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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: 55 − ____ = 30
2. Find the missing number: 58 − ____ = 33
3. Find the missing number: 69 − ____ = 39
4. Find the missing number: 45 − ____ = 23
5. Find the missing number: 61 − ____ = 28
6. Find the missing number: 35 − ____ = 20
7. Find the missing number: 47 − ____ = 30
8. Find the missing number: 51 − ____ = 33
9. Find the missing number: 56 − ____ = 30
10. Find the missing number: 33 − ____ = 20
11. Find the missing number: 31 − ____ = 22
12. Find the missing number: 36 − ____ = 23
12 questions · Seed 111 · 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: 55 − ____ = 30
25Subtract 30 from 55: 55 − 30 = 25.
2. Find the missing number: 58 − ____ = 33
25Subtract 33 from 58: 58 − 33 = 25.
3. Find the missing number: 69 − ____ = 39
30Subtract 39 from 69: 69 − 39 = 30.
4. Find the missing number: 45 − ____ = 23
22Subtract 23 from 45: 45 − 23 = 22.
5. Find the missing number: 61 − ____ = 28
33Subtract 28 from 61: 61 − 28 = 33.
6. Find the missing number: 35 − ____ = 20
15Subtract 20 from 35: 35 − 20 = 15.
7. Find the missing number: 47 − ____ = 30
17Subtract 30 from 47: 47 − 30 = 17.
8. Find the missing number: 51 − ____ = 33
18Subtract 33 from 51: 51 − 33 = 18.
9. Find the missing number: 56 − ____ = 30
26Subtract 30 from 56: 56 − 30 = 26.
10. Find the missing number: 33 − ____ = 20
13Subtract 20 from 33: 33 − 20 = 13.
11. Find the missing number: 31 − ____ = 22
9Subtract 22 from 31: 31 − 22 = 9.
12. Find the missing number: 36 − ____ = 23
13Subtract 23 from 36: 36 − 23 = 13.
12 questions · Seed 111 · 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: 55 − ____ = 30
2. Find the missing number: 58 − ____ = 33
3. Find the missing number: 69 − ____ = 39
4. Find the missing number: 45 − ____ = 23
5. Find the missing number: 61 − ____ = 28
6. Find the missing number: 35 − ____ = 20
7. Find the missing number: 47 − ____ = 30
8. Find the missing number: 51 − ____ = 33
9. Find the missing number: 56 − ____ = 30
10. Find the missing number: 33 − ____ = 20
11. Find the missing number: 31 − ____ = 22
12. Find the missing number: 36 − ____ = 23
12 questions · Seed 111 · 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: 55 − ____ = 30
25Subtract 30 from 55: 55 − 30 = 25.
2. Find the missing number: 58 − ____ = 33
25Subtract 33 from 58: 58 − 33 = 25.
3. Find the missing number: 69 − ____ = 39
30Subtract 39 from 69: 69 − 39 = 30.
4. Find the missing number: 45 − ____ = 23
22Subtract 23 from 45: 45 − 23 = 22.
5. Find the missing number: 61 − ____ = 28
33Subtract 28 from 61: 61 − 28 = 33.
6. Find the missing number: 35 − ____ = 20
15Subtract 20 from 35: 35 − 20 = 15.
7. Find the missing number: 47 − ____ = 30
17Subtract 30 from 47: 47 − 30 = 17.
8. Find the missing number: 51 − ____ = 33
18Subtract 33 from 51: 51 − 33 = 18.
9. Find the missing number: 56 − ____ = 30
26Subtract 30 from 56: 56 − 30 = 26.
10. Find the missing number: 33 − ____ = 20
13Subtract 20 from 33: 33 − 20 = 13.
11. Find the missing number: 31 − ____ = 22
9Subtract 22 from 31: 31 − 22 = 9.
12. Find the missing number: 36 − ____ = 23
13Subtract 23 from 36: 36 − 23 = 13.
12 questions · Seed 111 · Age guidance, not curriculum certification