Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 223 · 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. 1.122 − 17 =
2. 2.133 − 66 =
3. 3.434 − 98 =
4. 4.149 − 57 =
5. 5.534 − 27 =
6. 6.292 − 77 =
7. 7.283 − 66 =
8. 8.548 − 36 =
9. 9.531 − 26 =
10. 10.161 − 16 =
11. 11.449 − 38 =
12. 12.219 − 16 =
13. 13.550 − 68 =
14. 14.88 − 69 =
15. 15.67 − 27 =
16. 16.359 − 78 =
17. 17.71 − 18 =
18. 18.343 − 16 =
19. 19.142 − 59 =
20. 20.528 − 39 =
21. 21.185 − 56 =
22. 22.315 − 48 =
23. 23.422 − 76 =
24. 24.543 − 87 =
25. 25.427 − 57 =
26. 26.579 − 17 =
27. 27.109 − 68 =
28. 28.185 − 96 =
29. 29.513 − 67 =
30. 30.389 − 68 =
31. 31.364 − 18 =
32. 32.277 − 36 =
33. 33.590 − 29 =
34. 34.359 − 18 =
35. 35.597 − 36 =
36. 36.281 − 39 =
37. 37.417 − 39 =
38. 38.75 − 39 =
39. 39.448 − 97 =
40. 40.178 − 78 =

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