Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 435 · 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. 1.346 − 79 =
2. 2.481 − 66 =
3. 3.309 − 39 =
4. 4.330 − 66 =
5. 5.541 − 57 =
6. 6.80 − 29 =
7. 7.469 − 46 =
8. 8.124 − 97 =
9. 9.168 − 48 =
10. 10.388 − 47 =
11. 11.115 − 19 =
12. 12.526 − 26 =
13. 13.215 − 19 =
14. 14.195 − 49 =
15. 15.485 − 29 =
16. 16.567 − 48 =
17. 17.240 − 57 =
18. 18.373 − 36 =
19. 19.356 − 38 =
20. 20.431 − 48 =
21. 21.148 − 76 =
22. 22.511 − 96 =
23. 23.404 − 27 =
24. 24.120 − 17 =
25. 25.461 − 36 =
26. 26.513 − 97 =
27. 27.250 − 47 =
28. 28.493 − 36 =
29. 29.140 − 69 =
30. 30.257 − 46 =
31. 31.332 − 18 =
32. 32.379 − 18 =
33. 33.284 − 36 =
34. 34.578 − 27 =
35. 35.291 − 18 =
36. 36.271 − 79 =
37. 37.178 − 27 =
38. 38.513 − 86 =
39. 39.341 − 26 =
40. 40.142 − 66 =

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