Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 600 · 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. 1.382 − 19 =
2. 2.245 − 79 =
3. 3.510 − 66 =
4. 4.158 − 66 =
5. 5.449 − 99 =
6. 6.592 − 56 =
7. 7.397 − 27 =
8. 8.116 − 97 =
9. 9.62 − 16 =
10. 10.501 − 27 =
11. 11.185 − 47 =
12. 12.589 − 36 =
13. 13.56 − 46 =
14. 14.260 − 29 =
15. 15.326 − 66 =
16. 16.462 − 98 =
17. 17.574 − 79 =
18. 18.435 − 29 =
19. 19.565 − 76 =
20. 20.155 − 17 =
21. 21.222 − 56 =
22. 22.234 − 36 =
23. 23.361 − 69 =
24. 24.367 − 17 =
25. 25.586 − 27 =
26. 26.161 − 16 =
27. 27.67 − 18 =
28. 28.592 − 66 =
29. 29.367 − 57 =
30. 30.160 − 29 =
31. 31.473 − 36 =
32. 32.578 − 97 =
33. 33.305 − 16 =
34. 34.290 − 89 =
35. 35.300 − 99 =
36. 36.453 − 28 =
37. 37.525 − 79 =
38. 38.111 − 86 =
39. 39.473 − 19 =
40. 40.545 − 16 =

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