Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 390 · 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. 1.483 − 39 =
2. 2.484 − 86 =
3. 3.436 − 58 =
4. 4.434 − 86 =
5. 5.430 − 39 =
6. 6.488 − 48 =
7. 7.91 − 29 =
8. 8.524 − 36 =
9. 9.447 − 88 =
10. 10.183 − 48 =
11. 11.159 − 96 =
12. 12.557 − 58 =
13. 13.216 − 49 =
14. 14.142 − 28 =
15. 15.114 − 39 =
16. 16.229 − 16 =
17. 17.538 − 49 =
18. 18.228 − 78 =
19. 19.511 − 99 =
20. 20.222 − 59 =
21. 21.595 − 19 =
22. 22.567 − 58 =
23. 23.287 − 98 =
24. 24.375 − 28 =
25. 25.250 − 49 =
26. 26.589 − 47 =
27. 27.339 − 79 =
28. 28.368 − 69 =
29. 29.506 − 76 =
30. 30.110 − 18 =
31. 31.571 − 57 =
32. 32.209 − 86 =
33. 33.147 − 18 =
34. 34.362 − 28 =
35. 35.270 − 66 =
36. 36.248 − 46 =
37. 37.575 − 57 =
38. 38.134 − 77 =
39. 39.323 − 28 =
40. 40.570 − 16 =

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