Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 645 · 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. 1.130 − 59 =
2. 2.252 − 46 =
3. 3.483 − 78 =
4. 4.152 − 89 =
5. 5.341 − 67 =
6. 6.89 − 57 =
7. 7.518 − 29 =
8. 8.313 − 87 =
9. 9.430 − 56 =
10. 10.262 − 97 =
11. 11.139 − 29 =
12. 12.417 − 86 =
13. 13.254 − 87 =
14. 14.230 − 16 =
15. 15.475 − 66 =
16. 16.316 − 66 =
17. 17.147 − 36 =
18. 18.292 − 58 =
19. 19.166 − 79 =
20. 20.343 − 27 =
21. 21.240 − 58 =
22. 22.315 − 98 =
23. 23.506 − 97 =
24. 24.297 − 19 =
25. 25.441 − 77 =
26. 26.471 − 67 =
27. 27.65 − 48 =
28. 28.121 − 99 =
29. 29.188 − 18 =
30. 30.488 − 48 =
31. 31.54 − 36 =
32. 32.100 − 97 =
33. 33.110 − 47 =
34. 34.546 − 68 =
35. 35.452 − 79 =
36. 36.334 − 66 =
37. 37.152 − 69 =
38. 38.328 − 47 =
39. 39.159 − 97 =
40. 40.488 − 18 =

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