Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 262 · 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. 1.8.4 × 21 — where does the decimal point go? (a) 17.64 (b) 1764 (c) 1.764 (d) 176.4
2. 2.0.42 × 9 — where does the decimal point go? (a) 37.8 (b) 3.78 (c) 0.0378 (d) 0.378
3. 3.0.57 × 2 — where does the decimal point go? (a) 0.0114 (b) 0.114 (c) 1.14 (d) 11.4
4. 4.4.4 × 3.6 — where does the decimal point go? (a) 1.584 (b) 158.4 (c) 15.84 (d) 0.1584
5. 5.8.3 × 1.5 — where does the decimal point go? (a) 1.245 (b) 124.5 (c) 0.1245 (d) 12.45
6. 6.9.2 × 9 — where does the decimal point go? (a) 0.828 (b) 82.8 (c) 828 (d) 8.28
7. 7.0.55 × 9 — where does the decimal point go? (a) 0.495 (b) 4.95 (c) 49.5 (d) 0.0495
8. 8.3.1 × 16 — where does the decimal point go? (a) 4.96 (b) 49.6 (c) 0.496 (d) 496
9. 9.0.31 × 35 — where does the decimal point go? (a) 10.85 (b) 0.1085 (c) 108.5 (d) 1.085
10. 10.3.4 × 4.6 — where does the decimal point go? (a) 0.1564 (b) 156.4 (c) 1.564 (d) 15.64
11. 11.2.8 × 46 — where does the decimal point go? (a) 12.88 (b) 1.288 (c) 128.8 (d) 1288
12. 12.0.48 × 0.4 — where does the decimal point go? (a) 0.00192 (b) 0.192 (c) 0.0192 (d) 1.92
13. 13.4.3 × 0.6 — where does the decimal point go? (a) 25.8 (b) 0.258 (c) 2.58 (d) 0.0258
14. 14.0.56 × 28 — where does the decimal point go? (a) 15.68 (b) 0.1568 (c) 156.8 (d) 1.568
15. 15.8.3 × 8 — where does the decimal point go? (a) 66.4 (b) 6.64 (c) 0.664 (d) 664
16. 16.0.48 × 0.3 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 0.00144 (d) 0.0144
17. 17.0.69 × 1.4 — where does the decimal point go? (a) 0.0966 (b) 0.966 (c) 9.66 (d) 0.00966
18. 18.3.7 × 2.7 — where does the decimal point go? (a) 0.0999 (b) 0.999 (c) 99.9 (d) 9.99
19. 19.8.1 × 6 — where does the decimal point go? (a) 48.6 (b) 486 (c) 4.86 (d) 0.486
20. 20.0.19 × 6 — where does the decimal point go? (a) 0.114 (b) 0.0114 (c) 1.14 (d) 11.4
21. 21.5.1 × 43 — where does the decimal point go? (a) 21.93 (b) 2.193 (c) 2193 (d) 219.3
22. 22.3.1 × 17 — where does the decimal point go? (a) 0.527 (b) 5.27 (c) 527 (d) 52.7
23. 23.0.15 × 43 — where does the decimal point go? (a) 0.0645 (b) 64.5 (c) 0.645 (d) 6.45
24. 24.8.7 × 19 — where does the decimal point go? (a) 1653 (b) 16.53 (c) 1.653 (d) 165.3
25. 25.9.2 × 0.8 — where does the decimal point go? (a) 73.6 (b) 7.36 (c) 0.736 (d) 0.0736
26. 26.0.65 × 0.9 — where does the decimal point go? (a) 0.00585 (b) 5.85 (c) 0.585 (d) 0.0585
27. 27.0.34 × 0.7 — where does the decimal point go? (a) 0.238 (b) 0.0238 (c) 2.38 (d) 0.00238
28. 28.0.94 × 9 — where does the decimal point go? (a) 0.846 (b) 8.46 (c) 0.0846 (d) 84.6
29. 29.0.29 × 6 — where does the decimal point go? (a) 1.74 (b) 0.0174 (c) 0.174 (d) 17.4
30. 30.9.1 × 42 — where does the decimal point go? (a) 382.2 (b) 38.22 (c) 3.822 (d) 3822
31. 31.0.74 × 1.7 — where does the decimal point go? (a) 0.01258 (b) 0.1258 (c) 12.58 (d) 1.258
32. 32.5.5 × 1.9 — where does the decimal point go? (a) 0.1045 (b) 1.045 (c) 104.5 (d) 10.45
33. 33.0.69 × 0.6 — where does the decimal point go? (a) 0.0414 (b) 0.414 (c) 0.00414 (d) 4.14
34. 34.0.14 × 0.9 — where does the decimal point go? (a) 0.126 (b) 0.0126 (c) 0.00126 (d) 1.26
35. 35.7.6 × 29 — where does the decimal point go? (a) 22.04 (b) 2204 (c) 2.204 (d) 220.4
36. 36.0.21 × 2.3 — where does the decimal point go? (a) 0.00483 (b) 0.483 (c) 0.0483 (d) 4.83
37. 37.0.48 × 29 — where does the decimal point go? (a) 13.92 (b) 0.1392 (c) 1.392 (d) 139.2
38. 38.1.3 × 4.8 — where does the decimal point go? (a) 6.24 (b) 0.0624 (c) 62.4 (d) 0.624
39. 39.0.52 × 37 — where does the decimal point go? (a) 19.24 (b) 1.924 (c) 192.4 (d) 0.1924
40. 40.0.49 × 2 — where does the decimal point go? (a) 0.98 (b) 9.8 (c) 0.098 (d) 0.0098

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