Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 177 · 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. 1.8.9 × 9 — where does the decimal point go? (a) 80.1 (b) 0.801 (c) 801 (d) 8.01
2. 2.0.68 × 9 — where does the decimal point go? (a) 6.12 (b) 0.0612 (c) 61.2 (d) 0.612
3. 3.3.6 × 4.9 — where does the decimal point go? (a) 17.64 (b) 176.4 (c) 0.1764 (d) 1.764
4. 4.0.29 × 29 — where does the decimal point go? (a) 0.0841 (b) 0.841 (c) 8.41 (d) 84.1
5. 5.4.3 × 3.3 — where does the decimal point go? (a) 14.19 (b) 141.9 (c) 0.1419 (d) 1.419
6. 6.9.3 × 49 — where does the decimal point go? (a) 4.557 (b) 455.7 (c) 4557 (d) 45.57
7. 7.4.4 × 26 — where does the decimal point go? (a) 11.44 (b) 1.144 (c) 114.4 (d) 1144
8. 8.0.33 × 5 — where does the decimal point go? (a) 16.5 (b) 0.165 (c) 0.0165 (d) 1.65
9. 9.0.89 × 24 — where does the decimal point go? (a) 2.136 (b) 213.6 (c) 0.2136 (d) 21.36
10. 10.3.9 × 1.5 — where does the decimal point go? (a) 0.585 (b) 58.5 (c) 0.0585 (d) 5.85
11. 11.4.2 × 4.8 — where does the decimal point go? (a) 20.16 (b) 201.6 (c) 2.016 (d) 0.2016
12. 12.0.42 × 1.9 — where does the decimal point go? (a) 0.00798 (b) 0.798 (c) 0.0798 (d) 7.98
13. 13.8.5 × 1.5 — where does the decimal point go? (a) 127.5 (b) 1.275 (c) 0.1275 (d) 12.75
14. 14.8.2 × 47 — where does the decimal point go? (a) 3854 (b) 3.854 (c) 385.4 (d) 38.54
15. 15.0.98 × 3 — where does the decimal point go? (a) 0.294 (b) 29.4 (c) 2.94 (d) 0.0294
16. 16.7.9 × 0.9 — where does the decimal point go? (a) 7.11 (b) 71.1 (c) 0.0711 (d) 0.711
17. 17.5.4 × 3.7 — where does the decimal point go? (a) 0.1998 (b) 19.98 (c) 199.8 (d) 1.998
18. 18.8.2 × 0.3 — where does the decimal point go? (a) 0.246 (b) 2.46 (c) 0.0246 (d) 24.6
19. 19.0.42 × 34 — where does the decimal point go? (a) 142.8 (b) 0.1428 (c) 1.428 (d) 14.28
20. 20.0.22 × 0.9 — where does the decimal point go? (a) 1.98 (b) 0.198 (c) 0.0198 (d) 0.00198
21. 21.4.6 × 7 — where does the decimal point go? (a) 322 (b) 3.22 (c) 32.2 (d) 0.322
22. 22.0.83 × 0.3 — where does the decimal point go? (a) 0.249 (b) 0.0249 (c) 2.49 (d) 0.00249
23. 23.7.1 × 0.8 — where does the decimal point go? (a) 5.68 (b) 0.0568 (c) 0.568 (d) 56.8
24. 24.0.43 × 4 — where does the decimal point go? (a) 17.2 (b) 0.0172 (c) 1.72 (d) 0.172
25. 25.0.22 × 21 — where does the decimal point go? (a) 4.62 (b) 0.0462 (c) 46.2 (d) 0.462
26. 26.0.24 × 2.2 — where does the decimal point go? (a) 5.28 (b) 0.00528 (c) 0.528 (d) 0.0528
27. 27.0.49 × 1.1 — where does the decimal point go? (a) 0.539 (b) 0.0539 (c) 0.00539 (d) 5.39
28. 28.9.2 × 1.1 — where does the decimal point go? (a) 10.12 (b) 0.1012 (c) 1.012 (d) 101.2
29. 29.0.23 × 3.7 — where does the decimal point go? (a) 0.00851 (b) 8.51 (c) 0.851 (d) 0.0851
30. 30.3.3 × 48 — where does the decimal point go? (a) 1.584 (b) 158.4 (c) 1584 (d) 15.84
31. 31.0.96 × 0.9 — where does the decimal point go? (a) 0.0864 (b) 8.64 (c) 0.864 (d) 0.00864
32. 32.0.22 × 2.4 — where does the decimal point go? (a) 5.28 (b) 0.00528 (c) 0.0528 (d) 0.528
33. 33.2.9 × 39 — where does the decimal point go? (a) 113.1 (b) 1.131 (c) 11.31 (d) 1131
34. 34.3.1 × 0.3 — where does the decimal point go? (a) 0.0093 (b) 0.93 (c) 0.093 (d) 9.3
35. 35.8.1 × 9 — where does the decimal point go? (a) 0.729 (b) 729 (c) 7.29 (d) 72.9
36. 36.3.3 × 35 — where does the decimal point go? (a) 1155 (b) 115.5 (c) 11.55 (d) 1.155
37. 37.0.71 × 3 — where does the decimal point go? (a) 2.13 (b) 21.3 (c) 0.0213 (d) 0.213
38. 38.8.9 × 4.1 — where does the decimal point go? (a) 3.649 (b) 0.3649 (c) 36.49 (d) 364.9
39. 39.0.39 × 0.4 — where does the decimal point go? (a) 0.156 (b) 1.56 (c) 0.0156 (d) 0.00156
40. 40.0.98 × 0.2 — where does the decimal point go? (a) 0.196 (b) 0.0196 (c) 0.00196 (d) 1.96

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