Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 490 · 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. 1.109 − 46 =
2. 2.270 − 78 =
3. 3.80 − 17 =
4. 4.99 − 58 =
5. 5.421 − 29 =
6. 6.459 − 48 =
7. 7.433 − 19 =
8. 8.436 − 36 =
9. 9.597 − 17 =
10. 10.144 − 88 =
11. 11.422 − 26 =
12. 12.238 − 86 =
13. 13.481 − 68 =
14. 14.290 − 17 =
15. 15.458 − 77 =
16. 16.520 − 56 =
17. 17.154 − 38 =
18. 18.172 − 47 =
19. 19.214 − 76 =
20. 20.238 − 97 =
21. 21.524 − 48 =
22. 22.379 − 86 =
23. 23.159 − 99 =
24. 24.342 − 87 =
25. 25.240 − 78 =
26. 26.69 − 26 =
27. 27.363 − 58 =
28. 28.68 − 38 =
29. 29.337 − 59 =
30. 30.547 − 49 =
31. 31.421 − 87 =
32. 32.486 − 59 =
33. 33.208 − 59 =
34. 34.64 − 27 =
35. 35.205 − 16 =
36. 36.355 − 29 =
37. 37.90 − 86 =
38. 38.508 − 29 =
39. 39.162 − 87 =
40. 40.167 − 66 =

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