Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 44 · 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. 1.0.14 × 2 — where does the decimal point go? (a) 2.8 (b) 0.028 (c) 0.0028 (d) 0.28
2. 2.3.4 × 13 — where does the decimal point go? (a) 0.442 (b) 442 (c) 44.2 (d) 4.42
3. 3.0.16 × 0.8 — where does the decimal point go? (a) 0.0128 (b) 0.00128 (c) 0.128 (d) 1.28
4. 4.0.15 × 0.3 — where does the decimal point go? (a) 0.0045 (b) 0.045 (c) 0.45 (d) 0.00045
5. 5.0.58 × 1.8 — where does the decimal point go? (a) 0.01044 (b) 10.44 (c) 0.1044 (d) 1.044
6. 6.9.1 × 48 — where does the decimal point go? (a) 4368 (b) 4.368 (c) 436.8 (d) 43.68
7. 7.8.2 × 1.7 — where does the decimal point go? (a) 13.94 (b) 0.1394 (c) 1.394 (d) 139.4
8. 8.7.3 × 36 — where does the decimal point go? (a) 262.8 (b) 2628 (c) 26.28 (d) 2.628
9. 9.6.5 × 9 — where does the decimal point go? (a) 58.5 (b) 5.85 (c) 585 (d) 0.585
10. 10.4.8 × 4.2 — where does the decimal point go? (a) 2.016 (b) 20.16 (c) 0.2016 (d) 201.6
11. 11.0.47 × 9 — where does the decimal point go? (a) 0.0423 (b) 0.423 (c) 4.23 (d) 42.3
12. 12.6.5 × 5 — where does the decimal point go? (a) 32.5 (b) 0.325 (c) 325 (d) 3.25
13. 13.0.99 × 0.5 — where does the decimal point go? (a) 4.95 (b) 0.0495 (c) 0.00495 (d) 0.495
14. 14.2.6 × 0.7 — where does the decimal point go? (a) 0.182 (b) 0.0182 (c) 1.82 (d) 18.2
15. 15.8.1 × 3.1 — where does the decimal point go? (a) 25.11 (b) 0.2511 (c) 2.511 (d) 251.1
16. 16.1.2 × 4 — where does the decimal point go? (a) 0.48 (b) 4.8 (c) 0.048 (d) 48
17. 17.3.3 × 0.7 — where does the decimal point go? (a) 0.0231 (b) 0.231 (c) 2.31 (d) 23.1
18. 18.0.82 × 3 — where does the decimal point go? (a) 0.246 (b) 0.0246 (c) 2.46 (d) 24.6
19. 19.0.52 × 6 — where does the decimal point go? (a) 3.12 (b) 0.0312 (c) 31.2 (d) 0.312
20. 20.3.1 × 2.8 — where does the decimal point go? (a) 0.0868 (b) 0.868 (c) 86.8 (d) 8.68
21. 21.0.41 × 5 — where does the decimal point go? (a) 0.205 (b) 20.5 (c) 0.0205 (d) 2.05
22. 22.0.23 × 34 — where does the decimal point go? (a) 0.0782 (b) 7.82 (c) 0.782 (d) 78.2
23. 23.0.78 × 0.9 — where does the decimal point go? (a) 0.00702 (b) 0.0702 (c) 7.02 (d) 0.702
24. 24.9.9 × 4 — where does the decimal point go? (a) 39.6 (b) 3.96 (c) 396 (d) 0.396
25. 25.2.1 × 6 — where does the decimal point go? (a) 1.26 (b) 126 (c) 0.126 (d) 12.6
26. 26.0.13 × 5 — where does the decimal point go? (a) 0.65 (b) 0.0065 (c) 0.065 (d) 6.5
27. 27.8.6 × 19 — where does the decimal point go? (a) 16.34 (b) 1.634 (c) 163.4 (d) 1634
28. 28.7.7 × 0.8 — where does the decimal point go? (a) 0.0616 (b) 0.616 (c) 61.6 (d) 6.16
29. 29.0.15 × 27 — where does the decimal point go? (a) 40.5 (b) 4.05 (c) 0.405 (d) 0.0405
30. 30.9.1 × 5 — where does the decimal point go? (a) 4.55 (b) 455 (c) 45.5 (d) 0.455
31. 31.0.65 × 0.3 — where does the decimal point go? (a) 0.00195 (b) 0.195 (c) 1.95 (d) 0.0195
32. 32.0.14 × 42 — where does the decimal point go? (a) 5.88 (b) 0.0588 (c) 0.588 (d) 58.8
33. 33.3.6 × 22 — where does the decimal point go? (a) 79.2 (b) 7.92 (c) 0.792 (d) 792
34. 34.3.7 × 9 — where does the decimal point go? (a) 33.3 (b) 0.333 (c) 333 (d) 3.33
35. 35.0.52 × 0.8 — where does the decimal point go? (a) 0.0416 (b) 0.00416 (c) 0.416 (d) 4.16
36. 36.3.6 × 9 — where does the decimal point go? (a) 32.4 (b) 3.24 (c) 0.324 (d) 324
37. 37.2.9 × 9 — where does the decimal point go? (a) 26.1 (b) 2.61 (c) 0.261 (d) 261
38. 38.0.12 × 39 — where does the decimal point go? (a) 4.68 (b) 0.0468 (c) 46.8 (d) 0.468
39. 39.6.8 × 0.2 — where does the decimal point go? (a) 0.0136 (b) 13.6 (c) 0.136 (d) 1.36
40. 40.3.2 × 0.2 — where does the decimal point go? (a) 0.64 (b) 0.064 (c) 0.0064 (d) 6.4

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