Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 411 · 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. 1.0.99 × 42 — where does the decimal point go? (a) 4.158 (b) 41.58 (c) 415.8 (d) 0.4158
2. 2.0.21 × 34 — where does the decimal point go? (a) 71.4 (b) 7.14 (c) 0.0714 (d) 0.714
3. 3.8.7 × 19 — where does the decimal point go? (a) 1.653 (b) 16.53 (c) 1653 (d) 165.3
4. 4.0.96 × 6 — where does the decimal point go? (a) 5.76 (b) 0.576 (c) 0.0576 (d) 57.6
5. 5.0.71 × 9 — where does the decimal point go? (a) 0.0639 (b) 6.39 (c) 0.639 (d) 63.9
6. 6.8.1 × 0.9 — where does the decimal point go? (a) 0.0729 (b) 0.729 (c) 7.29 (d) 72.9
7. 7.4.9 × 33 — where does the decimal point go? (a) 161.7 (b) 16.17 (c) 1.617 (d) 1617
8. 8.7.8 × 9 — where does the decimal point go? (a) 0.702 (b) 70.2 (c) 702 (d) 7.02
9. 9.0.98 × 2 — where does the decimal point go? (a) 19.6 (b) 1.96 (c) 0.196 (d) 0.0196
10. 10.8.7 × 0.5 — where does the decimal point go? (a) 0.0435 (b) 4.35 (c) 43.5 (d) 0.435
11. 11.0.29 × 0.2 — where does the decimal point go? (a) 0.0058 (b) 0.058 (c) 0.58 (d) 0.00058
12. 12.0.13 × 2.2 — where does the decimal point go? (a) 0.286 (b) 2.86 (c) 0.00286 (d) 0.0286
13. 13.0.56 × 2.8 — where does the decimal point go? (a) 1.568 (b) 0.01568 (c) 15.68 (d) 0.1568
14. 14.8.4 × 2.7 — where does the decimal point go? (a) 226.8 (b) 0.2268 (c) 22.68 (d) 2.268
15. 15.0.88 × 1.6 — where does the decimal point go? (a) 14.08 (b) 0.01408 (c) 0.1408 (d) 1.408
16. 16.9.6 × 0.3 — where does the decimal point go? (a) 2.88 (b) 28.8 (c) 0.288 (d) 0.0288
17. 17.8.7 × 3.3 — where does the decimal point go? (a) 287.1 (b) 2.871 (c) 0.2871 (d) 28.71
18. 18.0.35 × 11 — where does the decimal point go? (a) 3.85 (b) 0.385 (c) 0.0385 (d) 38.5
19. 19.0.84 × 3 — where does the decimal point go? (a) 0.0252 (b) 25.2 (c) 0.252 (d) 2.52
20. 20.0.67 × 1.6 — where does the decimal point go? (a) 0.01072 (b) 0.1072 (c) 10.72 (d) 1.072
21. 21.4.4 × 2 — where does the decimal point go? (a) 0.88 (b) 88 (c) 0.088 (d) 8.8
22. 22.0.29 × 3.3 — where does the decimal point go? (a) 0.0957 (b) 0.00957 (c) 9.57 (d) 0.957
23. 23.0.93 × 23 — where does the decimal point go? (a) 0.2139 (b) 21.39 (c) 213.9 (d) 2.139
24. 24.2.7 × 5 — where does the decimal point go? (a) 135 (b) 1.35 (c) 13.5 (d) 0.135
25. 25.3.3 × 0.9 — where does the decimal point go? (a) 0.0297 (b) 2.97 (c) 29.7 (d) 0.297
26. 26.0.16 × 33 — where does the decimal point go? (a) 52.8 (b) 5.28 (c) 0.0528 (d) 0.528
27. 27.0.52 × 18 — where does the decimal point go? (a) 93.6 (b) 0.936 (c) 0.0936 (d) 9.36
28. 28.0.32 × 3.8 — where does the decimal point go? (a) 0.01216 (b) 1.216 (c) 12.16 (d) 0.1216
29. 29.0.24 × 0.3 — where does the decimal point go? (a) 0.072 (b) 0.00072 (c) 0.0072 (d) 0.72
30. 30.0.49 × 0.4 — where does the decimal point go? (a) 0.0196 (b) 1.96 (c) 0.00196 (d) 0.196
31. 31.6.8 × 3.6 — where does the decimal point go? (a) 0.2448 (b) 24.48 (c) 244.8 (d) 2.448
32. 32.6.6 × 1.4 — where does the decimal point go? (a) 0.924 (b) 0.0924 (c) 9.24 (d) 92.4
33. 33.5.7 × 4 — where does the decimal point go? (a) 2.28 (b) 22.8 (c) 0.228 (d) 228
34. 34.8.8 × 3.3 — where does the decimal point go? (a) 0.2904 (b) 2.904 (c) 290.4 (d) 29.04
35. 35.0.49 × 6 — where does the decimal point go? (a) 2.94 (b) 0.294 (c) 29.4 (d) 0.0294
36. 36.6.4 × 7 — where does the decimal point go? (a) 0.448 (b) 4.48 (c) 44.8 (d) 448
37. 37.1.5 × 0.5 — where does the decimal point go? (a) 0.75 (b) 0.0075 (c) 0.075 (d) 7.5
38. 38.0.16 × 8 — where does the decimal point go? (a) 12.8 (b) 0.128 (c) 0.0128 (d) 1.28
39. 39.0.17 × 0.4 — where does the decimal point go? (a) 0.68 (b) 0.068 (c) 0.0068 (d) 0.00068
40. 40.3.6 × 38 — where does the decimal point go? (a) 1.368 (b) 13.68 (c) 136.8 (d) 1368

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