Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 845 · 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. 1.9.4 × 3.2 — where does the decimal point go? (a) 0.3008 (b) 300.8 (c) 30.08 (d) 3.008
2. 2.0.62 × 0.9 — where does the decimal point go? (a) 0.00558 (b) 0.558 (c) 0.0558 (d) 5.58
3. 3.0.99 × 2.9 — where does the decimal point go? (a) 0.02871 (b) 28.71 (c) 0.2871 (d) 2.871
4. 4.6.8 × 31 — where does the decimal point go? (a) 21.08 (b) 2.108 (c) 210.8 (d) 2108
5. 5.2.8 × 22 — where does the decimal point go? (a) 616 (b) 0.616 (c) 61.6 (d) 6.16
6. 6.6.5 × 0.7 — where does the decimal point go? (a) 0.0455 (b) 4.55 (c) 45.5 (d) 0.455
7. 7.0.14 × 0.3 — where does the decimal point go? (a) 0.00042 (b) 0.0042 (c) 0.042 (d) 0.42
8. 8.0.77 × 0.2 — where does the decimal point go? (a) 0.154 (b) 1.54 (c) 0.00154 (d) 0.0154
9. 9.0.21 × 8 — where does the decimal point go? (a) 16.8 (b) 0.168 (c) 1.68 (d) 0.0168
10. 10.0.16 × 0.2 — where does the decimal point go? (a) 0.32 (b) 0.032 (c) 0.0032 (d) 0.00032
11. 11.6.8 × 8 — where does the decimal point go? (a) 0.544 (b) 5.44 (c) 54.4 (d) 544
12. 12.0.95 × 3.3 — where does the decimal point go? (a) 3.135 (b) 0.3135 (c) 0.03135 (d) 31.35
13. 13.5.4 × 7 — where does the decimal point go? (a) 37.8 (b) 3.78 (c) 378 (d) 0.378
14. 14.0.58 × 2.3 — where does the decimal point go? (a) 1.334 (b) 13.34 (c) 0.1334 (d) 0.01334
15. 15.7.8 × 4.6 — where does the decimal point go? (a) 35.88 (b) 3.588 (c) 0.3588 (d) 358.8
16. 16.0.55 × 45 — where does the decimal point go? (a) 24.75 (b) 2.475 (c) 247.5 (d) 0.2475
17. 17.0.26 × 0.8 — where does the decimal point go? (a) 0.00208 (b) 2.08 (c) 0.208 (d) 0.0208
18. 18.3.8 × 0.7 — where does the decimal point go? (a) 2.66 (b) 26.6 (c) 0.0266 (d) 0.266
19. 19.5.3 × 26 — where does the decimal point go? (a) 1.378 (b) 13.78 (c) 1378 (d) 137.8
20. 20.3.3 × 1.3 — where does the decimal point go? (a) 42.9 (b) 0.429 (c) 0.0429 (d) 4.29
21. 21.6.9 × 3 — where does the decimal point go? (a) 207 (b) 0.207 (c) 20.7 (d) 2.07
22. 22.6.1 × 0.8 — where does the decimal point go? (a) 0.488 (b) 48.8 (c) 4.88 (d) 0.0488
23. 23.0.86 × 22 — where does the decimal point go? (a) 18.92 (b) 189.2 (c) 0.1892 (d) 1.892
24. 24.0.97 × 5 — where does the decimal point go? (a) 0.0485 (b) 0.485 (c) 4.85 (d) 48.5
25. 25.8.2 × 2 — where does the decimal point go? (a) 16.4 (b) 1.64 (c) 164 (d) 0.164
26. 26.5.1 × 2.9 — where does the decimal point go? (a) 14.79 (b) 1.479 (c) 147.9 (d) 0.1479
27. 27.3.2 × 27 — where does the decimal point go? (a) 86.4 (b) 864 (c) 8.64 (d) 0.864
28. 28.9.9 × 2 — where does the decimal point go? (a) 19.8 (b) 1.98 (c) 0.198 (d) 198
29. 29.3.7 × 9 — where does the decimal point go? (a) 33.3 (b) 0.333 (c) 333 (d) 3.33
30. 30.4.4 × 4.9 — where does the decimal point go? (a) 215.6 (b) 21.56 (c) 2.156 (d) 0.2156
31. 31.0.27 × 7 — where does the decimal point go? (a) 1.89 (b) 18.9 (c) 0.189 (d) 0.0189
32. 32.8.6 × 7 — where does the decimal point go? (a) 0.602 (b) 60.2 (c) 602 (d) 6.02
33. 33.0.97 × 0.8 — where does the decimal point go? (a) 0.776 (b) 0.0776 (c) 7.76 (d) 0.00776
34. 34.0.32 × 2.8 — where does the decimal point go? (a) 0.0896 (b) 0.896 (c) 0.00896 (d) 8.96
35. 35.4.7 × 26 — where does the decimal point go? (a) 1222 (b) 1.222 (c) 12.22 (d) 122.2
36. 36.3.7 × 2.1 — where does the decimal point go? (a) 0.0777 (b) 77.7 (c) 7.77 (d) 0.777
37. 37.8.4 × 6 — where does the decimal point go? (a) 5.04 (b) 0.504 (c) 50.4 (d) 504
38. 38.0.38 × 0.4 — where does the decimal point go? (a) 1.52 (b) 0.00152 (c) 0.0152 (d) 0.152
39. 39.7.1 × 2 — where does the decimal point go? (a) 1.42 (b) 14.2 (c) 142 (d) 0.142
40. 40.0.93 × 3.7 — where does the decimal point go? (a) 34.41 (b) 0.3441 (c) 3.441 (d) 0.03441

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