Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 311 · 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. 1.490 − 18 =
2. 2.227 − 27 =
3. 3.216 − 36 =
4. 4.349 − 77 =
5. 5.587 − 88 =
6. 6.168 − 79 =
7. 7.149 − 96 =
8. 8.549 − 68 =
9. 9.498 − 96 =
10. 10.561 − 47 =
11. 11.100 − 56 =
12. 12.263 − 98 =
13. 13.272 − 99 =
14. 14.258 − 99 =
15. 15.251 − 48 =
16. 16.562 − 16 =
17. 17.563 − 29 =
18. 18.305 − 96 =
19. 19.356 − 86 =
20. 20.274 − 29 =
21. 21.363 − 17 =
22. 22.139 − 69 =
23. 23.542 − 66 =
24. 24.127 − 96 =
25. 25.110 − 86 =
26. 26.592 − 28 =
27. 27.347 − 97 =
28. 28.179 − 87 =
29. 29.597 − 77 =
30. 30.490 − 59 =
31. 31.479 − 99 =
32. 32.577 − 67 =
33. 33.571 − 96 =
34. 34.541 − 76 =
35. 35.263 − 58 =
36. 36.456 − 46 =
37. 37.52 − 16 =
38. 38.340 − 98 =
39. 39.451 − 56 =
40. 40.373 − 79 =

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