Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 305 · 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. 1.3.9 × 1.3 — where does the decimal point go? (a) 5.07 (b) 0.0507 (c) 50.7 (d) 0.507
2. 2.3.7 × 48 — where does the decimal point go? (a) 1.776 (b) 17.76 (c) 177.6 (d) 1776
3. 3.0.94 × 2 — where does the decimal point go? (a) 0.0188 (b) 0.188 (c) 1.88 (d) 18.8
4. 4.9.6 × 0.4 — where does the decimal point go? (a) 3.84 (b) 38.4 (c) 0.384 (d) 0.0384
5. 5.9.6 × 2 — where does the decimal point go? (a) 19.2 (b) 1.92 (c) 192 (d) 0.192
6. 6.5.9 × 1.9 — where does the decimal point go? (a) 1.121 (b) 0.1121 (c) 112.1 (d) 11.21
7. 7.0.93 × 0.4 — where does the decimal point go? (a) 0.372 (b) 0.00372 (c) 3.72 (d) 0.0372
8. 8.0.93 × 2 — where does the decimal point go? (a) 1.86 (b) 0.186 (c) 0.0186 (d) 18.6
9. 9.0.28 × 47 — where does the decimal point go? (a) 0.1316 (b) 1.316 (c) 13.16 (d) 131.6
10. 10.3.4 × 0.6 — where does the decimal point go? (a) 20.4 (b) 0.0204 (c) 0.204 (d) 2.04
11. 11.1.8 × 3.4 — where does the decimal point go? (a) 6.12 (b) 0.612 (c) 0.0612 (d) 61.2
12. 12.0.72 × 0.6 — where does the decimal point go? (a) 0.00432 (b) 0.0432 (c) 0.432 (d) 4.32
13. 13.8.3 × 41 — where does the decimal point go? (a) 3.403 (b) 3403 (c) 340.3 (d) 34.03
14. 14.9.6 × 48 — where does the decimal point go? (a) 4.608 (b) 4608 (c) 460.8 (d) 46.08
15. 15.0.94 × 0.3 — where does the decimal point go? (a) 0.0282 (b) 0.00282 (c) 0.282 (d) 2.82
16. 16.0.19 × 8 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 0.0152 (d) 15.2
17. 17.0.98 × 2 — where does the decimal point go? (a) 0.0196 (b) 0.196 (c) 19.6 (d) 1.96
18. 18.8.4 × 8 — where does the decimal point go? (a) 0.672 (b) 6.72 (c) 672 (d) 67.2
19. 19.0.29 × 11 — where does the decimal point go? (a) 0.319 (b) 3.19 (c) 31.9 (d) 0.0319
20. 20.0.68 × 17 — where does the decimal point go? (a) 0.1156 (b) 115.6 (c) 11.56 (d) 1.156
21. 21.0.52 × 0.8 — where does the decimal point go? (a) 4.16 (b) 0.416 (c) 0.00416 (d) 0.0416
22. 22.0.27 × 4 — where does the decimal point go? (a) 1.08 (b) 0.108 (c) 0.0108 (d) 10.8
23. 23.5.9 × 23 — where does the decimal point go? (a) 135.7 (b) 1.357 (c) 1357 (d) 13.57
24. 24.4.5 × 0.7 — where does the decimal point go? (a) 3.15 (b) 0.315 (c) 0.0315 (d) 31.5
25. 25.1.4 × 2.4 — where does the decimal point go? (a) 0.336 (b) 0.0336 (c) 3.36 (d) 33.6
26. 26.0.18 × 0.3 — where does the decimal point go? (a) 0.54 (b) 0.0054 (c) 0.00054 (d) 0.054
27. 27.2.6 × 0.2 — where does the decimal point go? (a) 0.052 (b) 5.2 (c) 0.0052 (d) 0.52
28. 28.3.1 × 5 — where does the decimal point go? (a) 0.155 (b) 1.55 (c) 155 (d) 15.5
29. 29.8.9 × 1.1 — where does the decimal point go? (a) 0.979 (b) 0.0979 (c) 9.79 (d) 97.9
30. 30.7.4 × 36 — where does the decimal point go? (a) 266.4 (b) 2664 (c) 26.64 (d) 2.664
31. 31.0.53 × 1.7 — where does the decimal point go? (a) 9.01 (b) 0.901 (c) 0.0901 (d) 0.00901
32. 32.2.8 × 33 — where does the decimal point go? (a) 924 (b) 0.924 (c) 92.4 (d) 9.24
33. 33.0.88 × 0.4 — where does the decimal point go? (a) 0.00352 (b) 0.0352 (c) 0.352 (d) 3.52
34. 34.0.18 × 4 — where does the decimal point go? (a) 0.72 (b) 0.072 (c) 0.0072 (d) 7.2
35. 35.0.15 × 15 — where does the decimal point go? (a) 22.5 (b) 0.0225 (c) 0.225 (d) 2.25
36. 36.0.64 × 4 — where does the decimal point go? (a) 2.56 (b) 0.256 (c) 25.6 (d) 0.0256
37. 37.7.9 × 4 — where does the decimal point go? (a) 316 (b) 0.316 (c) 3.16 (d) 31.6
38. 38.6.7 × 4.3 — where does the decimal point go? (a) 2.881 (b) 0.2881 (c) 288.1 (d) 28.81
39. 39.0.86 × 4.7 — where does the decimal point go? (a) 0.4042 (b) 0.04042 (c) 4.042 (d) 40.42
40. 40.4.5 × 29 — where does the decimal point go? (a) 130.5 (b) 13.05 (c) 1305 (d) 1.305

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