Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 970 · 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. 1.171 − 86 =
2. 2.271 − 76 =
3. 3.300 − 99 =
4. 4.306 − 96 =
5. 5.473 − 59 =
6. 6.284 − 87 =
7. 7.445 − 19 =
8. 8.314 − 58 =
9. 9.135 − 69 =
10. 10.386 − 78 =
11. 11.159 − 79 =
12. 12.431 − 99 =
13. 13.225 − 38 =
14. 14.380 − 78 =
15. 15.218 − 39 =
16. 16.212 − 77 =
17. 17.102 − 68 =
18. 18.531 − 38 =
19. 19.197 − 49 =
20. 20.73 − 36 =
21. 21.335 − 58 =
22. 22.363 − 37 =
23. 23.56 − 48 =
24. 24.391 − 77 =
25. 25.169 − 57 =
26. 26.172 − 76 =
27. 27.571 − 28 =
28. 28.556 − 19 =
29. 29.315 − 38 =
30. 30.245 − 47 =
31. 31.549 − 16 =
32. 32.231 − 67 =
33. 33.586 − 19 =
34. 34.271 − 29 =
35. 35.302 − 47 =
36. 36.364 − 89 =
37. 37.64 − 17 =
38. 38.442 − 68 =
39. 39.301 − 19 =
40. 40.238 − 19 =

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