Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 128 · 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. 1.275 − 29 =
2. 2.514 − 18 =
3. 3.132 − 77 =
4. 4.253 − 47 =
5. 5.469 − 59 =
6. 6.380 − 57 =
7. 7.541 − 28 =
8. 8.281 − 48 =
9. 9.282 − 46 =
10. 10.490 − 99 =
11. 11.431 − 37 =
12. 12.90 − 76 =
13. 13.564 − 47 =
14. 14.561 − 37 =
15. 15.270 − 99 =
16. 16.204 − 66 =
17. 17.530 − 26 =
18. 18.92 − 57 =
19. 19.482 − 49 =
20. 20.332 − 86 =
21. 21.429 − 27 =
22. 22.434 − 98 =
23. 23.232 − 17 =
24. 24.124 − 79 =
25. 25.82 − 27 =
26. 26.582 − 19 =
27. 27.500 − 17 =
28. 28.116 − 17 =
29. 29.243 − 59 =
30. 30.541 − 76 =
31. 31.510 − 69 =
32. 32.152 − 59 =
33. 33.95 − 18 =
34. 34.133 − 29 =
35. 35.257 − 97 =
36. 36.504 − 66 =
37. 37.70 − 49 =
38. 38.93 − 48 =
39. 39.353 − 66 =
40. 40.147 − 47 =

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