Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 685 · 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. 1.240 − 79 =
2. 2.104 − 89 =
3. 3.350 − 76 =
4. 4.510 − 77 =
5. 5.305 − 28 =
6. 6.333 − 56 =
7. 7.365 − 28 =
8. 8.433 − 86 =
9. 9.543 − 29 =
10. 10.369 − 66 =
11. 11.301 − 58 =
12. 12.348 − 68 =
13. 13.176 − 19 =
14. 14.581 − 68 =
15. 15.152 − 89 =
16. 16.389 − 99 =
17. 17.181 − 59 =
18. 18.585 − 37 =
19. 19.177 − 37 =
20. 20.541 − 18 =
21. 21.135 − 19 =
22. 22.85 − 68 =
23. 23.421 − 76 =
24. 24.319 − 68 =
25. 25.70 − 59 =
26. 26.357 − 96 =
27. 27.249 − 16 =
28. 28.232 − 17 =
29. 29.256 − 46 =
30. 30.271 − 19 =
31. 31.292 − 48 =
32. 32.176 − 69 =
33. 33.99 − 88 =
34. 34.235 − 16 =
35. 35.485 − 57 =
36. 36.97 − 46 =
37. 37.212 − 79 =
38. 38.502 − 66 =
39. 39.281 − 67 =
40. 40.270 − 16 =

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