Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 415 · 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. 1.221 − 29 =
2. 2.104 − 57 =
3. 3.158 − 99 =
4. 4.581 − 48 =
5. 5.356 − 27 =
6. 6.189 − 87 =
7. 7.466 − 38 =
8. 8.461 − 96 =
9. 9.223 − 58 =
10. 10.244 − 58 =
11. 11.193 − 57 =
12. 12.498 − 37 =
13. 13.487 − 66 =
14. 14.127 − 36 =
15. 15.120 − 18 =
16. 16.539 − 46 =
17. 17.365 − 27 =
18. 18.289 − 77 =
19. 19.346 − 68 =
20. 20.216 − 27 =
21. 21.231 − 16 =
22. 22.578 − 76 =
23. 23.542 − 38 =
24. 24.242 − 79 =
25. 25.69 − 38 =
26. 26.291 − 97 =
27. 27.438 − 37 =
28. 28.379 − 66 =
29. 29.521 − 98 =
30. 30.132 − 28 =
31. 31.132 − 66 =
32. 32.420 − 19 =
33. 33.389 − 96 =
34. 34.75 − 56 =
35. 35.441 − 47 =
36. 36.532 − 76 =
37. 37.342 − 87 =
38. 38.389 − 69 =
39. 39.246 − 78 =
40. 40.434 − 17 =

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