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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: 51 − ____ = 21
2. Find the missing number: 52 − ____ = 27
3. Find the missing number: 18 − ____ = 13
4. Find the missing number: 48 − ____ = 17
5. Find the missing number: 41 − ____ = 35
6. Find the missing number: 46 − ____ = 11
7. Find the missing number: 41 − ____ = 23
8. Find the missing number: 62 − ____ = 28
9. Find the missing number: 26 − ____ = 7
10. Find the missing number: 51 − ____ = 31
11. Find the missing number: 44 − ____ = 32
12. Find the missing number: 56 − ____ = 33
12 questions · Seed 104762 · 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: 51 − ____ = 21
30Subtract 21 from 51: 51 − 21 = 30.
2. Find the missing number: 52 − ____ = 27
25Subtract 27 from 52: 52 − 27 = 25.
3. Find the missing number: 18 − ____ = 13
5Subtract 13 from 18: 18 − 13 = 5.
4. Find the missing number: 48 − ____ = 17
31Subtract 17 from 48: 48 − 17 = 31.
5. Find the missing number: 41 − ____ = 35
6Subtract 35 from 41: 41 − 35 = 6.
6. Find the missing number: 46 − ____ = 11
35Subtract 11 from 46: 46 − 11 = 35.
7. Find the missing number: 41 − ____ = 23
18Subtract 23 from 41: 41 − 23 = 18.
8. Find the missing number: 62 − ____ = 28
34Subtract 28 from 62: 62 − 28 = 34.
9. Find the missing number: 26 − ____ = 7
19Subtract 7 from 26: 26 − 7 = 19.
10. Find the missing number: 51 − ____ = 31
20Subtract 31 from 51: 51 − 31 = 20.
11. Find the missing number: 44 − ____ = 32
12Subtract 32 from 44: 44 − 32 = 12.
12. Find the missing number: 56 − ____ = 33
23Subtract 33 from 56: 56 − 33 = 23.
12 questions · Seed 104762 · 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: 51 − ____ = 21
2. Find the missing number: 52 − ____ = 27
3. Find the missing number: 18 − ____ = 13
4. Find the missing number: 48 − ____ = 17
5. Find the missing number: 41 − ____ = 35
6. Find the missing number: 46 − ____ = 11
7. Find the missing number: 41 − ____ = 23
8. Find the missing number: 62 − ____ = 28
9. Find the missing number: 26 − ____ = 7
10. Find the missing number: 51 − ____ = 31
11. Find the missing number: 44 − ____ = 32
12. Find the missing number: 56 − ____ = 33
12 questions · Seed 104762 · 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: 51 − ____ = 21
30Subtract 21 from 51: 51 − 21 = 30.
2. Find the missing number: 52 − ____ = 27
25Subtract 27 from 52: 52 − 27 = 25.
3. Find the missing number: 18 − ____ = 13
5Subtract 13 from 18: 18 − 13 = 5.
4. Find the missing number: 48 − ____ = 17
31Subtract 17 from 48: 48 − 17 = 31.
5. Find the missing number: 41 − ____ = 35
6Subtract 35 from 41: 41 − 35 = 6.
6. Find the missing number: 46 − ____ = 11
35Subtract 11 from 46: 46 − 11 = 35.
7. Find the missing number: 41 − ____ = 23
18Subtract 23 from 41: 41 − 23 = 18.
8. Find the missing number: 62 − ____ = 28
34Subtract 28 from 62: 62 − 28 = 34.
9. Find the missing number: 26 − ____ = 7
19Subtract 7 from 26: 26 − 7 = 19.
10. Find the missing number: 51 − ____ = 31
20Subtract 31 from 51: 51 − 31 = 20.
11. Find the missing number: 44 − ____ = 32
12Subtract 32 from 44: 44 − 32 = 12.
12. Find the missing number: 56 − ____ = 33
23Subtract 33 from 56: 56 − 33 = 23.
12 questions · Seed 104762 · Age guidance, not curriculum certification