Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 663 · 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. 1.0.67 × 0.5 — where does the decimal point go? (a) 0.335 (b) 0.0335 (c) 0.00335 (d) 3.35
2. 2.2.1 × 5 — where does the decimal point go? (a) 1.05 (b) 0.105 (c) 10.5 (d) 105
3. 3.0.66 × 2.1 — where does the decimal point go? (a) 0.01386 (b) 1.386 (c) 0.1386 (d) 13.86
4. 4.0.54 × 0.9 — where does the decimal point go? (a) 0.00486 (b) 0.486 (c) 0.0486 (d) 4.86
5. 5.4.4 × 9 — where does the decimal point go? (a) 3.96 (b) 39.6 (c) 396 (d) 0.396
6. 6.8.3 × 24 — where does the decimal point go? (a) 19.92 (b) 1992 (c) 1.992 (d) 199.2
7. 7.0.89 × 7 — where does the decimal point go? (a) 6.23 (b) 0.623 (c) 0.0623 (d) 62.3
8. 8.6.6 × 7 — where does the decimal point go? (a) 46.2 (b) 4.62 (c) 0.462 (d) 462
9. 9.0.74 × 4.8 — where does the decimal point go? (a) 0.03552 (b) 0.3552 (c) 3.552 (d) 35.52
10. 10.2.6 × 0.2 — where does the decimal point go? (a) 5.2 (b) 0.52 (c) 0.0052 (d) 0.052
11. 11.9.1 × 15 — where does the decimal point go? (a) 1365 (b) 136.5 (c) 1.365 (d) 13.65
12. 12.0.62 × 0.3 — where does the decimal point go? (a) 0.00186 (b) 1.86 (c) 0.186 (d) 0.0186
13. 13.9.5 × 2.3 — where does the decimal point go? (a) 218.5 (b) 2.185 (c) 21.85 (d) 0.2185
14. 14.3.2 × 4.7 — where does the decimal point go? (a) 150.4 (b) 1.504 (c) 15.04 (d) 0.1504
15. 15.0.62 × 7 — where does the decimal point go? (a) 43.4 (b) 0.434 (c) 0.0434 (d) 4.34
16. 16.0.21 × 7 — where does the decimal point go? (a) 1.47 (b) 0.147 (c) 0.0147 (d) 14.7
17. 17.0.57 × 6 — where does the decimal point go? (a) 0.342 (b) 34.2 (c) 3.42 (d) 0.0342
18. 18.0.37 × 2.1 — where does the decimal point go? (a) 0.00777 (b) 0.0777 (c) 0.777 (d) 7.77
19. 19.4.8 × 2.2 — where does the decimal point go? (a) 1.056 (b) 105.6 (c) 10.56 (d) 0.1056
20. 20.8.1 × 2.1 — where does the decimal point go? (a) 1.701 (b) 0.1701 (c) 170.1 (d) 17.01
21. 21.0.25 × 25 — where does the decimal point go? (a) 0.625 (b) 62.5 (c) 0.0625 (d) 6.25
22. 22.0.78 × 0.4 — where does the decimal point go? (a) 3.12 (b) 0.0312 (c) 0.312 (d) 0.00312
23. 23.0.52 × 32 — where does the decimal point go? (a) 0.1664 (b) 16.64 (c) 166.4 (d) 1.664
24. 24.0.82 × 9 — where does the decimal point go? (a) 7.38 (b) 0.0738 (c) 0.738 (d) 73.8
25. 25.0.36 × 4 — where does the decimal point go? (a) 0.0144 (b) 14.4 (c) 1.44 (d) 0.144
26. 26.9.3 × 4 — where does the decimal point go? (a) 0.372 (b) 372 (c) 37.2 (d) 3.72
27. 27.7.2 × 32 — where does the decimal point go? (a) 2.304 (b) 23.04 (c) 2304 (d) 230.4
28. 28.8.8 × 41 — where does the decimal point go? (a) 360.8 (b) 3.608 (c) 3608 (d) 36.08
29. 29.1.9 × 9 — where does the decimal point go? (a) 17.1 (b) 171 (c) 1.71 (d) 0.171
30. 30.0.52 × 1.4 — where does the decimal point go? (a) 0.00728 (b) 0.728 (c) 0.0728 (d) 7.28
31. 31.0.17 × 0.6 — where does the decimal point go? (a) 0.0102 (b) 0.00102 (c) 0.102 (d) 1.02
32. 32.1.3 × 0.6 — where does the decimal point go? (a) 0.78 (b) 0.078 (c) 0.0078 (d) 7.8
33. 33.3.9 × 2.4 — where does the decimal point go? (a) 93.6 (b) 0.936 (c) 0.0936 (d) 9.36
34. 34.0.51 × 4.7 — where does the decimal point go? (a) 0.02397 (b) 0.2397 (c) 23.97 (d) 2.397
35. 35.0.52 × 0.9 — where does the decimal point go? (a) 0.0468 (b) 0.468 (c) 0.00468 (d) 4.68
36. 36.1.5 × 9 — where does the decimal point go? (a) 0.135 (b) 135 (c) 13.5 (d) 1.35
37. 37.3.6 × 3.8 — where does the decimal point go? (a) 13.68 (b) 136.8 (c) 1.368 (d) 0.1368
38. 38.2.2 × 0.7 — where does the decimal point go? (a) 1.54 (b) 15.4 (c) 0.154 (d) 0.0154
39. 39.8.4 × 0.6 — where does the decimal point go? (a) 50.4 (b) 0.0504 (c) 5.04 (d) 0.504
40. 40.2.1 × 1.7 — where does the decimal point go? (a) 3.57 (b) 0.357 (c) 35.7 (d) 0.0357

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