Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 28 · 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. 1.375 − 68 =
2. 2.84 − 49 =
3. 3.584 − 79 =
4. 4.247 − 47 =
5. 5.402 − 46 =
6. 6.551 − 26 =
7. 7.167 − 76 =
8. 8.105 − 26 =
9. 9.142 − 29 =
10. 10.352 − 69 =
11. 11.480 − 88 =
12. 12.450 − 26 =
13. 13.207 − 29 =
14. 14.298 − 68 =
15. 15.129 − 38 =
16. 16.364 − 28 =
17. 17.140 − 58 =
18. 18.76 − 47 =
19. 19.528 − 38 =
20. 20.265 − 87 =
21. 21.151 − 29 =
22. 22.496 − 17 =
23. 23.137 − 59 =
24. 24.111 − 46 =
25. 25.425 − 56 =
26. 26.362 − 96 =
27. 27.462 − 78 =
28. 28.419 − 77 =
29. 29.139 − 69 =
30. 30.376 − 38 =
31. 31.229 − 48 =
32. 32.537 − 96 =
33. 33.301 − 36 =
34. 34.160 − 86 =
35. 35.404 − 57 =
36. 36.556 − 56 =
37. 37.156 − 56 =
38. 38.454 − 68 =
39. 39.243 − 86 =
40. 40.255 − 86 =

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