Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 720 · 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. 1.0.81 × 0.4 — where does the decimal point go? (a) 0.0324 (b) 3.24 (c) 0.00324 (d) 0.324
2. 2.5.2 × 4 — where does the decimal point go? (a) 0.208 (b) 208 (c) 2.08 (d) 20.8
3. 3.0.28 × 6 — where does the decimal point go? (a) 16.8 (b) 0.168 (c) 1.68 (d) 0.0168
4. 4.5.4 × 6 — where does the decimal point go? (a) 32.4 (b) 0.324 (c) 324 (d) 3.24
5. 5.0.87 × 9 — where does the decimal point go? (a) 0.783 (b) 7.83 (c) 0.0783 (d) 78.3
6. 6.0.71 × 0.8 — where does the decimal point go? (a) 0.568 (b) 0.0568 (c) 5.68 (d) 0.00568
7. 7.7.8 × 4.9 — where does the decimal point go? (a) 38.22 (b) 3.822 (c) 0.3822 (d) 382.2
8. 8.0.21 × 22 — where does the decimal point go? (a) 0.462 (b) 46.2 (c) 0.0462 (d) 4.62
9. 9.0.31 × 0.5 — where does the decimal point go? (a) 0.0155 (b) 0.155 (c) 1.55 (d) 0.00155
10. 10.0.46 × 49 — where does the decimal point go? (a) 0.2254 (b) 22.54 (c) 225.4 (d) 2.254
11. 11.4.6 × 0.6 — where does the decimal point go? (a) 0.276 (b) 0.0276 (c) 2.76 (d) 27.6
12. 12.0.59 × 0.4 — where does the decimal point go? (a) 0.0236 (b) 0.236 (c) 2.36 (d) 0.00236
13. 13.0.14 × 8 — where does the decimal point go? (a) 0.112 (b) 1.12 (c) 11.2 (d) 0.0112
14. 14.0.26 × 0.3 — where does the decimal point go? (a) 0.78 (b) 0.0078 (c) 0.078 (d) 0.00078
15. 15.2.3 × 0.8 — where does the decimal point go? (a) 18.4 (b) 0.0184 (c) 1.84 (d) 0.184
16. 16.9.8 × 19 — where does the decimal point go? (a) 1862 (b) 1.862 (c) 186.2 (d) 18.62
17. 17.8.9 × 8 — where does the decimal point go? (a) 71.2 (b) 0.712 (c) 712 (d) 7.12
18. 18.2.2 × 3.8 — where does the decimal point go? (a) 0.0836 (b) 8.36 (c) 0.836 (d) 83.6
19. 19.0.74 × 0.4 — where does the decimal point go? (a) 0.296 (b) 2.96 (c) 0.0296 (d) 0.00296
20. 20.5.5 × 5 — where does the decimal point go? (a) 275 (b) 2.75 (c) 0.275 (d) 27.5
21. 21.0.22 × 3 — where does the decimal point go? (a) 0.066 (b) 0.66 (c) 6.6 (d) 0.0066
22. 22.5.3 × 0.3 — where does the decimal point go? (a) 15.9 (b) 0.159 (c) 0.0159 (d) 1.59
23. 23.0.81 × 1.7 — where does the decimal point go? (a) 0.01377 (b) 13.77 (c) 0.1377 (d) 1.377
24. 24.8.8 × 0.9 — where does the decimal point go? (a) 0.792 (b) 0.0792 (c) 7.92 (d) 79.2
25. 25.0.37 × 0.8 — where does the decimal point go? (a) 0.00296 (b) 0.296 (c) 0.0296 (d) 2.96
26. 26.0.88 × 44 — where does the decimal point go? (a) 3.872 (b) 38.72 (c) 0.3872 (d) 387.2
27. 27.5.6 × 0.3 — where does the decimal point go? (a) 0.0168 (b) 1.68 (c) 16.8 (d) 0.168
28. 28.0.25 × 23 — where does the decimal point go? (a) 57.5 (b) 5.75 (c) 0.0575 (d) 0.575
29. 29.8.8 × 0.3 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 0.0264 (d) 2.64
30. 30.6.1 × 0.6 — where does the decimal point go? (a) 0.366 (b) 36.6 (c) 0.0366 (d) 3.66
31. 31.5.8 × 0.4 — where does the decimal point go? (a) 23.2 (b) 2.32 (c) 0.0232 (d) 0.232
32. 32.5.7 × 0.2 — where does the decimal point go? (a) 1.14 (b) 0.114 (c) 11.4 (d) 0.0114
33. 33.7.9 × 41 — where does the decimal point go? (a) 32.39 (b) 323.9 (c) 3239 (d) 3.239
34. 34.0.58 × 0.7 — where does the decimal point go? (a) 4.06 (b) 0.00406 (c) 0.406 (d) 0.0406
35. 35.0.31 × 36 — where does the decimal point go? (a) 111.6 (b) 11.16 (c) 1.116 (d) 0.1116
36. 36.1.2 × 9 — where does the decimal point go? (a) 10.8 (b) 108 (c) 0.108 (d) 1.08
37. 37.0.95 × 4.5 — where does the decimal point go? (a) 0.4275 (b) 42.75 (c) 0.04275 (d) 4.275
38. 38.3.9 × 0.5 — where does the decimal point go? (a) 0.195 (b) 1.95 (c) 0.0195 (d) 19.5
39. 39.0.57 × 15 — where does the decimal point go? (a) 8.55 (b) 0.0855 (c) 85.5 (d) 0.855
40. 40.0.97 × 2.3 — where does the decimal point go? (a) 0.2231 (b) 0.02231 (c) 2.231 (d) 22.31

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