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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: 25 − ____ = 13
2. Find the missing number: 38 − ____ = 8
3. Find the missing number: 42 − ____ = 39
4. Find the missing number: 23 − ____ = 19
5. Find the missing number: 27 − ____ = 22
6. Find the missing number: 45 − ____ = 25
7. Find the missing number: 42 − ____ = 37
8. Find the missing number: 55 − ____ = 21
9. Find the missing number: 44 − ____ = 35
10. Find the missing number: 51 − ____ = 21
11. Find the missing number: 22 − ____ = 17
12. Find the missing number: 22 − ____ = 8
12 questions · Seed 108 · 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: 25 − ____ = 13
12Subtract 13 from 25: 25 − 13 = 12.
2. Find the missing number: 38 − ____ = 8
30Subtract 8 from 38: 38 − 8 = 30.
3. Find the missing number: 42 − ____ = 39
3Subtract 39 from 42: 42 − 39 = 3.
4. Find the missing number: 23 − ____ = 19
4Subtract 19 from 23: 23 − 19 = 4.
5. Find the missing number: 27 − ____ = 22
5Subtract 22 from 27: 27 − 22 = 5.
6. Find the missing number: 45 − ____ = 25
20Subtract 25 from 45: 45 − 25 = 20.
7. Find the missing number: 42 − ____ = 37
5Subtract 37 from 42: 42 − 37 = 5.
8. Find the missing number: 55 − ____ = 21
34Subtract 21 from 55: 55 − 21 = 34.
9. Find the missing number: 44 − ____ = 35
9Subtract 35 from 44: 44 − 35 = 9.
10. Find the missing number: 51 − ____ = 21
30Subtract 21 from 51: 51 − 21 = 30.
11. Find the missing number: 22 − ____ = 17
5Subtract 17 from 22: 22 − 17 = 5.
12. Find the missing number: 22 − ____ = 8
14Subtract 8 from 22: 22 − 8 = 14.
12 questions · Seed 108 · 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: 25 − ____ = 13
2. Find the missing number: 38 − ____ = 8
3. Find the missing number: 42 − ____ = 39
4. Find the missing number: 23 − ____ = 19
5. Find the missing number: 27 − ____ = 22
6. Find the missing number: 45 − ____ = 25
7. Find the missing number: 42 − ____ = 37
8. Find the missing number: 55 − ____ = 21
9. Find the missing number: 44 − ____ = 35
10. Find the missing number: 51 − ____ = 21
11. Find the missing number: 22 − ____ = 17
12. Find the missing number: 22 − ____ = 8
12 questions · Seed 108 · 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: 25 − ____ = 13
12Subtract 13 from 25: 25 − 13 = 12.
2. Find the missing number: 38 − ____ = 8
30Subtract 8 from 38: 38 − 8 = 30.
3. Find the missing number: 42 − ____ = 39
3Subtract 39 from 42: 42 − 39 = 3.
4. Find the missing number: 23 − ____ = 19
4Subtract 19 from 23: 23 − 19 = 4.
5. Find the missing number: 27 − ____ = 22
5Subtract 22 from 27: 27 − 22 = 5.
6. Find the missing number: 45 − ____ = 25
20Subtract 25 from 45: 45 − 25 = 20.
7. Find the missing number: 42 − ____ = 37
5Subtract 37 from 42: 42 − 37 = 5.
8. Find the missing number: 55 − ____ = 21
34Subtract 21 from 55: 55 − 21 = 34.
9. Find the missing number: 44 − ____ = 35
9Subtract 35 from 44: 44 − 35 = 9.
10. Find the missing number: 51 − ____ = 21
30Subtract 21 from 51: 51 − 21 = 30.
11. Find the missing number: 22 − ____ = 17
5Subtract 17 from 22: 22 − 17 = 5.
12. Find the missing number: 22 − ____ = 8
14Subtract 8 from 22: 22 − 8 = 14.
12 questions · Seed 108 · Age guidance, not curriculum certification