Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 17 · 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. 1.8.6 × 0.3 — where does the decimal point go? (a) 2.58 (b) 25.8 (c) 0.0258 (d) 0.258
2. 2.0.36 × 3.6 — where does the decimal point go? (a) 12.96 (b) 1.296 (c) 0.01296 (d) 0.1296
3. 3.1.2 × 7 — where does the decimal point go? (a) 84 (b) 8.4 (c) 0.084 (d) 0.84
4. 4.1.4 × 2.1 — where does the decimal point go? (a) 2.94 (b) 29.4 (c) 0.294 (d) 0.0294
5. 5.6.8 × 43 — where does the decimal point go? (a) 2924 (b) 2.924 (c) 29.24 (d) 292.4
6. 6.0.32 × 3 — where does the decimal point go? (a) 0.096 (b) 9.6 (c) 0.0096 (d) 0.96
7. 7.2.3 × 0.6 — where does the decimal point go? (a) 0.138 (b) 13.8 (c) 0.0138 (d) 1.38
8. 8.5.7 × 0.5 — where does the decimal point go? (a) 2.85 (b) 28.5 (c) 0.0285 (d) 0.285
9. 9.8.3 × 2.8 — where does the decimal point go? (a) 23.24 (b) 2.324 (c) 0.2324 (d) 232.4
10. 10.0.17 × 2.1 — where does the decimal point go? (a) 0.357 (b) 0.0357 (c) 0.00357 (d) 3.57
11. 11.0.52 × 18 — where does the decimal point go? (a) 0.936 (b) 0.0936 (c) 9.36 (d) 93.6
12. 12.8.4 × 0.4 — where does the decimal point go? (a) 0.0336 (b) 0.336 (c) 3.36 (d) 33.6
13. 13.0.49 × 7 — where does the decimal point go? (a) 0.0343 (b) 34.3 (c) 3.43 (d) 0.343
14. 14.8.3 × 1.7 — where does the decimal point go? (a) 0.1411 (b) 141.1 (c) 14.11 (d) 1.411
15. 15.0.64 × 3.9 — where does the decimal point go? (a) 2.496 (b) 0.02496 (c) 0.2496 (d) 24.96
16. 16.0.78 × 0.3 — where does the decimal point go? (a) 0.00234 (b) 0.234 (c) 2.34 (d) 0.0234
17. 17.8.2 × 0.2 — where does the decimal point go? (a) 16.4 (b) 0.164 (c) 0.0164 (d) 1.64
18. 18.0.17 × 17 — where does the decimal point go? (a) 0.0289 (b) 2.89 (c) 28.9 (d) 0.289
19. 19.0.98 × 8 — where does the decimal point go? (a) 0.0784 (b) 7.84 (c) 78.4 (d) 0.784
20. 20.0.45 × 29 — where does the decimal point go? (a) 1.305 (b) 0.1305 (c) 13.05 (d) 130.5
21. 21.5.1 × 1.7 — where does the decimal point go? (a) 86.7 (b) 8.67 (c) 0.0867 (d) 0.867
22. 22.6.1 × 18 — where does the decimal point go? (a) 10.98 (b) 109.8 (c) 1.098 (d) 1098
23. 23.9.8 × 7 — where does the decimal point go? (a) 0.686 (b) 6.86 (c) 686 (d) 68.6
24. 24.0.87 × 0.5 — where does the decimal point go? (a) 0.00435 (b) 0.435 (c) 0.0435 (d) 4.35
25. 25.0.16 × 0.7 — where does the decimal point go? (a) 1.12 (b) 0.112 (c) 0.0112 (d) 0.00112
26. 26.0.55 × 0.3 — where does the decimal point go? (a) 0.165 (b) 0.0165 (c) 0.00165 (d) 1.65
27. 27.1.9 × 0.4 — where does the decimal point go? (a) 0.0076 (b) 7.6 (c) 0.76 (d) 0.076
28. 28.0.38 × 4 — where does the decimal point go? (a) 0.0152 (b) 15.2 (c) 0.152 (d) 1.52
29. 29.0.12 × 13 — where does the decimal point go? (a) 1.56 (b) 0.156 (c) 0.0156 (d) 15.6
30. 30.6.7 × 0.3 — where does the decimal point go? (a) 0.0201 (b) 2.01 (c) 20.1 (d) 0.201
31. 31.6.8 × 4 — where does the decimal point go? (a) 27.2 (b) 2.72 (c) 0.272 (d) 272
32. 32.0.63 × 0.2 — where does the decimal point go? (a) 0.00126 (b) 0.0126 (c) 1.26 (d) 0.126
33. 33.0.42 × 0.3 — where does the decimal point go? (a) 0.126 (b) 0.0126 (c) 1.26 (d) 0.00126
34. 34.0.77 × 0.9 — where does the decimal point go? (a) 6.93 (b) 0.00693 (c) 0.0693 (d) 0.693
35. 35.4.9 × 3.7 — where does the decimal point go? (a) 18.13 (b) 0.1813 (c) 181.3 (d) 1.813
36. 36.9.7 × 25 — where does the decimal point go? (a) 242.5 (b) 24.25 (c) 2425 (d) 2.425
37. 37.0.58 × 46 — where does the decimal point go? (a) 26.68 (b) 2.668 (c) 0.2668 (d) 266.8
38. 38.0.89 × 2 — where does the decimal point go? (a) 17.8 (b) 1.78 (c) 0.0178 (d) 0.178
39. 39.1.8 × 16 — where does the decimal point go? (a) 288 (b) 28.8 (c) 2.88 (d) 0.288
40. 40.0.12 × 4 — where does the decimal point go? (a) 0.48 (b) 0.0048 (c) 0.048 (d) 4.8

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