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: 40 − ____ = 25
2. Find the missing number: 51 − ____ = 39
3. Find the missing number: 40 − ____ = 21
4. Find the missing number: 55 − ____ = 20
5. Find the missing number: 35 − ____ = 26
6. Find the missing number: 56 − ____ = 22
7. Find the missing number: 21 − ____ = 17
8. Find the missing number: 11 − ____ = 5
9. Find the missing number: 46 − ____ = 17
10. Find the missing number: 23 − ____ = 19
11. Find the missing number: 58 − ____ = 40
12. Find the missing number: 46 − ____ = 15
12 questions · Seed 60 · 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: 40 − ____ = 25
15Subtract 25 from 40: 40 − 25 = 15.
2. Find the missing number: 51 − ____ = 39
12Subtract 39 from 51: 51 − 39 = 12.
3. Find the missing number: 40 − ____ = 21
19Subtract 21 from 40: 40 − 21 = 19.
4. Find the missing number: 55 − ____ = 20
35Subtract 20 from 55: 55 − 20 = 35.
5. Find the missing number: 35 − ____ = 26
9Subtract 26 from 35: 35 − 26 = 9.
6. Find the missing number: 56 − ____ = 22
34Subtract 22 from 56: 56 − 22 = 34.
7. Find the missing number: 21 − ____ = 17
4Subtract 17 from 21: 21 − 17 = 4.
8. Find the missing number: 11 − ____ = 5
6Subtract 5 from 11: 11 − 5 = 6.
9. Find the missing number: 46 − ____ = 17
29Subtract 17 from 46: 46 − 17 = 29.
10. Find the missing number: 23 − ____ = 19
4Subtract 19 from 23: 23 − 19 = 4.
11. Find the missing number: 58 − ____ = 40
18Subtract 40 from 58: 58 − 40 = 18.
12. Find the missing number: 46 − ____ = 15
31Subtract 15 from 46: 46 − 15 = 31.
12 questions · Seed 60 · 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: 40 − ____ = 25
2. Find the missing number: 51 − ____ = 39
3. Find the missing number: 40 − ____ = 21
4. Find the missing number: 55 − ____ = 20
5. Find the missing number: 35 − ____ = 26
6. Find the missing number: 56 − ____ = 22
7. Find the missing number: 21 − ____ = 17
8. Find the missing number: 11 − ____ = 5
9. Find the missing number: 46 − ____ = 17
10. Find the missing number: 23 − ____ = 19
11. Find the missing number: 58 − ____ = 40
12. Find the missing number: 46 − ____ = 15
12 questions · Seed 60 · 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: 40 − ____ = 25
15Subtract 25 from 40: 40 − 25 = 15.
2. Find the missing number: 51 − ____ = 39
12Subtract 39 from 51: 51 − 39 = 12.
3. Find the missing number: 40 − ____ = 21
19Subtract 21 from 40: 40 − 21 = 19.
4. Find the missing number: 55 − ____ = 20
35Subtract 20 from 55: 55 − 20 = 35.
5. Find the missing number: 35 − ____ = 26
9Subtract 26 from 35: 35 − 26 = 9.
6. Find the missing number: 56 − ____ = 22
34Subtract 22 from 56: 56 − 22 = 34.
7. Find the missing number: 21 − ____ = 17
4Subtract 17 from 21: 21 − 17 = 4.
8. Find the missing number: 11 − ____ = 5
6Subtract 5 from 11: 11 − 5 = 6.
9. Find the missing number: 46 − ____ = 17
29Subtract 17 from 46: 46 − 17 = 29.
10. Find the missing number: 23 − ____ = 19
4Subtract 19 from 23: 23 − 19 = 4.
11. Find the missing number: 58 − ____ = 40
18Subtract 40 from 58: 58 − 40 = 18.
12. Find the missing number: 46 − ____ = 15
31Subtract 15 from 46: 46 − 15 = 31.
12 questions · Seed 60 · Age guidance, not curriculum certification