Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 172 · 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. 1.591 − 16 =
2. 2.155 − 49 =
3. 3.84 − 47 =
4. 4.577 − 59 =
5. 5.509 − 56 =
6. 6.483 − 78 =
7. 7.315 − 37 =
8. 8.365 − 79 =
9. 9.95 − 48 =
10. 10.448 − 16 =
11. 11.502 − 18 =
12. 12.208 − 37 =
13. 13.310 − 28 =
14. 14.201 − 26 =
15. 15.549 − 68 =
16. 16.549 − 26 =
17. 17.302 − 48 =
18. 18.169 − 18 =
19. 19.111 − 36 =
20. 20.342 − 98 =
21. 21.496 − 76 =
22. 22.568 − 17 =
23. 23.537 − 68 =
24. 24.162 − 68 =
25. 25.176 − 29 =
26. 26.166 − 88 =
27. 27.74 − 59 =
28. 28.539 − 26 =
29. 29.425 − 28 =
30. 30.394 − 17 =
31. 31.82 − 28 =
32. 32.98 − 38 =
33. 33.436 − 87 =
34. 34.500 − 56 =
35. 35.595 − 37 =
36. 36.515 − 28 =
37. 37.154 − 79 =
38. 38.216 − 37 =
39. 39.493 − 67 =
40. 40.452 − 16 =

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