Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 79 · 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. 1.308 − 98 =
2. 2.119 − 77 =
3. 3.115 − 67 =
4. 4.395 − 16 =
5. 5.407 − 46 =
6. 6.275 − 47 =
7. 7.129 − 19 =
8. 8.407 − 29 =
9. 9.246 − 56 =
10. 10.449 − 76 =
11. 11.257 − 17 =
12. 12.489 − 78 =
13. 13.253 − 27 =
14. 14.388 − 59 =
15. 15.556 − 57 =
16. 16.276 − 58 =
17. 17.584 − 48 =
18. 18.451 − 87 =
19. 19.439 − 98 =
20. 20.107 − 27 =
21. 21.165 − 79 =
22. 22.304 − 79 =
23. 23.377 − 27 =
24. 24.231 − 86 =
25. 25.279 − 17 =
26. 26.150 − 77 =
27. 27.461 − 56 =
28. 28.554 − 36 =
29. 29.228 − 46 =
30. 30.441 − 86 =
31. 31.201 − 87 =
32. 32.534 − 58 =
33. 33.370 − 38 =
34. 34.287 − 79 =
35. 35.156 − 68 =
36. 36.461 − 96 =
37. 37.245 − 76 =
38. 38.221 − 49 =
39. 39.418 − 28 =
40. 40.165 − 67 =

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