Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 431 · 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. 1.0.25 × 3.9 — where does the decimal point go? (a) 0.0975 (b) 0.00975 (c) 0.975 (d) 9.75
2. 2.6.4 × 3.1 — where does the decimal point go? (a) 1.984 (b) 198.4 (c) 0.1984 (d) 19.84
3. 3.0.29 × 17 — where does the decimal point go? (a) 0.0493 (b) 0.493 (c) 4.93 (d) 49.3
4. 4.7.6 × 0.4 — where does the decimal point go? (a) 3.04 (b) 0.0304 (c) 0.304 (d) 30.4
5. 5.0.67 × 19 — where does the decimal point go? (a) 0.1273 (b) 12.73 (c) 1.273 (d) 127.3
6. 6.0.97 × 0.7 — where does the decimal point go? (a) 0.679 (b) 0.00679 (c) 6.79 (d) 0.0679
7. 7.0.47 × 4.3 — where does the decimal point go? (a) 2.021 (b) 0.02021 (c) 20.21 (d) 0.2021
8. 8.2.1 × 0.9 — where does the decimal point go? (a) 0.0189 (b) 0.189 (c) 1.89 (d) 18.9
9. 9.7.7 × 8 — where does the decimal point go? (a) 616 (b) 61.6 (c) 6.16 (d) 0.616
10. 10.0.89 × 2 — where does the decimal point go? (a) 0.0178 (b) 17.8 (c) 0.178 (d) 1.78
11. 11.3.7 × 1.1 — where does the decimal point go? (a) 0.0407 (b) 0.407 (c) 4.07 (d) 40.7
12. 12.2.7 × 4.9 — where does the decimal point go? (a) 0.1323 (b) 1.323 (c) 13.23 (d) 132.3
13. 13.7.8 × 2.9 — where does the decimal point go? (a) 0.2262 (b) 2.262 (c) 226.2 (d) 22.62
14. 14.0.44 × 0.9 — where does the decimal point go? (a) 0.0396 (b) 0.00396 (c) 3.96 (d) 0.396
15. 15.0.77 × 7 — where does the decimal point go? (a) 0.539 (b) 0.0539 (c) 5.39 (d) 53.9
16. 16.3.2 × 4.9 — where does the decimal point go? (a) 1.568 (b) 15.68 (c) 156.8 (d) 0.1568
17. 17.4.8 × 4.4 — where does the decimal point go? (a) 0.2112 (b) 211.2 (c) 21.12 (d) 2.112
18. 18.9.5 × 29 — where does the decimal point go? (a) 275.5 (b) 2.755 (c) 27.55 (d) 2755
19. 19.0.31 × 45 — where does the decimal point go? (a) 1.395 (b) 13.95 (c) 0.1395 (d) 139.5
20. 20.6.3 × 0.2 — where does the decimal point go? (a) 0.0126 (b) 1.26 (c) 12.6 (d) 0.126
21. 21.6.8 × 8 — where does the decimal point go? (a) 54.4 (b) 5.44 (c) 0.544 (d) 544
22. 22.3.2 × 0.4 — where does the decimal point go? (a) 0.0128 (b) 0.128 (c) 12.8 (d) 1.28
23. 23.0.28 × 17 — where does the decimal point go? (a) 0.0476 (b) 0.476 (c) 4.76 (d) 47.6
24. 24.6.7 × 0.2 — where does the decimal point go? (a) 0.0134 (b) 1.34 (c) 0.134 (d) 13.4
25. 25.0.41 × 42 — where does the decimal point go? (a) 0.1722 (b) 17.22 (c) 172.2 (d) 1.722
26. 26.1.4 × 1.2 — where does the decimal point go? (a) 16.8 (b) 0.168 (c) 1.68 (d) 0.0168
27. 27.0.27 × 0.8 — where does the decimal point go? (a) 0.00216 (b) 0.216 (c) 2.16 (d) 0.0216
28. 28.0.38 × 0.2 — where does the decimal point go? (a) 0.00076 (b) 0.76 (c) 0.0076 (d) 0.076
29. 29.9.1 × 1.1 — where does the decimal point go? (a) 1.001 (b) 100.1 (c) 10.01 (d) 0.1001
30. 30.7.1 × 0.8 — where does the decimal point go? (a) 0.568 (b) 0.0568 (c) 5.68 (d) 56.8
31. 31.2.4 × 1.8 — where does the decimal point go? (a) 4.32 (b) 43.2 (c) 0.432 (d) 0.0432
32. 32.2.9 × 0.3 — where does the decimal point go? (a) 0.0087 (b) 0.87 (c) 8.7 (d) 0.087
33. 33.0.76 × 29 — where does the decimal point go? (a) 22.04 (b) 2.204 (c) 220.4 (d) 0.2204
34. 34.9.6 × 7 — where does the decimal point go? (a) 67.2 (b) 672 (c) 0.672 (d) 6.72
35. 35.0.51 × 0.4 — where does the decimal point go? (a) 0.204 (b) 2.04 (c) 0.00204 (d) 0.0204
36. 36.3.5 × 3 — where does the decimal point go? (a) 105 (b) 1.05 (c) 0.105 (d) 10.5
37. 37.6.9 × 26 — where does the decimal point go? (a) 179.4 (b) 1.794 (c) 1794 (d) 17.94
38. 38.0.39 × 8 — where does the decimal point go? (a) 0.0312 (b) 31.2 (c) 3.12 (d) 0.312
39. 39.0.26 × 6 — where does the decimal point go? (a) 1.56 (b) 15.6 (c) 0.0156 (d) 0.156
40. 40.1.9 × 45 — where does the decimal point go? (a) 855 (b) 8.55 (c) 0.855 (d) 85.5

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