Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 109 · 40 questions

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

1. 1.340 − 37 =
2. 2.160 − 78 =
3. 3.402 − 79 =
4. 4.278 − 38 =
5. 5.402 − 69 =
6. 6.106 − 77 =
7. 7.223 − 97 =
8. 8.219 − 28 =
9. 9.265 − 99 =
10. 10.361 − 69 =
11. 11.84 − 29 =
12. 12.66 − 29 =
13. 13.104 − 17 =
14. 14.392 − 79 =
15. 15.303 − 19 =
16. 16.242 − 99 =
17. 17.507 − 56 =
18. 18.139 − 58 =
19. 19.333 − 28 =
20. 20.357 − 48 =
21. 21.199 − 56 =
22. 22.68 − 47 =
23. 23.112 − 56 =
24. 24.239 − 28 =
25. 25.166 − 96 =
26. 26.412 − 17 =
27. 27.181 − 66 =
28. 28.169 − 88 =
29. 29.544 − 96 =
30. 30.470 − 29 =
31. 31.182 − 17 =
32. 32.449 − 67 =
33. 33.506 − 16 =
34. 34.423 − 19 =
35. 35.96 − 39 =
36. 36.275 − 69 =
37. 37.380 − 26 =
38. 38.549 − 87 =
39. 39.195 − 99 =
40. 40.132 − 69 =

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