Back to worksheetsMathsAges 10-12
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: 39 − ____ = 8
2. Find the missing number: 38 − ____ = 6
3. Find the missing number: 36 − ____ = 30
4. Find the missing number: 44 − ____ = 24
5. Find the missing number: 21 − ____ = 7
6. Find the missing number: 66 − ____ = 31
7. Find the missing number: 39 − ____ = 7
8. Find the missing number: 52 − ____ = 38
9. Find the missing number: 49 − ____ = 31
10. Find the missing number: 59 − ____ = 40
11. Find the missing number: 72 − ____ = 40
12. Find the missing number: 49 − ____ = 18
12 questions · Seed 121 · 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: 39 − ____ = 8
31Subtract 8 from 39: 39 − 8 = 31.
2. Find the missing number: 38 − ____ = 6
32Subtract 6 from 38: 38 − 6 = 32.
3. Find the missing number: 36 − ____ = 30
6Subtract 30 from 36: 36 − 30 = 6.
4. Find the missing number: 44 − ____ = 24
20Subtract 24 from 44: 44 − 24 = 20.
5. Find the missing number: 21 − ____ = 7
14Subtract 7 from 21: 21 − 7 = 14.
6. Find the missing number: 66 − ____ = 31
35Subtract 31 from 66: 66 − 31 = 35.
7. Find the missing number: 39 − ____ = 7
32Subtract 7 from 39: 39 − 7 = 32.
8. Find the missing number: 52 − ____ = 38
14Subtract 38 from 52: 52 − 38 = 14.
9. Find the missing number: 49 − ____ = 31
18Subtract 31 from 49: 49 − 31 = 18.
10. Find the missing number: 59 − ____ = 40
19Subtract 40 from 59: 59 − 40 = 19.
11. Find the missing number: 72 − ____ = 40
32Subtract 40 from 72: 72 − 40 = 32.
12. Find the missing number: 49 − ____ = 18
31Subtract 18 from 49: 49 − 18 = 31.
12 questions · Seed 121 · 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: 39 − ____ = 8
2. Find the missing number: 38 − ____ = 6
3. Find the missing number: 36 − ____ = 30
4. Find the missing number: 44 − ____ = 24
5. Find the missing number: 21 − ____ = 7
6. Find the missing number: 66 − ____ = 31
7. Find the missing number: 39 − ____ = 7
8. Find the missing number: 52 − ____ = 38
9. Find the missing number: 49 − ____ = 31
10. Find the missing number: 59 − ____ = 40
11. Find the missing number: 72 − ____ = 40
12. Find the missing number: 49 − ____ = 18
12 questions · Seed 121 · 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: 39 − ____ = 8
31Subtract 8 from 39: 39 − 8 = 31.
2. Find the missing number: 38 − ____ = 6
32Subtract 6 from 38: 38 − 6 = 32.
3. Find the missing number: 36 − ____ = 30
6Subtract 30 from 36: 36 − 30 = 6.
4. Find the missing number: 44 − ____ = 24
20Subtract 24 from 44: 44 − 24 = 20.
5. Find the missing number: 21 − ____ = 7
14Subtract 7 from 21: 21 − 7 = 14.
6. Find the missing number: 66 − ____ = 31
35Subtract 31 from 66: 66 − 31 = 35.
7. Find the missing number: 39 − ____ = 7
32Subtract 7 from 39: 39 − 7 = 32.
8. Find the missing number: 52 − ____ = 38
14Subtract 38 from 52: 52 − 38 = 14.
9. Find the missing number: 49 − ____ = 31
18Subtract 31 from 49: 49 − 31 = 18.
10. Find the missing number: 59 − ____ = 40
19Subtract 40 from 59: 59 − 40 = 19.
11. Find the missing number: 72 − ____ = 40
32Subtract 40 from 72: 72 − 40 = 32.
12. Find the missing number: 49 − ____ = 18
31Subtract 18 from 49: 49 − 18 = 31.
12 questions · Seed 121 · Age guidance, not curriculum certification