Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 18 · 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. 1.565 − 36 =
2. 2.517 − 49 =
3. 3.486 − 28 =
4. 4.282 − 69 =
5. 5.420 − 29 =
6. 6.178 − 78 =
7. 7.253 − 39 =
8. 8.471 − 68 =
9. 9.566 − 26 =
10. 10.155 − 27 =
11. 11.521 − 36 =
12. 12.502 − 48 =
13. 13.152 − 86 =
14. 14.574 − 89 =
15. 15.312 − 89 =
16. 16.60 − 36 =
17. 17.123 − 26 =
18. 18.205 − 77 =
19. 19.404 − 66 =
20. 20.245 − 38 =
21. 21.104 − 19 =
22. 22.495 − 69 =
23. 23.378 − 89 =
24. 24.127 − 28 =
25. 25.199 − 59 =
26. 26.244 − 19 =
27. 27.317 − 77 =
28. 28.346 − 37 =
29. 29.143 − 88 =
30. 30.490 − 26 =
31. 31.579 − 97 =
32. 32.330 − 97 =
33. 33.271 − 26 =
34. 34.120 − 47 =
35. 35.586 − 18 =
36. 36.157 − 28 =
37. 37.384 − 97 =
38. 38.409 − 97 =
39. 39.512 − 49 =
40. 40.458 − 49 =

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