Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 386 · 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. 1.9.3 × 4.1 — where does the decimal point go? (a) 3.813 (b) 38.13 (c) 0.3813 (d) 381.3
2. 2.8.3 × 0.3 — where does the decimal point go? (a) 0.249 (b) 2.49 (c) 24.9 (d) 0.0249
3. 3.0.19 × 0.8 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 0.00152 (d) 0.0152
4. 4.5.4 × 9 — where does the decimal point go? (a) 48.6 (b) 4.86 (c) 486 (d) 0.486
5. 5.1.7 × 7 — where does the decimal point go? (a) 119 (b) 11.9 (c) 0.119 (d) 1.19
6. 6.8.9 × 39 — where does the decimal point go? (a) 34.71 (b) 3.471 (c) 3471 (d) 347.1
7. 7.2.7 × 0.6 — where does the decimal point go? (a) 0.162 (b) 16.2 (c) 0.0162 (d) 1.62
8. 8.1.6 × 2.7 — where does the decimal point go? (a) 0.432 (b) 0.0432 (c) 4.32 (d) 43.2
9. 9.5.8 × 3 — where does the decimal point go? (a) 0.174 (b) 17.4 (c) 1.74 (d) 174
10. 10.0.67 × 2 — where does the decimal point go? (a) 0.0134 (b) 13.4 (c) 1.34 (d) 0.134
11. 11.5.2 × 0.9 — where does the decimal point go? (a) 0.0468 (b) 4.68 (c) 46.8 (d) 0.468
12. 12.2.4 × 7 — where does the decimal point go? (a) 1.68 (b) 168 (c) 16.8 (d) 0.168
13. 13.0.18 × 8 — where does the decimal point go? (a) 0.144 (b) 14.4 (c) 0.0144 (d) 1.44
14. 14.0.18 × 2 — where does the decimal point go? (a) 0.036 (b) 3.6 (c) 0.0036 (d) 0.36
15. 15.0.33 × 42 — where does the decimal point go? (a) 138.6 (b) 1.386 (c) 13.86 (d) 0.1386
16. 16.2.2 × 3 — where does the decimal point go? (a) 66 (b) 6.6 (c) 0.066 (d) 0.66
17. 17.3.5 × 0.7 — where does the decimal point go? (a) 0.245 (b) 24.5 (c) 0.0245 (d) 2.45
18. 18.6.9 × 1.3 — where does the decimal point go? (a) 0.0897 (b) 89.7 (c) 0.897 (d) 8.97
19. 19.4.2 × 4 — where does the decimal point go? (a) 16.8 (b) 168 (c) 1.68 (d) 0.168
20. 20.9.6 × 44 — where does the decimal point go? (a) 422.4 (b) 4224 (c) 42.24 (d) 4.224
21. 21.1.3 × 2 — where does the decimal point go? (a) 26 (b) 0.26 (c) 0.026 (d) 2.6
22. 22.0.92 × 0.9 — where does the decimal point go? (a) 0.0828 (b) 8.28 (c) 0.00828 (d) 0.828
23. 23.7.8 × 0.2 — where does the decimal point go? (a) 0.0156 (b) 0.156 (c) 15.6 (d) 1.56
24. 24.7.1 × 28 — where does the decimal point go? (a) 1.988 (b) 1988 (c) 198.8 (d) 19.88
25. 25.0.14 × 0.8 — where does the decimal point go? (a) 0.0112 (b) 1.12 (c) 0.00112 (d) 0.112
26. 26.0.17 × 0.3 — where does the decimal point go? (a) 0.051 (b) 0.51 (c) 0.00051 (d) 0.0051
27. 27.0.47 × 0.8 — where does the decimal point go? (a) 0.00376 (b) 0.0376 (c) 3.76 (d) 0.376
28. 28.3.4 × 0.6 — where does the decimal point go? (a) 0.0204 (b) 0.204 (c) 2.04 (d) 20.4
29. 29.0.52 × 6 — where does the decimal point go? (a) 0.312 (b) 0.0312 (c) 31.2 (d) 3.12
30. 30.0.22 × 4.7 — where does the decimal point go? (a) 0.01034 (b) 10.34 (c) 1.034 (d) 0.1034
31. 31.2.9 × 5 — where does the decimal point go? (a) 145 (b) 0.145 (c) 1.45 (d) 14.5
32. 32.9.6 × 3.3 — where does the decimal point go? (a) 316.8 (b) 0.3168 (c) 3.168 (d) 31.68
33. 33.8.4 × 18 — where does the decimal point go? (a) 151.2 (b) 1512 (c) 15.12 (d) 1.512
34. 34.0.73 × 0.2 — where does the decimal point go? (a) 0.0146 (b) 0.00146 (c) 1.46 (d) 0.146
35. 35.2.6 × 3 — where does the decimal point go? (a) 0.078 (b) 0.78 (c) 78 (d) 7.8
36. 36.0.49 × 9 — where does the decimal point go? (a) 4.41 (b) 44.1 (c) 0.0441 (d) 0.441
37. 37.5.9 × 1.6 — where does the decimal point go? (a) 0.944 (b) 9.44 (c) 0.0944 (d) 94.4
38. 38.0.35 × 3 — where does the decimal point go? (a) 1.05 (b) 0.0105 (c) 0.105 (d) 10.5
39. 39.6.8 × 37 — where does the decimal point go? (a) 25.16 (b) 2.516 (c) 251.6 (d) 2516
40. 40.3.9 × 3 — where does the decimal point go? (a) 11.7 (b) 1.17 (c) 0.117 (d) 117

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