Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 231 · 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. 1.0.64 × 3.6 — where does the decimal point go? (a) 0.2304 (b) 23.04 (c) 2.304 (d) 0.02304
2. 2.9.1 × 1.7 — where does the decimal point go? (a) 0.1547 (b) 15.47 (c) 154.7 (d) 1.547
3. 3.0.42 × 2.9 — where does the decimal point go? (a) 0.1218 (b) 12.18 (c) 0.01218 (d) 1.218
4. 4.0.68 × 9 — where does the decimal point go? (a) 0.612 (b) 6.12 (c) 0.0612 (d) 61.2
5. 5.5.7 × 3.3 — where does the decimal point go? (a) 18.81 (b) 188.1 (c) 1.881 (d) 0.1881
6. 6.5.4 × 0.6 — where does the decimal point go? (a) 0.0324 (b) 3.24 (c) 32.4 (d) 0.324
7. 7.0.75 × 1.7 — where does the decimal point go? (a) 12.75 (b) 0.1275 (c) 0.01275 (d) 1.275
8. 8.2.3 × 6 — where does the decimal point go? (a) 0.138 (b) 13.8 (c) 1.38 (d) 138
9. 9.3.6 × 0.4 — where does the decimal point go? (a) 1.44 (b) 0.0144 (c) 14.4 (d) 0.144
10. 10.4.9 × 0.4 — where does the decimal point go? (a) 1.96 (b) 0.196 (c) 19.6 (d) 0.0196
11. 11.5.3 × 7 — where does the decimal point go? (a) 3.71 (b) 0.371 (c) 37.1 (d) 371
12. 12.1.2 × 47 — where does the decimal point go? (a) 564 (b) 5.64 (c) 0.564 (d) 56.4
13. 13.0.24 × 8 — where does the decimal point go? (a) 0.0192 (b) 1.92 (c) 0.192 (d) 19.2
14. 14.0.97 × 8 — where does the decimal point go? (a) 0.0776 (b) 0.776 (c) 7.76 (d) 77.6
15. 15.7.4 × 28 — where does the decimal point go? (a) 207.2 (b) 20.72 (c) 2.072 (d) 2072
16. 16.3.4 × 2 — where does the decimal point go? (a) 0.68 (b) 0.068 (c) 6.8 (d) 68
17. 17.4.1 × 7 — where does the decimal point go? (a) 28.7 (b) 287 (c) 2.87 (d) 0.287
18. 18.5.5 × 0.5 — where does the decimal point go? (a) 0.0275 (b) 27.5 (c) 2.75 (d) 0.275
19. 19.0.16 × 1.8 — where does the decimal point go? (a) 0.288 (b) 0.0288 (c) 2.88 (d) 0.00288
20. 20.0.52 × 0.2 — where does the decimal point go? (a) 0.104 (b) 1.04 (c) 0.00104 (d) 0.0104
21. 21.0.94 × 27 — where does the decimal point go? (a) 2.538 (b) 25.38 (c) 253.8 (d) 0.2538
22. 22.0.34 × 0.3 — where does the decimal point go? (a) 0.00102 (b) 0.0102 (c) 1.02 (d) 0.102
23. 23.3.4 × 0.7 — where does the decimal point go? (a) 2.38 (b) 0.0238 (c) 0.238 (d) 23.8
24. 24.0.18 × 2.7 — where does the decimal point go? (a) 0.0486 (b) 0.486 (c) 4.86 (d) 0.00486
25. 25.0.24 × 26 — where does the decimal point go? (a) 6.24 (b) 0.0624 (c) 62.4 (d) 0.624
26. 26.4.7 × 0.9 — where does the decimal point go? (a) 42.3 (b) 0.0423 (c) 0.423 (d) 4.23
27. 27.0.14 × 6 — where does the decimal point go? (a) 0.84 (b) 8.4 (c) 0.084 (d) 0.0084
28. 28.3.3 × 2.6 — where does the decimal point go? (a) 0.858 (b) 85.8 (c) 0.0858 (d) 8.58
29. 29.7.4 × 2 — where does the decimal point go? (a) 1.48 (b) 0.148 (c) 148 (d) 14.8
30. 30.0.76 × 0.2 — where does the decimal point go? (a) 0.0152 (b) 0.00152 (c) 0.152 (d) 1.52
31. 31.0.73 × 0.5 — where does the decimal point go? (a) 0.00365 (b) 0.0365 (c) 3.65 (d) 0.365
32. 32.7.4 × 3.1 — where does the decimal point go? (a) 0.2294 (b) 229.4 (c) 2.294 (d) 22.94
33. 33.0.24 × 0.3 — where does the decimal point go? (a) 0.72 (b) 0.072 (c) 0.00072 (d) 0.0072
34. 34.2.7 × 0.9 — where does the decimal point go? (a) 2.43 (b) 0.0243 (c) 0.243 (d) 24.3
35. 35.5.5 × 1.1 — where does the decimal point go? (a) 0.605 (b) 0.0605 (c) 60.5 (d) 6.05
36. 36.8.6 × 0.6 — where does the decimal point go? (a) 0.0516 (b) 51.6 (c) 0.516 (d) 5.16
37. 37.0.96 × 42 — where does the decimal point go? (a) 403.2 (b) 0.4032 (c) 4.032 (d) 40.32
38. 38.0.84 × 0.7 — where does the decimal point go? (a) 5.88 (b) 0.588 (c) 0.0588 (d) 0.00588
39. 39.6.8 × 12 — where does the decimal point go? (a) 8.16 (b) 816 (c) 0.816 (d) 81.6
40. 40.0.78 × 0.4 — where does the decimal point go? (a) 0.312 (b) 3.12 (c) 0.00312 (d) 0.0312

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