Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 635 · 40 questions

The trick (Count the places): Forget the points and multiply the whole numbers. Count all the digits after the points in the question. Put the point that many places from the right, then check by rounding.

1. 1.5.9 × 0.7 — where does the decimal point go? (a) 0.0413 (b) 4.13 (c) 41.3 (d) 0.413
2. 2.1.9 × 11 — where does the decimal point go? (a) 0.209 (b) 2.09 (c) 209 (d) 20.9
3. 3.0.31 × 4.1 — where does the decimal point go? (a) 1.271 (b) 0.1271 (c) 0.01271 (d) 12.71
4. 4.1.2 × 3 — where does the decimal point go? (a) 0.036 (b) 0.36 (c) 3.6 (d) 36
5. 5.0.78 × 49 — where does the decimal point go? (a) 3.822 (b) 382.2 (c) 38.22 (d) 0.3822
6. 6.0.16 × 6 — where does the decimal point go? (a) 0.096 (b) 0.96 (c) 0.0096 (d) 9.6
7. 7.0.73 × 7 — where does the decimal point go? (a) 51.1 (b) 5.11 (c) 0.511 (d) 0.0511
8. 8.6.9 × 1.2 — where does the decimal point go? (a) 8.28 (b) 0.0828 (c) 82.8 (d) 0.828
9. 9.0.77 × 9 — where does the decimal point go? (a) 6.93 (b) 0.693 (c) 0.0693 (d) 69.3
10. 10.1.6 × 4.3 — where does the decimal point go? (a) 68.8 (b) 6.88 (c) 0.688 (d) 0.0688
11. 11.3.3 × 1.1 — where does the decimal point go? (a) 0.363 (b) 0.0363 (c) 36.3 (d) 3.63
12. 12.2.8 × 31 — where does the decimal point go? (a) 0.868 (b) 868 (c) 86.8 (d) 8.68
13. 13.6.5 × 1.9 — where does the decimal point go? (a) 0.1235 (b) 12.35 (c) 123.5 (d) 1.235
14. 14.4.7 × 2.9 — where does the decimal point go? (a) 0.1363 (b) 1.363 (c) 136.3 (d) 13.63
15. 15.3.9 × 5 — where does the decimal point go? (a) 19.5 (b) 195 (c) 0.195 (d) 1.95
16. 16.7.1 × 4 — where does the decimal point go? (a) 28.4 (b) 2.84 (c) 284 (d) 0.284
17. 17.0.19 × 0.5 — where does the decimal point go? (a) 0.00095 (b) 0.95 (c) 0.0095 (d) 0.095
18. 18.2.4 × 0.9 — where does the decimal point go? (a) 0.216 (b) 21.6 (c) 0.0216 (d) 2.16
19. 19.1.8 × 4 — where does the decimal point go? (a) 72 (b) 7.2 (c) 0.72 (d) 0.072
20. 20.0.66 × 3.2 — where does the decimal point go? (a) 2.112 (b) 0.02112 (c) 0.2112 (d) 21.12
21. 21.1.4 × 0.2 — where does the decimal point go? (a) 0.0028 (b) 0.028 (c) 0.28 (d) 2.8
22. 22.2.7 × 2 — where does the decimal point go? (a) 0.54 (b) 54 (c) 0.054 (d) 5.4
23. 23.2.6 × 6 — where does the decimal point go? (a) 0.156 (b) 1.56 (c) 15.6 (d) 156
24. 24.2.3 × 8 — where does the decimal point go? (a) 0.184 (b) 184 (c) 18.4 (d) 1.84
25. 25.0.78 × 0.9 — where does the decimal point go? (a) 7.02 (b) 0.0702 (c) 0.702 (d) 0.00702
26. 26.0.44 × 0.4 — where does the decimal point go? (a) 0.0176 (b) 0.176 (c) 1.76 (d) 0.00176
27. 27.8.8 × 41 — where does the decimal point go? (a) 3.608 (b) 360.8 (c) 36.08 (d) 3608
28. 28.7.7 × 9 — where does the decimal point go? (a) 0.693 (b) 6.93 (c) 69.3 (d) 693
29. 29.3.7 × 2 — where does the decimal point go? (a) 0.074 (b) 74 (c) 7.4 (d) 0.74
30. 30.2.4 × 0.2 — where does the decimal point go? (a) 0.048 (b) 0.48 (c) 4.8 (d) 0.0048
31. 31.0.64 × 7 — where does the decimal point go? (a) 0.448 (b) 44.8 (c) 0.0448 (d) 4.48
32. 32.4.4 × 0.4 — where does the decimal point go? (a) 1.76 (b) 0.176 (c) 0.0176 (d) 17.6
33. 33.9.5 × 0.5 — where does the decimal point go? (a) 4.75 (b) 0.0475 (c) 0.475 (d) 47.5
34. 34.3.1 × 2.8 — where does the decimal point go? (a) 86.8 (b) 8.68 (c) 0.0868 (d) 0.868
35. 35.2.7 × 0.4 — where does the decimal point go? (a) 0.0108 (b) 10.8 (c) 0.108 (d) 1.08
36. 36.0.52 × 0.6 — where does the decimal point go? (a) 0.00312 (b) 3.12 (c) 0.0312 (d) 0.312
37. 37.7.1 × 15 — where does the decimal point go? (a) 10.65 (b) 106.5 (c) 1.065 (d) 1065
38. 38.5.8 × 0.7 — where does the decimal point go? (a) 0.406 (b) 0.0406 (c) 4.06 (d) 40.6
39. 39.3.4 × 22 — where does the decimal point go? (a) 0.748 (b) 74.8 (c) 748 (d) 7.48
40. 40.0.98 × 9 — where does the decimal point go? (a) 8.82 (b) 0.882 (c) 0.0882 (d) 88.2

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