Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 183 · 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. 1.137 − 16 =
2. 2.133 − 67 =
3. 3.128 − 19 =
4. 4.345 − 78 =
5. 5.220 − 57 =
6. 6.269 − 66 =
7. 7.78 − 19 =
8. 8.458 − 36 =
9. 9.129 − 69 =
10. 10.272 − 38 =
11. 11.124 − 29 =
12. 12.153 − 67 =
13. 13.165 − 68 =
14. 14.125 − 87 =
15. 15.310 − 26 =
16. 16.174 − 99 =
17. 17.471 − 59 =
18. 18.300 − 36 =
19. 19.500 − 16 =
20. 20.408 − 97 =
21. 21.185 − 97 =
22. 22.277 − 39 =
23. 23.449 − 67 =
24. 24.528 − 87 =
25. 25.575 − 77 =
26. 26.299 − 87 =
27. 27.506 − 38 =
28. 28.147 − 57 =
29. 29.130 − 68 =
30. 30.518 − 87 =
31. 31.289 − 48 =
32. 32.118 − 18 =
33. 33.415 − 28 =
34. 34.213 − 78 =
35. 35.231 − 39 =
36. 36.66 − 28 =
37. 37.587 − 57 =
38. 38.526 − 89 =
39. 39.257 − 89 =
40. 40.237 − 16 =

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