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: 29 − ____ = 19
2. Find the missing number: 48 − ____ = 21
3. Find the missing number: 40 − ____ = 18
4. Find the missing number: 52 − ____ = 36
5. Find the missing number: 34 − ____ = 17
6. Find the missing number: 54 − ____ = 36
7. Find the missing number: 38 − ____ = 24
8. Find the missing number: 67 − ____ = 39
9. Find the missing number: 30 − ____ = 18
10. Find the missing number: 36 − ____ = 18
11. Find the missing number: 15 − ____ = 5
12. Find the missing number: 30 − ____ = 14
12 questions · Seed 57 · 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: 29 − ____ = 19
10Subtract 19 from 29: 29 − 19 = 10.
2. Find the missing number: 48 − ____ = 21
27Subtract 21 from 48: 48 − 21 = 27.
3. Find the missing number: 40 − ____ = 18
22Subtract 18 from 40: 40 − 18 = 22.
4. Find the missing number: 52 − ____ = 36
16Subtract 36 from 52: 52 − 36 = 16.
5. Find the missing number: 34 − ____ = 17
17Subtract 17 from 34: 34 − 17 = 17.
6. Find the missing number: 54 − ____ = 36
18Subtract 36 from 54: 54 − 36 = 18.
7. Find the missing number: 38 − ____ = 24
14Subtract 24 from 38: 38 − 24 = 14.
8. Find the missing number: 67 − ____ = 39
28Subtract 39 from 67: 67 − 39 = 28.
9. Find the missing number: 30 − ____ = 18
12Subtract 18 from 30: 30 − 18 = 12.
10. Find the missing number: 36 − ____ = 18
18Subtract 18 from 36: 36 − 18 = 18.
11. Find the missing number: 15 − ____ = 5
10Subtract 5 from 15: 15 − 5 = 10.
12. Find the missing number: 30 − ____ = 14
16Subtract 14 from 30: 30 − 14 = 16.
12 questions · Seed 57 · 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: 29 − ____ = 19
2. Find the missing number: 48 − ____ = 21
3. Find the missing number: 40 − ____ = 18
4. Find the missing number: 52 − ____ = 36
5. Find the missing number: 34 − ____ = 17
6. Find the missing number: 54 − ____ = 36
7. Find the missing number: 38 − ____ = 24
8. Find the missing number: 67 − ____ = 39
9. Find the missing number: 30 − ____ = 18
10. Find the missing number: 36 − ____ = 18
11. Find the missing number: 15 − ____ = 5
12. Find the missing number: 30 − ____ = 14
12 questions · Seed 57 · 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: 29 − ____ = 19
10Subtract 19 from 29: 29 − 19 = 10.
2. Find the missing number: 48 − ____ = 21
27Subtract 21 from 48: 48 − 21 = 27.
3. Find the missing number: 40 − ____ = 18
22Subtract 18 from 40: 40 − 18 = 22.
4. Find the missing number: 52 − ____ = 36
16Subtract 36 from 52: 52 − 36 = 16.
5. Find the missing number: 34 − ____ = 17
17Subtract 17 from 34: 34 − 17 = 17.
6. Find the missing number: 54 − ____ = 36
18Subtract 36 from 54: 54 − 36 = 18.
7. Find the missing number: 38 − ____ = 24
14Subtract 24 from 38: 38 − 24 = 14.
8. Find the missing number: 67 − ____ = 39
28Subtract 39 from 67: 67 − 39 = 28.
9. Find the missing number: 30 − ____ = 18
12Subtract 18 from 30: 30 − 18 = 12.
10. Find the missing number: 36 − ____ = 18
18Subtract 18 from 36: 36 − 18 = 18.
11. Find the missing number: 15 − ____ = 5
10Subtract 5 from 15: 15 − 5 = 10.
12. Find the missing number: 30 − ____ = 14
16Subtract 14 from 30: 30 − 14 = 16.
12 questions · Seed 57 · Age guidance, not curriculum certification