Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 885 · 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. 1.0.99 × 31 — where does the decimal point go? (a) 30.69 (b) 306.9 (c) 3.069 (d) 0.3069
2. 2.5.8 × 3 — where does the decimal point go? (a) 1.74 (b) 0.174 (c) 174 (d) 17.4
3. 3.0.48 × 1.7 — where does the decimal point go? (a) 0.0816 (b) 0.00816 (c) 8.16 (d) 0.816
4. 4.0.29 × 1.1 — where does the decimal point go? (a) 0.319 (b) 0.0319 (c) 0.00319 (d) 3.19
5. 5.6.3 × 0.5 — where does the decimal point go? (a) 0.315 (b) 31.5 (c) 0.0315 (d) 3.15
6. 6.9.2 × 0.7 — where does the decimal point go? (a) 6.44 (b) 0.644 (c) 0.0644 (d) 64.4
7. 7.2.9 × 1.4 — where does the decimal point go? (a) 4.06 (b) 40.6 (c) 0.406 (d) 0.0406
8. 8.3.3 × 7 — where does the decimal point go? (a) 2.31 (b) 23.1 (c) 0.231 (d) 231
9. 9.8.1 × 1.1 — where does the decimal point go? (a) 0.0891 (b) 89.1 (c) 0.891 (d) 8.91
10. 10.9.4 × 0.2 — where does the decimal point go? (a) 18.8 (b) 0.0188 (c) 0.188 (d) 1.88
11. 11.0.24 × 6 — where does the decimal point go? (a) 0.0144 (b) 14.4 (c) 0.144 (d) 1.44
12. 12.0.51 × 9 — where does the decimal point go? (a) 0.0459 (b) 4.59 (c) 45.9 (d) 0.459
13. 13.1.6 × 6 — where does the decimal point go? (a) 96 (b) 9.6 (c) 0.96 (d) 0.096
14. 14.0.16 × 0.4 — where does the decimal point go? (a) 0.64 (b) 0.00064 (c) 0.064 (d) 0.0064
15. 15.3.9 × 47 — where does the decimal point go? (a) 1.833 (b) 18.33 (c) 1833 (d) 183.3
16. 16.6.3 × 4.3 — where does the decimal point go? (a) 27.09 (b) 270.9 (c) 2.709 (d) 0.2709
17. 17.0.24 × 7 — where does the decimal point go? (a) 16.8 (b) 0.0168 (c) 1.68 (d) 0.168
18. 18.9.7 × 1.3 — where does the decimal point go? (a) 12.61 (b) 126.1 (c) 1.261 (d) 0.1261
19. 19.1.4 × 24 — where does the decimal point go? (a) 33.6 (b) 0.336 (c) 336 (d) 3.36
20. 20.0.67 × 0.2 — where does the decimal point go? (a) 0.0134 (b) 1.34 (c) 0.134 (d) 0.00134
21. 21.3.7 × 0.2 — where does the decimal point go? (a) 7.4 (b) 0.74 (c) 0.0074 (d) 0.074
22. 22.6.9 × 0.8 — where does the decimal point go? (a) 55.2 (b) 5.52 (c) 0.0552 (d) 0.552
23. 23.1.4 × 0.2 — where does the decimal point go? (a) 2.8 (b) 0.28 (c) 0.028 (d) 0.0028
24. 24.7.6 × 1.3 — where does the decimal point go? (a) 0.988 (b) 98.8 (c) 9.88 (d) 0.0988
25. 25.2.2 × 4.9 — where does the decimal point go? (a) 0.1078 (b) 10.78 (c) 1.078 (d) 107.8
26. 26.4.3 × 9 — where does the decimal point go? (a) 0.387 (b) 38.7 (c) 387 (d) 3.87
27. 27.0.59 × 9 — where does the decimal point go? (a) 0.0531 (b) 53.1 (c) 0.531 (d) 5.31
28. 28.7.3 × 8 — where does the decimal point go? (a) 584 (b) 5.84 (c) 0.584 (d) 58.4
29. 29.8.9 × 2 — where does the decimal point go? (a) 17.8 (b) 0.178 (c) 178 (d) 1.78
30. 30.5.6 × 0.2 — where does the decimal point go? (a) 0.112 (b) 11.2 (c) 1.12 (d) 0.0112
31. 31.2.5 × 9 — where does the decimal point go? (a) 225 (b) 22.5 (c) 2.25 (d) 0.225
32. 32.0.17 × 11 — where does the decimal point go? (a) 0.187 (b) 0.0187 (c) 18.7 (d) 1.87
33. 33.4.1 × 4 — where does the decimal point go? (a) 0.164 (b) 164 (c) 1.64 (d) 16.4
34. 34.5.1 × 5 — where does the decimal point go? (a) 25.5 (b) 0.255 (c) 2.55 (d) 255
35. 35.4.9 × 0.7 — where does the decimal point go? (a) 0.0343 (b) 34.3 (c) 0.343 (d) 3.43
36. 36.0.28 × 48 — where does the decimal point go? (a) 0.1344 (b) 13.44 (c) 1.344 (d) 134.4
37. 37.5.7 × 35 — where does the decimal point go? (a) 19.95 (b) 1.995 (c) 1995 (d) 199.5
38. 38.7.7 × 14 — where does the decimal point go? (a) 107.8 (b) 10.78 (c) 1.078 (d) 1078
39. 39.7.1 × 7 — where does the decimal point go? (a) 0.497 (b) 49.7 (c) 497 (d) 4.97
40. 40.0.57 × 46 — where does the decimal point go? (a) 26.22 (b) 2.622 (c) 0.2622 (d) 262.2

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