Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 993 · 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. 1.98 − 18 =
2. 2.510 − 79 =
3. 3.359 − 97 =
4. 4.57 − 47 =
5. 5.255 − 46 =
6. 6.413 − 87 =
7. 7.410 − 56 =
8. 8.596 − 59 =
9. 9.300 − 46 =
10. 10.428 − 16 =
11. 11.171 − 59 =
12. 12.92 − 59 =
13. 13.414 − 47 =
14. 14.369 − 98 =
15. 15.255 − 19 =
16. 16.323 − 28 =
17. 17.548 − 16 =
18. 18.495 − 17 =
19. 19.294 − 78 =
20. 20.187 − 36 =
21. 21.74 − 16 =
22. 22.522 − 77 =
23. 23.588 − 58 =
24. 24.184 − 69 =
25. 25.437 − 39 =
26. 26.570 − 78 =
27. 27.556 − 66 =
28. 28.110 − 48 =
29. 29.257 − 87 =
30. 30.244 − 47 =
31. 31.77 − 28 =
32. 32.519 − 66 =
33. 33.213 − 87 =
34. 34.227 − 76 =
35. 35.433 − 47 =
36. 36.112 − 36 =
37. 37.215 − 69 =
38. 38.572 − 36 =
39. 39.451 − 46 =
40. 40.585 − 69 =

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