Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 935 · 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. 1.5.1 × 0.9 — where does the decimal point go? (a) 4.59 (b) 0.459 (c) 0.0459 (d) 45.9
2. 2.0.73 × 0.7 — where does the decimal point go? (a) 0.00511 (b) 0.0511 (c) 5.11 (d) 0.511
3. 3.0.36 × 0.4 — where does the decimal point go? (a) 0.00144 (b) 1.44 (c) 0.0144 (d) 0.144
4. 4.0.91 × 0.3 — where does the decimal point go? (a) 0.273 (b) 0.00273 (c) 0.0273 (d) 2.73
5. 5.6.3 × 5 — where does the decimal point go? (a) 31.5 (b) 3.15 (c) 315 (d) 0.315
6. 6.9.3 × 1.7 — where does the decimal point go? (a) 1.581 (b) 15.81 (c) 0.1581 (d) 158.1
7. 7.2.2 × 0.2 — where does the decimal point go? (a) 0.0044 (b) 0.44 (c) 4.4 (d) 0.044
8. 8.0.42 × 14 — where does the decimal point go? (a) 0.0588 (b) 0.588 (c) 58.8 (d) 5.88
9. 9.7.6 × 1.9 — where does the decimal point go? (a) 1.444 (b) 0.1444 (c) 144.4 (d) 14.44
10. 10.8.8 × 22 — where does the decimal point go? (a) 19.36 (b) 193.6 (c) 1936 (d) 1.936
11. 11.7.9 × 0.6 — where does the decimal point go? (a) 0.0474 (b) 47.4 (c) 0.474 (d) 4.74
12. 12.0.19 × 1.1 — where does the decimal point go? (a) 0.00209 (b) 0.0209 (c) 0.209 (d) 2.09
13. 13.4.3 × 0.3 — where does the decimal point go? (a) 1.29 (b) 0.129 (c) 0.0129 (d) 12.9
14. 14.5.1 × 41 — where does the decimal point go? (a) 2.091 (b) 2091 (c) 20.91 (d) 209.1
15. 15.0.37 × 0.8 — where does the decimal point go? (a) 0.296 (b) 2.96 (c) 0.0296 (d) 0.00296
16. 16.0.44 × 8 — where does the decimal point go? (a) 0.0352 (b) 35.2 (c) 0.352 (d) 3.52
17. 17.4.1 × 0.9 — where does the decimal point go? (a) 0.369 (b) 36.9 (c) 3.69 (d) 0.0369
18. 18.0.36 × 26 — where does the decimal point go? (a) 93.6 (b) 0.0936 (c) 9.36 (d) 0.936
19. 19.0.24 × 48 — where does the decimal point go? (a) 115.2 (b) 1.152 (c) 0.1152 (d) 11.52
20. 20.0.46 × 3.3 — where does the decimal point go? (a) 15.18 (b) 0.1518 (c) 1.518 (d) 0.01518
21. 21.0.23 × 5 — where does the decimal point go? (a) 1.15 (b) 11.5 (c) 0.0115 (d) 0.115
22. 22.5.8 × 1.7 — where does the decimal point go? (a) 0.0986 (b) 9.86 (c) 0.986 (d) 98.6
23. 23.0.68 × 4 — where does the decimal point go? (a) 0.272 (b) 27.2 (c) 2.72 (d) 0.0272
24. 24.3.9 × 0.6 — where does the decimal point go? (a) 23.4 (b) 0.0234 (c) 2.34 (d) 0.234
25. 25.5.6 × 21 — where does the decimal point go? (a) 1176 (b) 117.6 (c) 11.76 (d) 1.176
26. 26.0.21 × 0.5 — where does the decimal point go? (a) 0.105 (b) 1.05 (c) 0.00105 (d) 0.0105
27. 27.1.2 × 3 — where does the decimal point go? (a) 0.36 (b) 36 (c) 3.6 (d) 0.036
28. 28.0.16 × 7 — where does the decimal point go? (a) 0.0112 (b) 1.12 (c) 11.2 (d) 0.112
29. 29.0.62 × 1.9 — where does the decimal point go? (a) 1.178 (b) 0.1178 (c) 0.01178 (d) 11.78
30. 30.3.7 × 0.3 — where does the decimal point go? (a) 0.0111 (b) 1.11 (c) 0.111 (d) 11.1
31. 31.0.54 × 16 — where does the decimal point go? (a) 0.0864 (b) 86.4 (c) 0.864 (d) 8.64
32. 32.0.69 × 4 — where does the decimal point go? (a) 2.76 (b) 0.0276 (c) 27.6 (d) 0.276
33. 33.0.89 × 6 — where does the decimal point go? (a) 5.34 (b) 0.534 (c) 53.4 (d) 0.0534
34. 34.0.33 × 21 — where does the decimal point go? (a) 0.0693 (b) 69.3 (c) 0.693 (d) 6.93
35. 35.6.8 × 3 — where does the decimal point go? (a) 204 (b) 20.4 (c) 2.04 (d) 0.204
36. 36.5.9 × 48 — where does the decimal point go? (a) 283.2 (b) 2832 (c) 2.832 (d) 28.32
37. 37.0.34 × 0.9 — where does the decimal point go? (a) 0.306 (b) 0.00306 (c) 0.0306 (d) 3.06
38. 38.3.9 × 42 — where does the decimal point go? (a) 1.638 (b) 163.8 (c) 1638 (d) 16.38
39. 39.6.7 × 7 — where does the decimal point go? (a) 469 (b) 0.469 (c) 4.69 (d) 46.9
40. 40.5.9 × 2.3 — where does the decimal point go? (a) 1.357 (b) 135.7 (c) 0.1357 (d) 13.57

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