Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 552 · 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. 1.193 − 89 =
2. 2.163 − 18 =
3. 3.436 − 46 =
4. 4.569 − 49 =
5. 5.77 − 29 =
6. 6.378 − 29 =
7. 7.440 − 16 =
8. 8.589 − 28 =
9. 9.558 − 59 =
10. 10.128 − 87 =
11. 11.209 − 88 =
12. 12.387 − 19 =
13. 13.191 − 68 =
14. 14.134 − 59 =
15. 15.438 − 29 =
16. 16.549 − 78 =
17. 17.144 − 66 =
18. 18.259 − 17 =
19. 19.57 − 49 =
20. 20.229 − 19 =
21. 21.402 − 66 =
22. 22.151 − 19 =
23. 23.405 − 47 =
24. 24.529 − 57 =
25. 25.515 − 69 =
26. 26.323 − 19 =
27. 27.594 − 46 =
28. 28.248 − 36 =
29. 29.451 − 16 =
30. 30.361 − 98 =
31. 31.577 − 69 =
32. 32.175 − 87 =
33. 33.165 − 96 =
34. 34.214 − 78 =
35. 35.221 − 46 =
36. 36.166 − 86 =
37. 37.140 − 66 =
38. 38.574 − 86 =
39. 39.598 − 59 =
40. 40.153 − 36 =

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