Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 537 · 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. 1.8.3 × 38 — where does the decimal point go? (a) 31.54 (b) 3.154 (c) 3154 (d) 315.4
2. 2.1.5 × 0.9 — where does the decimal point go? (a) 1.35 (b) 0.135 (c) 0.0135 (d) 13.5
3. 3.5.7 × 0.5 — where does the decimal point go? (a) 0.285 (b) 2.85 (c) 0.0285 (d) 28.5
4. 4.3.1 × 0.5 — where does the decimal point go? (a) 0.0155 (b) 0.155 (c) 1.55 (d) 15.5
5. 5.0.84 × 9 — where does the decimal point go? (a) 0.756 (b) 0.0756 (c) 7.56 (d) 75.6
6. 6.0.62 × 0.2 — where does the decimal point go? (a) 0.00124 (b) 0.0124 (c) 1.24 (d) 0.124
7. 7.9.3 × 0.3 — where does the decimal point go? (a) 0.279 (b) 2.79 (c) 0.0279 (d) 27.9
8. 8.6.2 × 2.3 — where does the decimal point go? (a) 142.6 (b) 1.426 (c) 14.26 (d) 0.1426
9. 9.0.87 × 2.2 — where does the decimal point go? (a) 19.14 (b) 0.01914 (c) 1.914 (d) 0.1914
10. 10.0.84 × 0.7 — where does the decimal point go? (a) 0.0588 (b) 5.88 (c) 0.588 (d) 0.00588
11. 11.4.1 × 4 — where does the decimal point go? (a) 0.164 (b) 1.64 (c) 16.4 (d) 164
12. 12.2.1 × 0.3 — where does the decimal point go? (a) 0.063 (b) 0.0063 (c) 6.3 (d) 0.63
13. 13.0.64 × 2.1 — where does the decimal point go? (a) 0.01344 (b) 0.1344 (c) 13.44 (d) 1.344
14. 14.2.8 × 22 — where does the decimal point go? (a) 0.616 (b) 616 (c) 6.16 (d) 61.6
15. 15.4.4 × 9 — where does the decimal point go? (a) 39.6 (b) 3.96 (c) 396 (d) 0.396
16. 16.0.25 × 3 — where does the decimal point go? (a) 0.075 (b) 0.0075 (c) 7.5 (d) 0.75
17. 17.0.97 × 0.9 — where does the decimal point go? (a) 0.0873 (b) 8.73 (c) 0.00873 (d) 0.873
18. 18.0.89 × 0.6 — where does the decimal point go? (a) 5.34 (b) 0.00534 (c) 0.0534 (d) 0.534
19. 19.0.57 × 4.6 — where does the decimal point go? (a) 0.02622 (b) 26.22 (c) 2.622 (d) 0.2622
20. 20.0.58 × 0.8 — where does the decimal point go? (a) 0.00464 (b) 0.464 (c) 4.64 (d) 0.0464
21. 21.0.28 × 6 — where does the decimal point go? (a) 0.0168 (b) 0.168 (c) 16.8 (d) 1.68
22. 22.0.56 × 2 — where does the decimal point go? (a) 0.112 (b) 1.12 (c) 0.0112 (d) 11.2
23. 23.0.49 × 2 — where does the decimal point go? (a) 0.0098 (b) 9.8 (c) 0.98 (d) 0.098
24. 24.0.91 × 3.2 — where does the decimal point go? (a) 29.12 (b) 0.2912 (c) 2.912 (d) 0.02912
25. 25.5.5 × 4.7 — where does the decimal point go? (a) 258.5 (b) 25.85 (c) 2.585 (d) 0.2585
26. 26.0.85 × 4.9 — where does the decimal point go? (a) 0.04165 (b) 4.165 (c) 41.65 (d) 0.4165
27. 27.0.17 × 0.3 — where does the decimal point go? (a) 0.51 (b) 0.00051 (c) 0.051 (d) 0.0051
28. 28.0.83 × 48 — where does the decimal point go? (a) 0.3984 (b) 398.4 (c) 3.984 (d) 39.84
29. 29.1.2 × 2.4 — where does the decimal point go? (a) 0.0288 (b) 0.288 (c) 28.8 (d) 2.88
30. 30.9.6 × 4 — where does the decimal point go? (a) 0.384 (b) 384 (c) 38.4 (d) 3.84
31. 31.5.1 × 1.4 — where does the decimal point go? (a) 0.0714 (b) 7.14 (c) 71.4 (d) 0.714
32. 32.0.68 × 0.9 — where does the decimal point go? (a) 0.00612 (b) 6.12 (c) 0.612 (d) 0.0612
33. 33.0.97 × 5 — where does the decimal point go? (a) 4.85 (b) 48.5 (c) 0.485 (d) 0.0485
34. 34.8.7 × 23 — where does the decimal point go? (a) 2.001 (b) 20.01 (c) 2001 (d) 200.1
35. 35.6.9 × 0.3 — where does the decimal point go? (a) 0.0207 (b) 20.7 (c) 2.07 (d) 0.207
36. 36.3.4 × 12 — where does the decimal point go? (a) 408 (b) 40.8 (c) 0.408 (d) 4.08
37. 37.9.8 × 0.4 — where does the decimal point go? (a) 0.0392 (b) 39.2 (c) 0.392 (d) 3.92
38. 38.0.13 × 2.6 — where does the decimal point go? (a) 0.338 (b) 0.00338 (c) 3.38 (d) 0.0338
39. 39.9.8 × 8 — where does the decimal point go? (a) 0.784 (b) 78.4 (c) 7.84 (d) 784
40. 40.0.41 × 4.5 — where does the decimal point go? (a) 1.845 (b) 18.45 (c) 0.1845 (d) 0.01845

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