Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 690 · 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. 1.508 − 18 =
2. 2.454 − 57 =
3. 3.504 − 46 =
4. 4.364 − 36 =
5. 5.482 − 56 =
6. 6.518 − 56 =
7. 7.384 − 87 =
8. 8.177 − 66 =
9. 9.176 − 46 =
10. 10.473 − 48 =
11. 11.426 − 79 =
12. 12.484 − 58 =
13. 13.445 − 18 =
14. 14.144 − 27 =
15. 15.74 − 37 =
16. 16.330 − 17 =
17. 17.494 − 56 =
18. 18.526 − 47 =
19. 19.402 − 88 =
20. 20.91 − 76 =
21. 21.234 − 17 =
22. 22.249 − 17 =
23. 23.243 − 88 =
24. 24.206 − 69 =
25. 25.324 − 28 =
26. 26.71 − 66 =
27. 27.170 − 37 =
28. 28.406 − 18 =
29. 29.396 − 16 =
30. 30.203 − 36 =
31. 31.188 − 39 =
32. 32.396 − 58 =
33. 33.314 − 18 =
34. 34.406 − 28 =
35. 35.89 − 57 =
36. 36.409 − 18 =
37. 37.224 − 16 =
38. 38.156 − 26 =
39. 39.313 − 18 =
40. 40.197 − 59 =

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