Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 420 · 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. 1.294 − 29 =
2. 2.495 − 48 =
3. 3.82 − 29 =
4. 4.167 − 86 =
5. 5.299 − 96 =
6. 6.176 − 97 =
7. 7.541 − 17 =
8. 8.258 − 18 =
9. 9.547 − 66 =
10. 10.137 − 37 =
11. 11.152 − 67 =
12. 12.310 − 39 =
13. 13.249 − 56 =
14. 14.548 − 96 =
15. 15.311 − 66 =
16. 16.193 − 88 =
17. 17.167 − 16 =
18. 18.535 − 39 =
19. 19.175 − 26 =
20. 20.464 − 19 =
21. 21.162 − 67 =
22. 22.207 − 77 =
23. 23.299 − 36 =
24. 24.242 − 38 =
25. 25.404 − 38 =
26. 26.270 − 28 =
27. 27.479 − 99 =
28. 28.433 − 39 =
29. 29.391 − 88 =
30. 30.195 − 27 =
31. 31.99 − 16 =
32. 32.59 − 39 =
33. 33.185 − 97 =
34. 34.384 − 69 =
35. 35.599 − 69 =
36. 36.441 − 17 =
37. 37.351 − 68 =
38. 38.503 − 77 =
39. 39.490 − 96 =
40. 40.173 − 19 =

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