Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 559 · 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. 1.2.7 × 3 — where does the decimal point go? (a) 0.081 (b) 8.1 (c) 81 (d) 0.81
2. 2.0.61 × 28 — where does the decimal point go? (a) 0.1708 (b) 17.08 (c) 170.8 (d) 1.708
3. 3.0.44 × 2 — where does the decimal point go? (a) 0.88 (b) 0.088 (c) 0.0088 (d) 8.8
4. 4.8.9 × 0.7 — where does the decimal point go? (a) 0.0623 (b) 62.3 (c) 6.23 (d) 0.623
5. 5.0.45 × 1.1 — where does the decimal point go? (a) 0.0495 (b) 0.495 (c) 4.95 (d) 0.00495
6. 6.1.2 × 39 — where does the decimal point go? (a) 0.468 (b) 46.8 (c) 468 (d) 4.68
7. 7.2.5 × 0.7 — where does the decimal point go? (a) 1.75 (b) 0.175 (c) 0.0175 (d) 17.5
8. 8.0.55 × 0.3 — where does the decimal point go? (a) 0.00165 (b) 0.0165 (c) 0.165 (d) 1.65
9. 9.1.9 × 11 — where does the decimal point go? (a) 2.09 (b) 209 (c) 20.9 (d) 0.209
10. 10.9.5 × 4.7 — where does the decimal point go? (a) 446.5 (b) 4.465 (c) 0.4465 (d) 44.65
11. 11.0.38 × 4 — where does the decimal point go? (a) 15.2 (b) 1.52 (c) 0.0152 (d) 0.152
12. 12.1.9 × 3.6 — where does the decimal point go? (a) 0.0684 (b) 0.684 (c) 68.4 (d) 6.84
13. 13.0.47 × 1.3 — where does the decimal point go? (a) 0.0611 (b) 0.00611 (c) 0.611 (d) 6.11
14. 14.0.17 × 0.3 — where does the decimal point go? (a) 0.051 (b) 0.00051 (c) 0.51 (d) 0.0051
15. 15.2.1 × 4.7 — where does the decimal point go? (a) 0.987 (b) 0.0987 (c) 9.87 (d) 98.7
16. 16.5.1 × 3 — where does the decimal point go? (a) 1.53 (b) 15.3 (c) 153 (d) 0.153
17. 17.3.9 × 0.5 — where does the decimal point go? (a) 0.195 (b) 19.5 (c) 1.95 (d) 0.0195
18. 18.0.64 × 4 — where does the decimal point go? (a) 0.0256 (b) 25.6 (c) 2.56 (d) 0.256
19. 19.4.3 × 0.4 — where does the decimal point go? (a) 0.172 (b) 17.2 (c) 0.0172 (d) 1.72
20. 20.9.1 × 3.2 — where does the decimal point go? (a) 291.2 (b) 0.2912 (c) 29.12 (d) 2.912
21. 21.2.9 × 38 — where does the decimal point go? (a) 11.02 (b) 1.102 (c) 1102 (d) 110.2
22. 22.5.7 × 2.5 — where does the decimal point go? (a) 142.5 (b) 14.25 (c) 1.425 (d) 0.1425
23. 23.0.56 × 31 — where does the decimal point go? (a) 173.6 (b) 1.736 (c) 0.1736 (d) 17.36
24. 24.0.38 × 8 — where does the decimal point go? (a) 0.0304 (b) 30.4 (c) 3.04 (d) 0.304
25. 25.0.78 × 3.7 — where does the decimal point go? (a) 0.2886 (b) 0.02886 (c) 28.86 (d) 2.886
26. 26.5.9 × 0.5 — where does the decimal point go? (a) 0.295 (b) 29.5 (c) 0.0295 (d) 2.95
27. 27.9.8 × 2 — where does the decimal point go? (a) 1.96 (b) 196 (c) 19.6 (d) 0.196
28. 28.9.6 × 4.9 — where does the decimal point go? (a) 47.04 (b) 470.4 (c) 4.704 (d) 0.4704
29. 29.0.67 × 7 — where does the decimal point go? (a) 4.69 (b) 0.0469 (c) 46.9 (d) 0.469
30. 30.6.4 × 6 — where does the decimal point go? (a) 0.384 (b) 3.84 (c) 384 (d) 38.4
31. 31.6.4 × 0.9 — where does the decimal point go? (a) 0.576 (b) 0.0576 (c) 5.76 (d) 57.6
32. 32.0.75 × 9 — where does the decimal point go? (a) 67.5 (b) 0.0675 (c) 0.675 (d) 6.75
33. 33.0.44 × 4.7 — where does the decimal point go? (a) 0.02068 (b) 2.068 (c) 20.68 (d) 0.2068
34. 34.5.2 × 0.8 — where does the decimal point go? (a) 4.16 (b) 0.0416 (c) 41.6 (d) 0.416
35. 35.0.81 × 1.3 — where does the decimal point go? (a) 0.1053 (b) 10.53 (c) 0.01053 (d) 1.053
36. 36.0.42 × 0.2 — where does the decimal point go? (a) 0.00084 (b) 0.084 (c) 0.84 (d) 0.0084
37. 37.5.6 × 2.1 — where does the decimal point go? (a) 1.176 (b) 11.76 (c) 117.6 (d) 0.1176
38. 38.5.4 × 7 — where does the decimal point go? (a) 0.378 (b) 3.78 (c) 378 (d) 37.8
39. 39.5.1 × 5 — where does the decimal point go? (a) 0.255 (b) 25.5 (c) 255 (d) 2.55
40. 40.0.96 × 11 — where does the decimal point go? (a) 0.1056 (b) 105.6 (c) 10.56 (d) 1.056

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