Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 887 · 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. 1.472 − 89 =
2. 2.340 − 67 =
3. 3.521 − 66 =
4. 4.502 − 97 =
5. 5.367 − 58 =
6. 6.447 − 17 =
7. 7.368 − 58 =
8. 8.570 − 79 =
9. 9.541 − 99 =
10. 10.505 − 98 =
11. 11.215 − 87 =
12. 12.108 − 76 =
13. 13.474 − 99 =
14. 14.455 − 67 =
15. 15.185 − 19 =
16. 16.598 − 36 =
17. 17.421 − 47 =
18. 18.221 − 98 =
19. 19.254 − 29 =
20. 20.191 − 29 =
21. 21.448 − 97 =
22. 22.329 − 56 =
23. 23.351 − 28 =
24. 24.209 − 16 =
25. 25.399 − 96 =
26. 26.258 − 88 =
27. 27.548 − 19 =
28. 28.126 − 86 =
29. 29.163 − 69 =
30. 30.299 − 16 =
31. 31.183 − 69 =
32. 32.512 − 28 =
33. 33.158 − 88 =
34. 34.550 − 16 =
35. 35.252 − 88 =
36. 36.574 − 99 =
37. 37.112 − 87 =
38. 38.536 − 58 =
39. 39.193 − 48 =
40. 40.103 − 89 =

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