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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: 50 − ____ = 29
2. Find the missing number: 58 − ____ = 28
3. Find the missing number: 33 − ____ = 10
4. Find the missing number: 35 − ____ = 5
5. Find the missing number: 15 − ____ = 7
6. Find the missing number: 66 − ____ = 38
7. Find the missing number: 35 − ____ = 18
8. Find the missing number: 51 − ____ = 17
9. Find the missing number: 31 − ____ = 9
10. Find the missing number: 18 − ____ = 6
11. Find the missing number: 27 − ____ = 24
12. Find the missing number: 28 − ____ = 25
12 questions · Seed 104768 · 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: 50 − ____ = 29
21Subtract 29 from 50: 50 − 29 = 21.
2. Find the missing number: 58 − ____ = 28
30Subtract 28 from 58: 58 − 28 = 30.
3. Find the missing number: 33 − ____ = 10
23Subtract 10 from 33: 33 − 10 = 23.
4. Find the missing number: 35 − ____ = 5
30Subtract 5 from 35: 35 − 5 = 30.
5. Find the missing number: 15 − ____ = 7
8Subtract 7 from 15: 15 − 7 = 8.
6. Find the missing number: 66 − ____ = 38
28Subtract 38 from 66: 66 − 38 = 28.
7. Find the missing number: 35 − ____ = 18
17Subtract 18 from 35: 35 − 18 = 17.
8. Find the missing number: 51 − ____ = 17
34Subtract 17 from 51: 51 − 17 = 34.
9. Find the missing number: 31 − ____ = 9
22Subtract 9 from 31: 31 − 9 = 22.
10. Find the missing number: 18 − ____ = 6
12Subtract 6 from 18: 18 − 6 = 12.
11. Find the missing number: 27 − ____ = 24
3Subtract 24 from 27: 27 − 24 = 3.
12. Find the missing number: 28 − ____ = 25
3Subtract 25 from 28: 28 − 25 = 3.
12 questions · Seed 104768 · 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: 50 − ____ = 29
2. Find the missing number: 58 − ____ = 28
3. Find the missing number: 33 − ____ = 10
4. Find the missing number: 35 − ____ = 5
5. Find the missing number: 15 − ____ = 7
6. Find the missing number: 66 − ____ = 38
7. Find the missing number: 35 − ____ = 18
8. Find the missing number: 51 − ____ = 17
9. Find the missing number: 31 − ____ = 9
10. Find the missing number: 18 − ____ = 6
11. Find the missing number: 27 − ____ = 24
12. Find the missing number: 28 − ____ = 25
12 questions · Seed 104768 · 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: 50 − ____ = 29
21Subtract 29 from 50: 50 − 29 = 21.
2. Find the missing number: 58 − ____ = 28
30Subtract 28 from 58: 58 − 28 = 30.
3. Find the missing number: 33 − ____ = 10
23Subtract 10 from 33: 33 − 10 = 23.
4. Find the missing number: 35 − ____ = 5
30Subtract 5 from 35: 35 − 5 = 30.
5. Find the missing number: 15 − ____ = 7
8Subtract 7 from 15: 15 − 7 = 8.
6. Find the missing number: 66 − ____ = 38
28Subtract 38 from 66: 66 − 38 = 28.
7. Find the missing number: 35 − ____ = 18
17Subtract 18 from 35: 35 − 18 = 17.
8. Find the missing number: 51 − ____ = 17
34Subtract 17 from 51: 51 − 17 = 34.
9. Find the missing number: 31 − ____ = 9
22Subtract 9 from 31: 31 − 9 = 22.
10. Find the missing number: 18 − ____ = 6
12Subtract 6 from 18: 18 − 6 = 12.
11. Find the missing number: 27 − ____ = 24
3Subtract 24 from 27: 27 − 24 = 3.
12. Find the missing number: 28 − ____ = 25
3Subtract 25 from 28: 28 − 25 = 3.
12 questions · Seed 104768 · Age guidance, not curriculum certification