Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 128 · 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. 1.0.78 × 4 — where does the decimal point go? (a) 3.12 (b) 0.0312 (c) 0.312 (d) 31.2
2. 2.9.4 × 39 — where does the decimal point go? (a) 3.666 (b) 36.66 (c) 3666 (d) 366.6
3. 3.0.46 × 28 — where does the decimal point go? (a) 12.88 (b) 0.1288 (c) 1.288 (d) 128.8
4. 4.5.1 × 4.8 — where does the decimal point go? (a) 24.48 (b) 0.2448 (c) 2.448 (d) 244.8
5. 5.0.32 × 3.9 — where does the decimal point go? (a) 12.48 (b) 1.248 (c) 0.01248 (d) 0.1248
6. 6.3.1 × 0.6 — where does the decimal point go? (a) 0.0186 (b) 1.86 (c) 18.6 (d) 0.186
7. 7.7.8 × 1.3 — where does the decimal point go? (a) 10.14 (b) 1.014 (c) 0.1014 (d) 101.4
8. 8.0.25 × 2.5 — where does the decimal point go? (a) 6.25 (b) 0.00625 (c) 0.625 (d) 0.0625
9. 9.0.67 × 3.1 — where does the decimal point go? (a) 0.02077 (b) 2.077 (c) 0.2077 (d) 20.77
10. 10.0.77 × 4.7 — where does the decimal point go? (a) 0.03619 (b) 36.19 (c) 3.619 (d) 0.3619
11. 11.1.9 × 0.4 — where does the decimal point go? (a) 0.0076 (b) 0.076 (c) 7.6 (d) 0.76
12. 12.0.29 × 3 — where does the decimal point go? (a) 0.087 (b) 0.0087 (c) 8.7 (d) 0.87
13. 13.0.18 × 7 — where does the decimal point go? (a) 0.126 (b) 12.6 (c) 0.0126 (d) 1.26
14. 14.6.3 × 0.6 — where does the decimal point go? (a) 37.8 (b) 3.78 (c) 0.378 (d) 0.0378
15. 15.0.36 × 1.7 — where does the decimal point go? (a) 0.612 (b) 0.00612 (c) 0.0612 (d) 6.12
16. 16.0.44 × 41 — where does the decimal point go? (a) 0.1804 (b) 18.04 (c) 1.804 (d) 180.4
17. 17.6.9 × 0.5 — where does the decimal point go? (a) 34.5 (b) 0.345 (c) 3.45 (d) 0.0345
18. 18.0.23 × 2.7 — where does the decimal point go? (a) 0.621 (b) 0.0621 (c) 0.00621 (d) 6.21
19. 19.4.1 × 0.2 — where does the decimal point go? (a) 0.0082 (b) 8.2 (c) 0.82 (d) 0.082
20. 20.6.3 × 0.3 — where does the decimal point go? (a) 1.89 (b) 0.189 (c) 18.9 (d) 0.0189
21. 21.1.6 × 3.7 — where does the decimal point go? (a) 0.0592 (b) 59.2 (c) 0.592 (d) 5.92
22. 22.0.54 × 0.8 — where does the decimal point go? (a) 0.0432 (b) 0.00432 (c) 0.432 (d) 4.32
23. 23.0.44 × 0.2 — where does the decimal point go? (a) 0.088 (b) 0.00088 (c) 0.88 (d) 0.0088
24. 24.0.69 × 1.7 — where does the decimal point go? (a) 1.173 (b) 0.1173 (c) 0.01173 (d) 11.73
25. 25.1.5 × 7 — where does the decimal point go? (a) 0.105 (b) 1.05 (c) 105 (d) 10.5
26. 26.0.63 × 0.9 — where does the decimal point go? (a) 0.567 (b) 0.0567 (c) 5.67 (d) 0.00567
27. 27.4.8 × 34 — where does the decimal point go? (a) 1.632 (b) 16.32 (c) 1632 (d) 163.2
28. 28.0.44 × 1.9 — where does the decimal point go? (a) 0.00836 (b) 0.836 (c) 0.0836 (d) 8.36
29. 29.1.8 × 6 — where does the decimal point go? (a) 1.08 (b) 0.108 (c) 108 (d) 10.8
30. 30.1.4 × 3.6 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 0.0504 (d) 5.04
31. 31.2.7 × 2 — where does the decimal point go? (a) 54 (b) 5.4 (c) 0.54 (d) 0.054
32. 32.0.83 × 2 — where does the decimal point go? (a) 0.166 (b) 0.0166 (c) 16.6 (d) 1.66
33. 33.2.4 × 9 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 21.6 (d) 216
34. 34.8.5 × 2.1 — where does the decimal point go? (a) 0.1785 (b) 17.85 (c) 1.785 (d) 178.5
35. 35.0.76 × 18 — where does the decimal point go? (a) 136.8 (b) 13.68 (c) 0.1368 (d) 1.368
36. 36.0.82 × 16 — where does the decimal point go? (a) 0.1312 (b) 131.2 (c) 1.312 (d) 13.12
37. 37.1.4 × 3 — where does the decimal point go? (a) 0.042 (b) 0.42 (c) 4.2 (d) 42
38. 38.3.1 × 3 — where does the decimal point go? (a) 9.3 (b) 0.93 (c) 0.093 (d) 93
39. 39.0.24 × 39 — where does the decimal point go? (a) 93.6 (b) 0.936 (c) 9.36 (d) 0.0936
40. 40.7.3 × 5 — where does the decimal point go? (a) 3.65 (b) 365 (c) 0.365 (d) 36.5

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