Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 331 · 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. 1.0.48 × 17 — where does the decimal point go? (a) 8.16 (b) 81.6 (c) 0.0816 (d) 0.816
2. 2.8.9 × 0.8 — where does the decimal point go? (a) 7.12 (b) 71.2 (c) 0.0712 (d) 0.712
3. 3.7.7 × 3 — where does the decimal point go? (a) 0.231 (b) 23.1 (c) 2.31 (d) 231
4. 4.6.4 × 8 — where does the decimal point go? (a) 51.2 (b) 0.512 (c) 512 (d) 5.12
5. 5.0.82 × 33 — where does the decimal point go? (a) 2.706 (b) 0.2706 (c) 27.06 (d) 270.6
6. 6.4.1 × 41 — where does the decimal point go? (a) 1.681 (b) 16.81 (c) 168.1 (d) 1681
7. 7.6.1 × 28 — where does the decimal point go? (a) 170.8 (b) 1708 (c) 1.708 (d) 17.08
8. 8.3.8 × 0.8 — where does the decimal point go? (a) 3.04 (b) 30.4 (c) 0.0304 (d) 0.304
9. 9.0.68 × 3 — where does the decimal point go? (a) 2.04 (b) 0.0204 (c) 0.204 (d) 20.4
10. 10.8.1 × 0.6 — where does the decimal point go? (a) 4.86 (b) 0.486 (c) 48.6 (d) 0.0486
11. 11.4.3 × 2 — where does the decimal point go? (a) 8.6 (b) 0.086 (c) 86 (d) 0.86
12. 12.0.38 × 0.3 — where does the decimal point go? (a) 1.14 (b) 0.00114 (c) 0.0114 (d) 0.114
13. 13.0.92 × 36 — where does the decimal point go? (a) 331.2 (b) 3.312 (c) 33.12 (d) 0.3312
14. 14.9.6 × 0.3 — where does the decimal point go? (a) 0.0288 (b) 2.88 (c) 0.288 (d) 28.8
15. 15.0.49 × 37 — where does the decimal point go? (a) 18.13 (b) 181.3 (c) 1.813 (d) 0.1813
16. 16.1.8 × 0.3 — where does the decimal point go? (a) 0.054 (b) 0.54 (c) 0.0054 (d) 5.4
17. 17.1.4 × 0.7 — where does the decimal point go? (a) 0.98 (b) 0.0098 (c) 9.8 (d) 0.098
18. 18.7.3 × 0.3 — where does the decimal point go? (a) 21.9 (b) 2.19 (c) 0.219 (d) 0.0219
19. 19.1.4 × 0.3 — where does the decimal point go? (a) 0.42 (b) 4.2 (c) 0.042 (d) 0.0042
20. 20.0.61 × 0.2 — where does the decimal point go? (a) 0.122 (b) 1.22 (c) 0.0122 (d) 0.00122
21. 21.7.7 × 45 — where does the decimal point go? (a) 34.65 (b) 346.5 (c) 3.465 (d) 3465
22. 22.0.33 × 22 — where does the decimal point go? (a) 0.726 (b) 72.6 (c) 7.26 (d) 0.0726
23. 23.0.71 × 4.1 — where does the decimal point go? (a) 2.911 (b) 0.02911 (c) 0.2911 (d) 29.11
24. 24.0.63 × 1.7 — where does the decimal point go? (a) 10.71 (b) 0.01071 (c) 0.1071 (d) 1.071
25. 25.0.97 × 8 — where does the decimal point go? (a) 7.76 (b) 0.0776 (c) 77.6 (d) 0.776
26. 26.4.1 × 3.6 — where does the decimal point go? (a) 147.6 (b) 14.76 (c) 1.476 (d) 0.1476
27. 27.0.62 × 3 — where does the decimal point go? (a) 0.186 (b) 1.86 (c) 18.6 (d) 0.0186
28. 28.0.18 × 1.8 — where does the decimal point go? (a) 0.00324 (b) 0.0324 (c) 3.24 (d) 0.324
29. 29.0.29 × 1.9 — where does the decimal point go? (a) 0.00551 (b) 0.0551 (c) 5.51 (d) 0.551
30. 30.1.7 × 0.8 — where does the decimal point go? (a) 1.36 (b) 13.6 (c) 0.136 (d) 0.0136
31. 31.0.29 × 1.7 — where does the decimal point go? (a) 4.93 (b) 0.493 (c) 0.0493 (d) 0.00493
32. 32.0.37 × 1.6 — where does the decimal point go? (a) 0.0592 (b) 0.00592 (c) 0.592 (d) 5.92
33. 33.0.71 × 1.5 — where does the decimal point go? (a) 0.01065 (b) 0.1065 (c) 1.065 (d) 10.65
34. 34.0.28 × 1.7 — where does the decimal point go? (a) 0.0476 (b) 0.00476 (c) 0.476 (d) 4.76
35. 35.0.73 × 4 — where does the decimal point go? (a) 0.0292 (b) 29.2 (c) 2.92 (d) 0.292
36. 36.2.3 × 2.5 — where does the decimal point go? (a) 0.0575 (b) 0.575 (c) 57.5 (d) 5.75
37. 37.3.1 × 0.4 — where does the decimal point go? (a) 1.24 (b) 0.0124 (c) 0.124 (d) 12.4
38. 38.5.4 × 3 — where does the decimal point go? (a) 1.62 (b) 0.162 (c) 16.2 (d) 162
39. 39.0.22 × 1.2 — where does the decimal point go? (a) 0.264 (b) 0.00264 (c) 0.0264 (d) 2.64
40. 40.0.42 × 4 — where does the decimal point go? (a) 16.8 (b) 0.168 (c) 1.68 (d) 0.0168

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