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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 7-9
Missing number in subtraction
Take your time. Show your thinking.
1. Find the missing number: 70 − ____ = 40
2. Find the missing number: 67 − ____ = 39
3. Find the missing number: 22 − ____ = 6
4. Find the missing number: 36 − ____ = 22
5. Find the missing number: 66 − ____ = 34
6. Find the missing number: 35 − ____ = 31
7. Find the missing number: 18 − ____ = 4
8. Find the missing number: 58 − ____ = 34
9. Find the missing number: 52 − ____ = 33
10. Find the missing number: 57 − ____ = 30
11. Find the missing number: 15 − ____ = 5
12. Find the missing number: 12 − ____ = 9
12 questions · Seed 123 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Missing number in subtraction
Answers and reasoning. Review before teaching.
1. Find the missing number: 70 − ____ = 40
30Subtract 40 from 70: 70 − 40 = 30.
2. Find the missing number: 67 − ____ = 39
28Subtract 39 from 67: 67 − 39 = 28.
3. Find the missing number: 22 − ____ = 6
16Subtract 6 from 22: 22 − 6 = 16.
4. Find the missing number: 36 − ____ = 22
14Subtract 22 from 36: 36 − 22 = 14.
5. Find the missing number: 66 − ____ = 34
32Subtract 34 from 66: 66 − 34 = 32.
6. Find the missing number: 35 − ____ = 31
4Subtract 31 from 35: 35 − 31 = 4.
7. Find the missing number: 18 − ____ = 4
14Subtract 4 from 18: 18 − 4 = 14.
8. Find the missing number: 58 − ____ = 34
24Subtract 34 from 58: 58 − 34 = 24.
9. Find the missing number: 52 − ____ = 33
19Subtract 33 from 52: 52 − 33 = 19.
10. Find the missing number: 57 − ____ = 30
27Subtract 30 from 57: 57 − 30 = 27.
11. Find the missing number: 15 − ____ = 5
10Subtract 5 from 15: 15 − 5 = 10.
12. Find the missing number: 12 − ____ = 9
3Subtract 9 from 12: 12 − 9 = 3.
12 questions · Seed 123 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Missing number in subtraction
Take your time. Show your thinking.
1. Find the missing number: 70 − ____ = 40
2. Find the missing number: 67 − ____ = 39
3. Find the missing number: 22 − ____ = 6
4. Find the missing number: 36 − ____ = 22
5. Find the missing number: 66 − ____ = 34
6. Find the missing number: 35 − ____ = 31
7. Find the missing number: 18 − ____ = 4
8. Find the missing number: 58 − ____ = 34
9. Find the missing number: 52 − ____ = 33
10. Find the missing number: 57 − ____ = 30
11. Find the missing number: 15 − ____ = 5
12. Find the missing number: 12 − ____ = 9
12 questions · Seed 123 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Missing number in subtraction
Answers and reasoning. Review before teaching.
1. Find the missing number: 70 − ____ = 40
30Subtract 40 from 70: 70 − 40 = 30.
2. Find the missing number: 67 − ____ = 39
28Subtract 39 from 67: 67 − 39 = 28.
3. Find the missing number: 22 − ____ = 6
16Subtract 6 from 22: 22 − 6 = 16.
4. Find the missing number: 36 − ____ = 22
14Subtract 22 from 36: 36 − 22 = 14.
5. Find the missing number: 66 − ____ = 34
32Subtract 34 from 66: 66 − 34 = 32.
6. Find the missing number: 35 − ____ = 31
4Subtract 31 from 35: 35 − 31 = 4.
7. Find the missing number: 18 − ____ = 4
14Subtract 4 from 18: 18 − 4 = 14.
8. Find the missing number: 58 − ____ = 34
24Subtract 34 from 58: 58 − 34 = 24.
9. Find the missing number: 52 − ____ = 33
19Subtract 33 from 52: 52 − 33 = 19.
10. Find the missing number: 57 − ____ = 30
27Subtract 30 from 57: 57 − 30 = 27.
11. Find the missing number: 15 − ____ = 5
10Subtract 5 from 15: 15 − 5 = 10.
12. Find the missing number: 12 − ____ = 9
3Subtract 9 from 12: 12 − 9 = 3.
12 questions · Seed 123 · Age guidance, not curriculum certification