3. Find the missing number: 13 − ____ = 8
5Subtract 8 from 13: 13 − 8 = 5.
4. Find the missing number: 61 − ____ = 29
32Subtract 29 from 61: 61 − 29 = 32.
5. Find the missing number: 56 − ____ = 29
27Subtract 29 from 56: 56 − 29 = 27.
6. Find the missing number: 36 − ____ = 25
11Subtract 25 from 36: 36 − 25 = 11.
7. Find the missing number: 67 − ____ = 33
34Subtract 33 from 67: 67 − 33 = 34.
8. Find the missing number: 41 − ____ = 18
23Subtract 18 from 41: 41 − 18 = 23.
9. Find the missing number: 34 − ____ = 6
28Subtract 6 from 34: 34 − 6 = 28.
10. Find the missing number: 29 − ____ = 8
21Subtract 8 from 29: 29 − 8 = 21.
11. Find the missing number: 60 − ____ = 33
27Subtract 33 from 60: 60 − 33 = 27.
12. Find the missing number: 53 − ____ = 28
25Subtract 28 from 53: 53 − 28 = 25.
12 questions · Seed 66 · Age guidance, not curriculum certification