MENTAL MATH SUBTRACTION WORKSHEET

In each case, evaluate the expression.

Problem 1 :

17 - 3

Problem 2 :

38 - 5

Problem 3 :

62 - 7

Problem 4 :

98 - 9

Problem 5 :

56 - 8

Problem 6 :

75 - 7

Problem 7 :

37 - 26

Problem 8 :

64 - 42

Problem 9 :

66 - 19

Problem 10 :

47 - 29

Problem 11 :

72 - 49

Problem 12 :

80 - 39

Problem 13 :

468 - 16

Problem 14 :

697 - 18

Problem 15 :

276 - 39

Problem 16 :

380 - 49

Problem 17 :

373 - 132

Problem 18 :

986 - 345

Problem 19 :

465 - 374

Problem 20 :

579 - 189

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Answers

1. Answer :

17 - 3

= 14

2. Answer :

38 - 5

= 33

3. Answer :

62 - 7

= 60 + 2 - 2 - 5

= 60 - 5

= 55

4. Answer :

98 - 9

= 90 + 8 - 8 - 1

= 90 - 1

= 89

5. Answer :

56 - 8

= 50 + 6 - 6 - 2

= 50 - 2

= 48

6. Answer :

75 - 7

= 70 + 5 - 5 - 2

= 70 - 2

= 68

7. Answer :

37 - 26

= 37 - 20 - 6

= 17 - 6

= 11

8. Answer :

64 - 42

= 64 - 40 - 2

= 24 - 2

= 22

9. Answer :

66 - 19

= 66 - 20 + 1

= 46 + 1

= 47

10. Answer :

= 47 - 29

= 47 - 30 + 1

= 17 + 1

= 18

11. Answer :

= 72 - 49

= 72 - 50 + 1

= 22 + 1

= 23

12. Answer :

= 80 - 39

= 80 - 40 + 1

= 40 + 1

= 41

13. Answer :

468 - 16

= 468 - 10 - 6

= 458 - 6

= 452

14. Answer :

697 - 18

= 697 - 20 + 2

= 677 + 2

= 679

15. Answer :

276 - 39

= 276 - 40 + 1

= 236 + 1

= 237

16. Answer :

380 - 49

= 380 - 50 + 1

= 330 + 1

= 331

17. Answer :

373 - 132

= (300 - 100) + (73 - 32)

= 200 + 41

= 241

18. Answer :

986 - 345

= (900 - 300) + (86 - 45)

= 600 - 41

= 559

19. Answer :

465 - 374

= (400 - 300) - (74 - 65)

= 100 - 9

= 91

20. Answer :

579 - 189

= (500 - 100) - (89 - 79)

= 400 - 10

= 390

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