Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 31 · 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. 1.123 − 16 =
2. 2.183 − 88 =
3. 3.436 − 88 =
4. 4.540 − 79 =
5. 5.171 − 39 =
6. 6.161 − 68 =
7. 7.350 − 47 =
8. 8.523 − 27 =
9. 9.331 − 96 =
10. 10.387 − 67 =
11. 11.106 − 38 =
12. 12.213 − 79 =
13. 13.440 − 89 =
14. 14.157 − 18 =
15. 15.367 − 39 =
16. 16.168 − 56 =
17. 17.355 − 26 =
18. 18.89 − 18 =
19. 19.162 − 57 =
20. 20.287 − 87 =
21. 21.123 − 26 =
22. 22.562 − 16 =
23. 23.238 − 58 =
24. 24.462 − 57 =
25. 25.103 − 26 =
26. 26.124 − 68 =
27. 27.310 − 38 =
28. 28.311 − 58 =
29. 29.203 − 28 =
30. 30.223 − 36 =
31. 31.378 − 88 =
32. 32.302 − 76 =
33. 33.451 − 16 =
34. 34.560 − 19 =
35. 35.173 − 98 =
36. 36.166 − 19 =
37. 37.352 − 78 =
38. 38.452 − 36 =
39. 39.567 − 48 =
40. 40.383 − 88 =

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