Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 133 · 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. 1.304 − 29 =
2. 2.499 − 28 =
3. 3.524 − 19 =
4. 4.425 − 17 =
5. 5.144 − 19 =
6. 6.114 − 79 =
7. 7.199 − 48 =
8. 8.292 − 29 =
9. 9.300 − 17 =
10. 10.176 − 99 =
11. 11.542 − 49 =
12. 12.124 − 19 =
13. 13.578 − 76 =
14. 14.454 − 57 =
15. 15.91 − 27 =
16. 16.245 − 29 =
17. 17.486 − 26 =
18. 18.333 − 19 =
19. 19.252 − 99 =
20. 20.392 − 58 =
21. 21.463 − 28 =
22. 22.597 − 76 =
23. 23.334 − 26 =
24. 24.554 − 86 =
25. 25.561 − 96 =
26. 26.407 − 29 =
27. 27.584 − 96 =
28. 28.380 − 29 =
29. 29.429 − 88 =
30. 30.307 − 37 =
31. 31.529 − 97 =
32. 32.326 − 49 =
33. 33.113 − 38 =
34. 34.330 − 47 =
35. 35.303 − 79 =
36. 36.519 − 37 =
37. 37.338 − 16 =
38. 38.132 − 79 =
39. 39.239 − 18 =
40. 40.88 − 39 =

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