Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 521 · 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. 1.9.9 × 0.3 — where does the decimal point go? (a) 29.7 (b) 0.297 (c) 2.97 (d) 0.0297
2. 2.0.29 × 29 — where does the decimal point go? (a) 0.841 (b) 0.0841 (c) 8.41 (d) 84.1
3. 3.0.63 × 0.2 — where does the decimal point go? (a) 0.00126 (b) 1.26 (c) 0.0126 (d) 0.126
4. 4.0.28 × 8 — where does the decimal point go? (a) 0.224 (b) 22.4 (c) 0.0224 (d) 2.24
5. 5.0.71 × 0.4 — where does the decimal point go? (a) 0.00284 (b) 0.0284 (c) 2.84 (d) 0.284
6. 6.0.12 × 3.1 — where does the decimal point go? (a) 3.72 (b) 0.00372 (c) 0.0372 (d) 0.372
7. 7.2.2 × 2.3 — where does the decimal point go? (a) 0.0506 (b) 0.506 (c) 5.06 (d) 50.6
8. 8.0.52 × 3.8 — where does the decimal point go? (a) 19.76 (b) 0.01976 (c) 1.976 (d) 0.1976
9. 9.8.7 × 3 — where does the decimal point go? (a) 26.1 (b) 0.261 (c) 2.61 (d) 261
10. 10.2.9 × 3.7 — where does the decimal point go? (a) 0.1073 (b) 107.3 (c) 10.73 (d) 1.073
11. 11.2.3 × 48 — where does the decimal point go? (a) 110.4 (b) 1.104 (c) 1104 (d) 11.04
12. 12.8.8 × 7 — where does the decimal point go? (a) 0.616 (b) 6.16 (c) 616 (d) 61.6
13. 13.0.48 × 8 — where does the decimal point go? (a) 0.0384 (b) 3.84 (c) 0.384 (d) 38.4
14. 14.0.44 × 2.1 — where does the decimal point go? (a) 0.0924 (b) 0.00924 (c) 9.24 (d) 0.924
15. 15.0.49 × 49 — where does the decimal point go? (a) 24.01 (b) 0.2401 (c) 2.401 (d) 240.1
16. 16.3.7 × 0.2 — where does the decimal point go? (a) 0.0074 (b) 0.74 (c) 0.074 (d) 7.4
17. 17.6.8 × 18 — where does the decimal point go? (a) 12.24 (b) 1.224 (c) 122.4 (d) 1224
18. 18.4.6 × 3.9 — where does the decimal point go? (a) 179.4 (b) 1.794 (c) 17.94 (d) 0.1794
19. 19.0.29 × 0.2 — where does the decimal point go? (a) 0.00058 (b) 0.058 (c) 0.58 (d) 0.0058
20. 20.0.55 × 0.3 — where does the decimal point go? (a) 0.00165 (b) 0.165 (c) 0.0165 (d) 1.65
21. 21.0.23 × 0.9 — where does the decimal point go? (a) 2.07 (b) 0.207 (c) 0.0207 (d) 0.00207
22. 22.1.9 × 0.3 — where does the decimal point go? (a) 0.57 (b) 5.7 (c) 0.0057 (d) 0.057
23. 23.6.6 × 2.8 — where does the decimal point go? (a) 0.1848 (b) 1.848 (c) 18.48 (d) 184.8
24. 24.1.2 × 1.9 — where does the decimal point go? (a) 22.8 (b) 2.28 (c) 0.0228 (d) 0.228
25. 25.0.95 × 3 — where does the decimal point go? (a) 28.5 (b) 0.285 (c) 2.85 (d) 0.0285
26. 26.1.7 × 8 — where does the decimal point go? (a) 1.36 (b) 136 (c) 13.6 (d) 0.136
27. 27.0.14 × 4.4 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 6.16 (d) 0.00616
28. 28.0.81 × 1.7 — where does the decimal point go? (a) 0.01377 (b) 0.1377 (c) 1.377 (d) 13.77
29. 29.2.3 × 2.7 — where does the decimal point go? (a) 0.621 (b) 62.1 (c) 0.0621 (d) 6.21
30. 30.5.3 × 27 — where does the decimal point go? (a) 1.431 (b) 1431 (c) 14.31 (d) 143.1
31. 31.0.45 × 4.5 — where does the decimal point go? (a) 0.2025 (b) 2.025 (c) 0.02025 (d) 20.25
32. 32.0.14 × 4.6 — where does the decimal point go? (a) 6.44 (b) 0.644 (c) 0.00644 (d) 0.0644
33. 33.1.7 × 0.7 — where does the decimal point go? (a) 1.19 (b) 11.9 (c) 0.0119 (d) 0.119
34. 34.3.1 × 6 — where does the decimal point go? (a) 1.86 (b) 0.186 (c) 18.6 (d) 186
35. 35.0.42 × 4.7 — where does the decimal point go? (a) 0.1974 (b) 0.01974 (c) 19.74 (d) 1.974
36. 36.0.24 × 4 — where does the decimal point go? (a) 9.6 (b) 0.096 (c) 0.96 (d) 0.0096
37. 37.0.19 × 4.4 — where does the decimal point go? (a) 0.836 (b) 0.00836 (c) 8.36 (d) 0.0836
38. 38.7.2 × 4 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 28.8 (d) 288
39. 39.0.53 × 0.2 — where does the decimal point go? (a) 0.106 (b) 0.0106 (c) 0.00106 (d) 1.06
40. 40.0.89 × 29 — where does the decimal point go? (a) 258.1 (b) 0.2581 (c) 25.81 (d) 2.581

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