Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 918 · 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. 1.6.5 × 9 — where does the decimal point go? (a) 5.85 (b) 585 (c) 0.585 (d) 58.5
2. 2.2.4 × 0.2 — where does the decimal point go? (a) 0.48 (b) 4.8 (c) 0.0048 (d) 0.048
3. 3.6.3 × 6 — where does the decimal point go? (a) 3.78 (b) 0.378 (c) 378 (d) 37.8
4. 4.2.3 × 1.9 — where does the decimal point go? (a) 4.37 (b) 43.7 (c) 0.0437 (d) 0.437
5. 5.0.34 × 4 — where does the decimal point go? (a) 1.36 (b) 13.6 (c) 0.0136 (d) 0.136
6. 6.0.44 × 4.1 — where does the decimal point go? (a) 0.01804 (b) 0.1804 (c) 18.04 (d) 1.804
7. 7.4.8 × 9 — where does the decimal point go? (a) 4.32 (b) 432 (c) 43.2 (d) 0.432
8. 8.0.42 × 13 — where does the decimal point go? (a) 5.46 (b) 54.6 (c) 0.0546 (d) 0.546
9. 9.0.73 × 0.7 — where does the decimal point go? (a) 0.0511 (b) 0.511 (c) 0.00511 (d) 5.11
10. 10.6.9 × 4.1 — where does the decimal point go? (a) 2.829 (b) 0.2829 (c) 28.29 (d) 282.9
11. 11.4.2 × 0.7 — where does the decimal point go? (a) 2.94 (b) 0.0294 (c) 29.4 (d) 0.294
12. 12.0.27 × 1.6 — where does the decimal point go? (a) 0.432 (b) 0.00432 (c) 4.32 (d) 0.0432
13. 13.0.75 × 3.3 — where does the decimal point go? (a) 0.02475 (b) 2.475 (c) 24.75 (d) 0.2475
14. 14.0.48 × 9 — where does the decimal point go? (a) 4.32 (b) 0.432 (c) 0.0432 (d) 43.2
15. 15.1.3 × 19 — where does the decimal point go? (a) 24.7 (b) 247 (c) 0.247 (d) 2.47
16. 16.0.98 × 0.7 — where does the decimal point go? (a) 0.686 (b) 0.0686 (c) 0.00686 (d) 6.86
17. 17.6.9 × 0.7 — where does the decimal point go? (a) 4.83 (b) 0.483 (c) 0.0483 (d) 48.3
18. 18.0.89 × 9 — where does the decimal point go? (a) 0.0801 (b) 0.801 (c) 8.01 (d) 80.1
19. 19.5.8 × 3.4 — where does the decimal point go? (a) 19.72 (b) 1.972 (c) 197.2 (d) 0.1972
20. 20.0.54 × 2.3 — where does the decimal point go? (a) 0.1242 (b) 1.242 (c) 0.01242 (d) 12.42
21. 21.0.98 × 0.4 — where does the decimal point go? (a) 0.00392 (b) 3.92 (c) 0.392 (d) 0.0392
22. 22.5.1 × 39 — where does the decimal point go? (a) 198.9 (b) 1989 (c) 19.89 (d) 1.989
23. 23.9.3 × 5 — where does the decimal point go? (a) 46.5 (b) 4.65 (c) 465 (d) 0.465
24. 24.0.51 × 0.2 — where does the decimal point go? (a) 0.00102 (b) 0.102 (c) 1.02 (d) 0.0102
25. 25.0.43 × 5 — where does the decimal point go? (a) 0.215 (b) 2.15 (c) 21.5 (d) 0.0215
26. 26.7.1 × 18 — where does the decimal point go? (a) 1278 (b) 12.78 (c) 1.278 (d) 127.8
27. 27.0.81 × 31 — where does the decimal point go? (a) 25.11 (b) 2.511 (c) 251.1 (d) 0.2511
28. 28.2.2 × 0.7 — where does the decimal point go? (a) 0.0154 (b) 15.4 (c) 1.54 (d) 0.154
29. 29.4.6 × 1.9 — where does the decimal point go? (a) 0.874 (b) 87.4 (c) 8.74 (d) 0.0874
30. 30.0.12 × 0.3 — where does the decimal point go? (a) 0.036 (b) 0.0036 (c) 0.36 (d) 0.00036
31. 31.1.7 × 6 — where does the decimal point go? (a) 0.102 (b) 1.02 (c) 10.2 (d) 102
32. 32.0.79 × 1.3 — where does the decimal point go? (a) 10.27 (b) 0.1027 (c) 0.01027 (d) 1.027
33. 33.0.12 × 0.6 — where does the decimal point go? (a) 0.0072 (b) 0.072 (c) 0.72 (d) 0.00072
34. 34.8.2 × 7 — where does the decimal point go? (a) 5.74 (b) 57.4 (c) 574 (d) 0.574
35. 35.4.1 × 6 — where does the decimal point go? (a) 24.6 (b) 2.46 (c) 246 (d) 0.246
36. 36.0.77 × 0.8 — where does the decimal point go? (a) 0.00616 (b) 0.616 (c) 0.0616 (d) 6.16
37. 37.2.1 × 2.8 — where does the decimal point go? (a) 5.88 (b) 58.8 (c) 0.0588 (d) 0.588
38. 38.0.92 × 14 — where does the decimal point go? (a) 128.8 (b) 0.1288 (c) 12.88 (d) 1.288
39. 39.0.28 × 6 — where does the decimal point go? (a) 0.0168 (b) 16.8 (c) 0.168 (d) 1.68
40. 40.2.3 × 0.6 — where does the decimal point go? (a) 0.138 (b) 13.8 (c) 1.38 (d) 0.0138

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