Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 880 · 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. 1.117 − 18 =
2. 2.297 − 36 =
3. 3.205 − 78 =
4. 4.220 − 46 =
5. 5.54 − 38 =
6. 6.130 − 67 =
7. 7.459 − 19 =
8. 8.537 − 68 =
9. 9.204 − 98 =
10. 10.104 − 49 =
11. 11.591 − 57 =
12. 12.475 − 26 =
13. 13.83 − 56 =
14. 14.475 − 58 =
15. 15.357 − 67 =
16. 16.483 − 86 =
17. 17.148 − 49 =
18. 18.573 − 59 =
19. 19.535 − 39 =
20. 20.498 − 97 =
21. 21.93 − 37 =
22. 22.265 − 37 =
23. 23.232 − 38 =
24. 24.171 − 87 =
25. 25.545 − 47 =
26. 26.219 − 59 =
27. 27.580 − 96 =
28. 28.131 − 28 =
29. 29.581 − 87 =
30. 30.458 − 26 =
31. 31.235 − 16 =
32. 32.417 − 38 =
33. 33.228 − 29 =
34. 34.338 − 57 =
35. 35.496 − 66 =
36. 36.190 − 49 =
37. 37.128 − 97 =
38. 38.398 − 27 =
39. 39.151 − 29 =
40. 40.540 − 88 =

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