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Subtracting Positive and Negative Practice Problems and Answers


To solve the subtraction problems that involve two positive integers, simply subtract the smaller number from the larger number.To subtract a negative number, you can convert it to an equivalent positive number by changing the sign. For example, -5 can be converted to +5 by changing the sign.


1. Subtract: 15 - 7


2. Subtract: 35 - 12


3. Subtract: 82 - 63


4. Subtract: 50 - 25


5. Subtract: 9 - 4


6. Subtract: 27 - 18


7. Subtract: 46 - 31


8. Subtract: 75 - 50


9. Subtract: 24 - 15


10. Subtract: 98 - 72


11. Subtract: 16 - 20


12. Subtract: -12 - (-8)


13. Subtract: 30 - (-25)


14. Subtract: -6 - (-12)


15. Subtract: 11 - 11


16. Subtract: -20 - (-15)


17. Subtract: 40 - (-30)


18. Subtract: -5 - 7


19. Subtract: 22 - (-18)


20. Subtract: -9 - (-3)






Answer Key:


1. 8
2. 23
3. 19
4. 25
5. 5
6. 9
7. 15
8. 25
9. 9
10. 26
11. -4
12. -4
13. 55
14. 6
15. 0
16. -5
17. 70
18. -12
19. 40
20. -6


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