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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: 39 − ____ = 30
2. Find the missing number: 20 − ____ = 13
3. Find the missing number: 46 − ____ = 29
4. Find the missing number: 73 − ____ = 38
5. Find the missing number: 36 − ____ = 6
6. Find the missing number: 30 − ____ = 18
7. Find the missing number: 52 − ____ = 27
8. Find the missing number: 25 − ____ = 18
9. Find the missing number: 61 − ____ = 40
10. Find the missing number: 46 − ____ = 23
11. Find the missing number: 59 − ____ = 26
12. Find the missing number: 33 − ____ = 6
12 questions · Seed 109 · 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 − ____ = 30
9Subtract 30 from 39: 39 − 30 = 9.
2. Find the missing number: 20 − ____ = 13
7Subtract 13 from 20: 20 − 13 = 7.
3. Find the missing number: 46 − ____ = 29
17Subtract 29 from 46: 46 − 29 = 17.
4. Find the missing number: 73 − ____ = 38
35Subtract 38 from 73: 73 − 38 = 35.
5. Find the missing number: 36 − ____ = 6
30Subtract 6 from 36: 36 − 6 = 30.
6. Find the missing number: 30 − ____ = 18
12Subtract 18 from 30: 30 − 18 = 12.
7. Find the missing number: 52 − ____ = 27
25Subtract 27 from 52: 52 − 27 = 25.
8. Find the missing number: 25 − ____ = 18
7Subtract 18 from 25: 25 − 18 = 7.
9. Find the missing number: 61 − ____ = 40
21Subtract 40 from 61: 61 − 40 = 21.
10. Find the missing number: 46 − ____ = 23
23Subtract 23 from 46: 46 − 23 = 23.
11. Find the missing number: 59 − ____ = 26
33Subtract 26 from 59: 59 − 26 = 33.
12. Find the missing number: 33 − ____ = 6
27Subtract 6 from 33: 33 − 6 = 27.
12 questions · Seed 109 · 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 − ____ = 30
2. Find the missing number: 20 − ____ = 13
3. Find the missing number: 46 − ____ = 29
4. Find the missing number: 73 − ____ = 38
5. Find the missing number: 36 − ____ = 6
6. Find the missing number: 30 − ____ = 18
7. Find the missing number: 52 − ____ = 27
8. Find the missing number: 25 − ____ = 18
9. Find the missing number: 61 − ____ = 40
10. Find the missing number: 46 − ____ = 23
11. Find the missing number: 59 − ____ = 26
12. Find the missing number: 33 − ____ = 6
12 questions · Seed 109 · 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 − ____ = 30
9Subtract 30 from 39: 39 − 30 = 9.
2. Find the missing number: 20 − ____ = 13
7Subtract 13 from 20: 20 − 13 = 7.
3. Find the missing number: 46 − ____ = 29
17Subtract 29 from 46: 46 − 29 = 17.
4. Find the missing number: 73 − ____ = 38
35Subtract 38 from 73: 73 − 38 = 35.
5. Find the missing number: 36 − ____ = 6
30Subtract 6 from 36: 36 − 6 = 30.
6. Find the missing number: 30 − ____ = 18
12Subtract 18 from 30: 30 − 18 = 12.
7. Find the missing number: 52 − ____ = 27
25Subtract 27 from 52: 52 − 27 = 25.
8. Find the missing number: 25 − ____ = 18
7Subtract 18 from 25: 25 − 18 = 7.
9. Find the missing number: 61 − ____ = 40
21Subtract 40 from 61: 61 − 40 = 21.
10. Find the missing number: 46 − ____ = 23
23Subtract 23 from 46: 46 − 23 = 23.
11. Find the missing number: 59 − ____ = 26
33Subtract 26 from 59: 59 − 26 = 33.
12. Find the missing number: 33 − ____ = 6
27Subtract 6 from 33: 33 − 6 = 27.
12 questions · Seed 109 · Age guidance, not curriculum certification