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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: 38 − ____ = 21
2. Find the missing number: 50 − ____ = 23
3. Find the missing number: 44 − ____ = 10
4. Find the missing number: 46 − ____ = 39
5. Find the missing number: 60 − ____ = 36
6. Find the missing number: 54 − ____ = 20
7. Find the missing number: 18 − ____ = 4
8. Find the missing number: 47 − ____ = 34
9. Find the missing number: 48 − ____ = 25
10. Find the missing number: 52 − ____ = 18
11. Find the missing number: 44 − ____ = 15
12. Find the missing number: 30 − ____ = 18
12 questions · Seed 98 · 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: 38 − ____ = 21
17Subtract 21 from 38: 38 − 21 = 17.
2. Find the missing number: 50 − ____ = 23
27Subtract 23 from 50: 50 − 23 = 27.
3. Find the missing number: 44 − ____ = 10
34Subtract 10 from 44: 44 − 10 = 34.
4. Find the missing number: 46 − ____ = 39
7Subtract 39 from 46: 46 − 39 = 7.
5. Find the missing number: 60 − ____ = 36
24Subtract 36 from 60: 60 − 36 = 24.
6. Find the missing number: 54 − ____ = 20
34Subtract 20 from 54: 54 − 20 = 34.
7. Find the missing number: 18 − ____ = 4
14Subtract 4 from 18: 18 − 4 = 14.
8. Find the missing number: 47 − ____ = 34
13Subtract 34 from 47: 47 − 34 = 13.
9. Find the missing number: 48 − ____ = 25
23Subtract 25 from 48: 48 − 25 = 23.
10. Find the missing number: 52 − ____ = 18
34Subtract 18 from 52: 52 − 18 = 34.
11. Find the missing number: 44 − ____ = 15
29Subtract 15 from 44: 44 − 15 = 29.
12. Find the missing number: 30 − ____ = 18
12Subtract 18 from 30: 30 − 18 = 12.
12 questions · Seed 98 · 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: 38 − ____ = 21
2. Find the missing number: 50 − ____ = 23
3. Find the missing number: 44 − ____ = 10
4. Find the missing number: 46 − ____ = 39
5. Find the missing number: 60 − ____ = 36
6. Find the missing number: 54 − ____ = 20
7. Find the missing number: 18 − ____ = 4
8. Find the missing number: 47 − ____ = 34
9. Find the missing number: 48 − ____ = 25
10. Find the missing number: 52 − ____ = 18
11. Find the missing number: 44 − ____ = 15
12. Find the missing number: 30 − ____ = 18
12 questions · Seed 98 · 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: 38 − ____ = 21
17Subtract 21 from 38: 38 − 21 = 17.
2. Find the missing number: 50 − ____ = 23
27Subtract 23 from 50: 50 − 23 = 27.
3. Find the missing number: 44 − ____ = 10
34Subtract 10 from 44: 44 − 10 = 34.
4. Find the missing number: 46 − ____ = 39
7Subtract 39 from 46: 46 − 39 = 7.
5. Find the missing number: 60 − ____ = 36
24Subtract 36 from 60: 60 − 36 = 24.
6. Find the missing number: 54 − ____ = 20
34Subtract 20 from 54: 54 − 20 = 34.
7. Find the missing number: 18 − ____ = 4
14Subtract 4 from 18: 18 − 4 = 14.
8. Find the missing number: 47 − ____ = 34
13Subtract 34 from 47: 47 − 34 = 13.
9. Find the missing number: 48 − ____ = 25
23Subtract 25 from 48: 48 − 25 = 23.
10. Find the missing number: 52 − ____ = 18
34Subtract 18 from 52: 52 − 18 = 34.
11. Find the missing number: 44 − ____ = 15
29Subtract 15 from 44: 44 − 15 = 29.
12. Find the missing number: 30 − ____ = 18
12Subtract 18 from 30: 30 − 18 = 12.
12 questions · Seed 98 · Age guidance, not curriculum certification