Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 726 · 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. 1.159 − 28 =
2. 2.187 − 67 =
3. 3.123 − 28 =
4. 4.176 − 17 =
5. 5.436 − 78 =
6. 6.276 − 37 =
7. 7.343 − 96 =
8. 8.347 − 48 =
9. 9.407 − 16 =
10. 10.419 − 36 =
11. 11.341 − 28 =
12. 12.407 − 79 =
13. 13.504 − 39 =
14. 14.209 − 59 =
15. 15.238 − 57 =
16. 16.252 − 57 =
17. 17.301 − 48 =
18. 18.513 − 38 =
19. 19.561 − 19 =
20. 20.180 − 98 =
21. 21.104 − 36 =
22. 22.285 − 16 =
23. 23.450 − 18 =
24. 24.179 − 46 =
25. 25.102 − 58 =
26. 26.118 − 68 =
27. 27.216 − 37 =
28. 28.536 − 87 =
29. 29.236 − 58 =
30. 30.312 − 36 =
31. 31.138 − 17 =
32. 32.428 − 98 =
33. 33.130 − 27 =
34. 34.328 − 39 =
35. 35.454 − 29 =
36. 36.512 − 36 =
37. 37.120 − 37 =
38. 38.381 − 27 =
39. 39.518 − 36 =
40. 40.165 − 17 =

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