Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 712 · 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. 1.1.7 × 4.8 — where does the decimal point go? (a) 81.6 (b) 8.16 (c) 0.0816 (d) 0.816
2. 2.0.21 × 2.8 — where does the decimal point go? (a) 0.0588 (b) 0.00588 (c) 0.588 (d) 5.88
3. 3.0.43 × 33 — where does the decimal point go? (a) 0.1419 (b) 1.419 (c) 14.19 (d) 141.9
4. 4.0.17 × 39 — where does the decimal point go? (a) 6.63 (b) 0.0663 (c) 66.3 (d) 0.663
5. 5.9.1 × 18 — where does the decimal point go? (a) 163.8 (b) 1.638 (c) 1638 (d) 16.38
6. 6.0.12 × 4.9 — where does the decimal point go? (a) 0.0588 (b) 0.588 (c) 5.88 (d) 0.00588
7. 7.0.32 × 0.7 — where does the decimal point go? (a) 0.0224 (b) 0.00224 (c) 0.224 (d) 2.24
8. 8.0.51 × 0.7 — where does the decimal point go? (a) 0.00357 (b) 0.357 (c) 0.0357 (d) 3.57
9. 9.1.8 × 0.2 — where does the decimal point go? (a) 0.0036 (b) 0.36 (c) 0.036 (d) 3.6
10. 10.0.27 × 11 — where does the decimal point go? (a) 2.97 (b) 0.297 (c) 29.7 (d) 0.0297
11. 11.7.7 × 6 — where does the decimal point go? (a) 46.2 (b) 0.462 (c) 4.62 (d) 462
12. 12.0.99 × 3.5 — where does the decimal point go? (a) 0.03465 (b) 3.465 (c) 0.3465 (d) 34.65
13. 13.2.1 × 5 — where does the decimal point go? (a) 105 (b) 0.105 (c) 10.5 (d) 1.05
14. 14.8.2 × 48 — where does the decimal point go? (a) 3936 (b) 39.36 (c) 393.6 (d) 3.936
15. 15.0.37 × 4.5 — where does the decimal point go? (a) 16.65 (b) 0.01665 (c) 0.1665 (d) 1.665
16. 16.0.92 × 3.2 — where does the decimal point go? (a) 0.2944 (b) 2.944 (c) 0.02944 (d) 29.44
17. 17.1.2 × 2.9 — where does the decimal point go? (a) 0.0348 (b) 0.348 (c) 34.8 (d) 3.48
18. 18.4.1 × 11 — where does the decimal point go? (a) 451 (b) 4.51 (c) 45.1 (d) 0.451
19. 19.4.6 × 2.9 — where does the decimal point go? (a) 13.34 (b) 133.4 (c) 0.1334 (d) 1.334
20. 20.0.52 × 0.2 — where does the decimal point go? (a) 1.04 (b) 0.00104 (c) 0.104 (d) 0.0104
21. 21.4.5 × 0.7 — where does the decimal point go? (a) 0.0315 (b) 3.15 (c) 0.315 (d) 31.5
22. 22.0.52 × 2.7 — where does the decimal point go? (a) 1.404 (b) 0.01404 (c) 14.04 (d) 0.1404
23. 23.6.7 × 0.4 — where does the decimal point go? (a) 2.68 (b) 0.0268 (c) 26.8 (d) 0.268
24. 24.0.23 × 3 — where does the decimal point go? (a) 0.069 (b) 0.0069 (c) 0.69 (d) 6.9
25. 25.0.54 × 16 — where does the decimal point go? (a) 86.4 (b) 0.864 (c) 8.64 (d) 0.0864
26. 26.1.9 × 2.9 — where does the decimal point go? (a) 55.1 (b) 5.51 (c) 0.0551 (d) 0.551
27. 27.0.93 × 7 — where does the decimal point go? (a) 0.0651 (b) 6.51 (c) 65.1 (d) 0.651
28. 28.0.44 × 22 — where does the decimal point go? (a) 9.68 (b) 0.0968 (c) 0.968 (d) 96.8
29. 29.0.27 × 12 — where does the decimal point go? (a) 0.0324 (b) 3.24 (c) 32.4 (d) 0.324
30. 30.0.51 × 9 — where does the decimal point go? (a) 0.459 (b) 4.59 (c) 0.0459 (d) 45.9
31. 31.0.99 × 4 — where does the decimal point go? (a) 0.396 (b) 39.6 (c) 0.0396 (d) 3.96
32. 32.8.5 × 0.9 — where does the decimal point go? (a) 0.0765 (b) 0.765 (c) 7.65 (d) 76.5
33. 33.2.9 × 43 — where does the decimal point go? (a) 1.247 (b) 12.47 (c) 1247 (d) 124.7
34. 34.6.4 × 4.7 — where does the decimal point go? (a) 30.08 (b) 0.3008 (c) 3.008 (d) 300.8
35. 35.0.53 × 0.5 — where does the decimal point go? (a) 0.265 (b) 2.65 (c) 0.0265 (d) 0.00265
36. 36.7.1 × 9 — where does the decimal point go? (a) 63.9 (b) 0.639 (c) 6.39 (d) 639
37. 37.0.74 × 0.9 — where does the decimal point go? (a) 0.666 (b) 0.00666 (c) 6.66 (d) 0.0666
38. 38.5.8 × 2 — where does the decimal point go? (a) 11.6 (b) 116 (c) 1.16 (d) 0.116
39. 39.0.65 × 2.5 — where does the decimal point go? (a) 1.625 (b) 16.25 (c) 0.1625 (d) 0.01625
40. 40.3.1 × 44 — where does the decimal point go? (a) 136.4 (b) 1364 (c) 1.364 (d) 13.64

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