Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 855 · 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. 1.129 − 29 =
2. 2.433 − 99 =
3. 3.69 − 47 =
4. 4.343 − 19 =
5. 5.232 − 17 =
6. 6.596 − 18 =
7. 7.547 − 36 =
8. 8.87 − 57 =
9. 9.493 − 28 =
10. 10.504 − 16 =
11. 11.392 − 27 =
12. 12.553 − 79 =
13. 13.88 − 17 =
14. 14.216 − 78 =
15. 15.250 − 87 =
16. 16.217 − 18 =
17. 17.350 − 68 =
18. 18.508 − 69 =
19. 19.167 − 29 =
20. 20.160 − 78 =
21. 21.220 − 47 =
22. 22.528 − 49 =
23. 23.284 − 36 =
24. 24.365 − 16 =
25. 25.81 − 28 =
26. 26.160 − 67 =
27. 27.484 − 56 =
28. 28.395 − 37 =
29. 29.482 − 48 =
30. 30.368 − 59 =
31. 31.509 − 37 =
32. 32.172 − 29 =
33. 33.125 − 86 =
34. 34.237 − 37 =
35. 35.143 − 59 =
36. 36.474 − 28 =
37. 37.106 − 37 =
38. 38.344 − 68 =
39. 39.503 − 39 =
40. 40.140 − 26 =

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