Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 51 · 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. 1.464 − 77 =
2. 2.552 − 78 =
3. 3.571 − 18 =
4. 4.234 − 46 =
5. 5.363 − 46 =
6. 6.354 − 69 =
7. 7.399 − 87 =
8. 8.263 − 39 =
9. 9.118 − 77 =
10. 10.283 − 87 =
11. 11.449 − 98 =
12. 12.398 − 36 =
13. 13.576 − 16 =
14. 14.432 − 78 =
15. 15.592 − 48 =
16. 16.316 − 97 =
17. 17.246 − 47 =
18. 18.277 − 79 =
19. 19.183 − 87 =
20. 20.133 − 66 =
21. 21.492 − 29 =
22. 22.439 − 69 =
23. 23.498 − 28 =
24. 24.86 − 47 =
25. 25.335 − 29 =
26. 26.580 − 86 =
27. 27.315 − 36 =
28. 28.178 − 26 =
29. 29.246 − 39 =
30. 30.548 − 19 =
31. 31.171 − 17 =
32. 32.216 − 37 =
33. 33.126 − 69 =
34. 34.383 − 36 =
35. 35.103 − 98 =
36. 36.197 − 79 =
37. 37.367 − 76 =
38. 38.403 − 46 =
39. 39.231 − 18 =
40. 40.550 − 17 =

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