Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 329 · 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. 1.561 − 68 =
2. 2.321 − 66 =
3. 3.366 − 28 =
4. 4.101 − 39 =
5. 5.413 − 49 =
6. 6.309 − 28 =
7. 7.184 − 19 =
8. 8.75 − 16 =
9. 9.298 − 39 =
10. 10.394 − 27 =
11. 11.261 − 98 =
12. 12.169 − 78 =
13. 13.193 − 69 =
14. 14.160 − 97 =
15. 15.415 − 86 =
16. 16.234 − 29 =
17. 17.376 − 16 =
18. 18.166 − 38 =
19. 19.140 − 49 =
20. 20.363 − 17 =
21. 21.379 − 17 =
22. 22.247 − 29 =
23. 23.574 − 49 =
24. 24.197 − 37 =
25. 25.110 − 36 =
26. 26.207 − 17 =
27. 27.399 − 99 =
28. 28.440 − 48 =
29. 29.324 − 19 =
30. 30.454 − 87 =
31. 31.484 − 98 =
32. 32.265 − 26 =
33. 33.182 − 18 =
34. 34.445 − 29 =
35. 35.572 − 49 =
36. 36.429 − 28 =
37. 37.161 − 98 =
38. 38.124 − 99 =
39. 39.217 − 87 =
40. 40.346 − 78 =

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