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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 − ____ = 10
2. Find the missing number: 34 − ____ = 10
3. Find the missing number: 32 − ____ = 7
4. Find the missing number: 57 − ____ = 30
5. Find the missing number: 31 − ____ = 4
6. Find the missing number: 38 − ____ = 20
7. Find the missing number: 61 − ____ = 35
8. Find the missing number: 31 − ____ = 19
9. Find the missing number: 29 − ____ = 20
10. Find the missing number: 44 − ____ = 14
11. Find the missing number: 34 − ____ = 21
12. Find the missing number: 66 − ____ = 33
12 questions · Seed 78 · 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 − ____ = 10
25Subtract 10 from 35: 35 − 10 = 25.
2. Find the missing number: 34 − ____ = 10
24Subtract 10 from 34: 34 − 10 = 24.
3. Find the missing number: 32 − ____ = 7
25Subtract 7 from 32: 32 − 7 = 25.
4. Find the missing number: 57 − ____ = 30
27Subtract 30 from 57: 57 − 30 = 27.
5. Find the missing number: 31 − ____ = 4
27Subtract 4 from 31: 31 − 4 = 27.
6. Find the missing number: 38 − ____ = 20
18Subtract 20 from 38: 38 − 20 = 18.
7. Find the missing number: 61 − ____ = 35
26Subtract 35 from 61: 61 − 35 = 26.
8. Find the missing number: 31 − ____ = 19
12Subtract 19 from 31: 31 − 19 = 12.
9. Find the missing number: 29 − ____ = 20
9Subtract 20 from 29: 29 − 20 = 9.
10. Find the missing number: 44 − ____ = 14
30Subtract 14 from 44: 44 − 14 = 30.
11. Find the missing number: 34 − ____ = 21
13Subtract 21 from 34: 34 − 21 = 13.
12. Find the missing number: 66 − ____ = 33
33Subtract 33 from 66: 66 − 33 = 33.
12 questions · Seed 78 · 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 − ____ = 10
2. Find the missing number: 34 − ____ = 10
3. Find the missing number: 32 − ____ = 7
4. Find the missing number: 57 − ____ = 30
5. Find the missing number: 31 − ____ = 4
6. Find the missing number: 38 − ____ = 20
7. Find the missing number: 61 − ____ = 35
8. Find the missing number: 31 − ____ = 19
9. Find the missing number: 29 − ____ = 20
10. Find the missing number: 44 − ____ = 14
11. Find the missing number: 34 − ____ = 21
12. Find the missing number: 66 − ____ = 33
12 questions · Seed 78 · 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 − ____ = 10
25Subtract 10 from 35: 35 − 10 = 25.
2. Find the missing number: 34 − ____ = 10
24Subtract 10 from 34: 34 − 10 = 24.
3. Find the missing number: 32 − ____ = 7
25Subtract 7 from 32: 32 − 7 = 25.
4. Find the missing number: 57 − ____ = 30
27Subtract 30 from 57: 57 − 30 = 27.
5. Find the missing number: 31 − ____ = 4
27Subtract 4 from 31: 31 − 4 = 27.
6. Find the missing number: 38 − ____ = 20
18Subtract 20 from 38: 38 − 20 = 18.
7. Find the missing number: 61 − ____ = 35
26Subtract 35 from 61: 61 − 35 = 26.
8. Find the missing number: 31 − ____ = 19
12Subtract 19 from 31: 31 − 19 = 12.
9. Find the missing number: 29 − ____ = 20
9Subtract 20 from 29: 29 − 20 = 9.
10. Find the missing number: 44 − ____ = 14
30Subtract 14 from 44: 44 − 14 = 30.
11. Find the missing number: 34 − ____ = 21
13Subtract 21 from 34: 34 − 21 = 13.
12. Find the missing number: 66 − ____ = 33
33Subtract 33 from 66: 66 − 33 = 33.
12 questions · Seed 78 · Age guidance, not curriculum certification