Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 646 · 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. 1.210 − 47 =
2. 2.147 − 39 =
3. 3.335 − 29 =
4. 4.273 − 78 =
5. 5.382 − 37 =
6. 6.127 − 79 =
7. 7.100 − 68 =
8. 8.541 − 28 =
9. 9.232 − 78 =
10. 10.292 − 98 =
11. 11.314 − 19 =
12. 12.121 − 27 =
13. 13.178 − 86 =
14. 14.211 − 16 =
15. 15.105 − 17 =
16. 16.363 − 87 =
17. 17.572 − 96 =
18. 18.454 − 99 =
19. 19.521 − 16 =
20. 20.493 − 17 =
21. 21.108 − 49 =
22. 22.71 − 18 =
23. 23.330 − 29 =
24. 24.176 − 97 =
25. 25.399 − 16 =
26. 26.522 − 17 =
27. 27.163 − 97 =
28. 28.555 − 28 =
29. 29.159 − 68 =
30. 30.128 − 76 =
31. 31.535 − 49 =
32. 32.326 − 98 =
33. 33.490 − 17 =
34. 34.183 − 87 =
35. 35.514 − 67 =
36. 36.276 − 96 =
37. 37.352 − 77 =
38. 38.110 − 56 =
39. 39.546 − 17 =
40. 40.98 − 19 =

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