Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 388 · 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. 1.7.1 × 0.7 — where does the decimal point go? (a) 0.497 (b) 4.97 (c) 0.0497 (d) 49.7
2. 2.2.4 × 7 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 168 (d) 0.168
3. 3.1.8 × 31 — where does the decimal point go? (a) 0.558 (b) 55.8 (c) 5.58 (d) 558
4. 4.4.5 × 7 — where does the decimal point go? (a) 315 (b) 0.315 (c) 3.15 (d) 31.5
5. 5.0.86 × 4.3 — where does the decimal point go? (a) 0.03698 (b) 0.3698 (c) 36.98 (d) 3.698
6. 6.9.1 × 4.2 — where does the decimal point go? (a) 382.2 (b) 3.822 (c) 0.3822 (d) 38.22
7. 7.5.3 × 4 — where does the decimal point go? (a) 21.2 (b) 0.212 (c) 212 (d) 2.12
8. 8.0.24 × 14 — where does the decimal point go? (a) 0.336 (b) 0.0336 (c) 3.36 (d) 33.6
9. 9.0.71 × 0.7 — where does the decimal point go? (a) 4.97 (b) 0.00497 (c) 0.497 (d) 0.0497
10. 10.2.3 × 21 — where does the decimal point go? (a) 4.83 (b) 48.3 (c) 0.483 (d) 483
11. 11.6.7 × 0.2 — where does the decimal point go? (a) 1.34 (b) 0.134 (c) 13.4 (d) 0.0134
12. 12.6.9 × 39 — where does the decimal point go? (a) 269.1 (b) 26.91 (c) 2.691 (d) 2691
13. 13.2.6 × 39 — where does the decimal point go? (a) 1014 (b) 1.014 (c) 101.4 (d) 10.14
14. 14.4.8 × 1.8 — where does the decimal point go? (a) 0.0864 (b) 0.864 (c) 86.4 (d) 8.64
15. 15.0.72 × 23 — where does the decimal point go? (a) 0.1656 (b) 16.56 (c) 165.6 (d) 1.656
16. 16.6.8 × 33 — where does the decimal point go? (a) 22.44 (b) 2244 (c) 2.244 (d) 224.4
17. 17.0.83 × 16 — where does the decimal point go? (a) 1.328 (b) 0.1328 (c) 132.8 (d) 13.28
18. 18.9.2 × 0.8 — where does the decimal point go? (a) 73.6 (b) 7.36 (c) 0.0736 (d) 0.736
19. 19.0.34 × 48 — where does the decimal point go? (a) 0.1632 (b) 163.2 (c) 16.32 (d) 1.632
20. 20.0.33 × 37 — where does the decimal point go? (a) 1.221 (b) 122.1 (c) 12.21 (d) 0.1221
21. 21.6.2 × 44 — where does the decimal point go? (a) 27.28 (b) 272.8 (c) 2.728 (d) 2728
22. 22.5.8 × 6 — where does the decimal point go? (a) 0.348 (b) 3.48 (c) 348 (d) 34.8
23. 23.0.56 × 3 — where does the decimal point go? (a) 0.0168 (b) 16.8 (c) 1.68 (d) 0.168
24. 24.0.38 × 13 — where does the decimal point go? (a) 4.94 (b) 0.0494 (c) 0.494 (d) 49.4
25. 25.4.6 × 7 — where does the decimal point go? (a) 32.2 (b) 322 (c) 0.322 (d) 3.22
26. 26.0.93 × 22 — where does the decimal point go? (a) 20.46 (b) 2.046 (c) 204.6 (d) 0.2046
27. 27.0.73 × 4 — where does the decimal point go? (a) 0.292 (b) 2.92 (c) 0.0292 (d) 29.2
28. 28.8.5 × 3 — where does the decimal point go? (a) 0.255 (b) 25.5 (c) 255 (d) 2.55
29. 29.0.29 × 13 — where does the decimal point go? (a) 0.0377 (b) 37.7 (c) 0.377 (d) 3.77
30. 30.0.84 × 6 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 50.4 (d) 0.0504
31. 31.1.3 × 0.7 — where does the decimal point go? (a) 0.91 (b) 0.091 (c) 9.1 (d) 0.0091
32. 32.0.46 × 0.6 — where does the decimal point go? (a) 0.00276 (b) 2.76 (c) 0.276 (d) 0.0276
33. 33.8.8 × 8 — where does the decimal point go? (a) 0.704 (b) 704 (c) 7.04 (d) 70.4
34. 34.6.3 × 0.9 — where does the decimal point go? (a) 0.567 (b) 0.0567 (c) 5.67 (d) 56.7
35. 35.0.91 × 4 — where does the decimal point go? (a) 36.4 (b) 0.364 (c) 0.0364 (d) 3.64
36. 36.5.4 × 8 — where does the decimal point go? (a) 432 (b) 43.2 (c) 4.32 (d) 0.432
37. 37.4.1 × 4.6 — where does the decimal point go? (a) 1.886 (b) 18.86 (c) 0.1886 (d) 188.6
38. 38.0.21 × 8 — where does the decimal point go? (a) 1.68 (b) 0.168 (c) 0.0168 (d) 16.8
39. 39.8.2 × 0.8 — where does the decimal point go? (a) 0.656 (b) 65.6 (c) 0.0656 (d) 6.56
40. 40.0.72 × 0.6 — where does the decimal point go? (a) 0.00432 (b) 0.432 (c) 0.0432 (d) 4.32

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