Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 815 · 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. 1.588 − 27 =
2. 2.258 − 17 =
3. 3.264 − 69 =
4. 4.595 − 69 =
5. 5.472 − 88 =
6. 6.542 − 98 =
7. 7.483 − 46 =
8. 8.532 − 48 =
9. 9.347 − 96 =
10. 10.174 − 36 =
11. 11.458 − 16 =
12. 12.540 − 18 =
13. 13.581 − 98 =
14. 14.153 − 96 =
15. 15.489 − 16 =
16. 16.198 − 39 =
17. 17.420 − 89 =
18. 18.518 − 48 =
19. 19.296 − 96 =
20. 20.279 − 37 =
21. 21.440 − 78 =
22. 22.429 − 58 =
23. 23.143 − 58 =
24. 24.380 − 67 =
25. 25.144 − 19 =
26. 26.577 − 56 =
27. 27.340 − 59 =
28. 28.547 − 67 =
29. 29.387 − 46 =
30. 30.112 − 48 =
31. 31.153 − 98 =
32. 32.113 − 36 =
33. 33.383 − 56 =
34. 34.201 − 86 =
35. 35.197 − 36 =
36. 36.226 − 27 =
37. 37.476 − 29 =
38. 38.199 − 36 =
39. 39.324 − 58 =
40. 40.592 − 26 =

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