Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 637 · 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. 1.0.47 × 21 — where does the decimal point go? (a) 98.7 (b) 9.87 (c) 0.0987 (d) 0.987
2. 2.0.98 × 3.1 — where does the decimal point go? (a) 3.038 (b) 0.3038 (c) 0.03038 (d) 30.38
3. 3.0.33 × 16 — where does the decimal point go? (a) 52.8 (b) 5.28 (c) 0.0528 (d) 0.528
4. 4.3.2 × 18 — where does the decimal point go? (a) 576 (b) 5.76 (c) 0.576 (d) 57.6
5. 5.7.8 × 4.7 — where does the decimal point go? (a) 0.3666 (b) 366.6 (c) 36.66 (d) 3.666
6. 6.9.4 × 7 — where does the decimal point go? (a) 6.58 (b) 0.658 (c) 658 (d) 65.8
7. 7.0.82 × 1.7 — where does the decimal point go? (a) 13.94 (b) 0.01394 (c) 0.1394 (d) 1.394
8. 8.0.33 × 41 — where does the decimal point go? (a) 1.353 (b) 135.3 (c) 0.1353 (d) 13.53
9. 9.7.9 × 5 — where does the decimal point go? (a) 3.95 (b) 395 (c) 0.395 (d) 39.5
10. 10.6.2 × 0.7 — where does the decimal point go? (a) 0.0434 (b) 0.434 (c) 43.4 (d) 4.34
11. 11.2.8 × 6 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.168 (d) 168
12. 12.9.4 × 23 — where does the decimal point go? (a) 21.62 (b) 216.2 (c) 2.162 (d) 2162
13. 13.5.8 × 12 — where does the decimal point go? (a) 69.6 (b) 6.96 (c) 0.696 (d) 696
14. 14.0.38 × 14 — where does the decimal point go? (a) 53.2 (b) 0.532 (c) 5.32 (d) 0.0532
15. 15.1.6 × 4.4 — where does the decimal point go? (a) 70.4 (b) 0.0704 (c) 7.04 (d) 0.704
16. 16.6.1 × 0.4 — where does the decimal point go? (a) 24.4 (b) 0.244 (c) 0.0244 (d) 2.44
17. 17.0.88 × 2 — where does the decimal point go? (a) 0.176 (b) 17.6 (c) 1.76 (d) 0.0176
18. 18.8.7 × 4 — where does the decimal point go? (a) 34.8 (b) 0.348 (c) 348 (d) 3.48
19. 19.0.31 × 4 — where does the decimal point go? (a) 1.24 (b) 0.124 (c) 12.4 (d) 0.0124
20. 20.0.25 × 19 — where does the decimal point go? (a) 4.75 (b) 0.0475 (c) 0.475 (d) 47.5
21. 21.3.3 × 0.2 — where does the decimal point go? (a) 0.0066 (b) 0.066 (c) 6.6 (d) 0.66
22. 22.6.6 × 7 — where does the decimal point go? (a) 4.62 (b) 0.462 (c) 46.2 (d) 462
23. 23.0.19 × 39 — where does the decimal point go? (a) 0.0741 (b) 74.1 (c) 0.741 (d) 7.41
24. 24.8.7 × 0.5 — where does the decimal point go? (a) 0.0435 (b) 4.35 (c) 0.435 (d) 43.5
25. 25.0.24 × 43 — where does the decimal point go? (a) 103.2 (b) 10.32 (c) 0.1032 (d) 1.032
26. 26.8.5 × 4.3 — where does the decimal point go? (a) 0.3655 (b) 365.5 (c) 3.655 (d) 36.55
27. 27.1.9 × 25 — where does the decimal point go? (a) 475 (b) 0.475 (c) 4.75 (d) 47.5
28. 28.0.14 × 0.3 — where does the decimal point go? (a) 0.42 (b) 0.00042 (c) 0.0042 (d) 0.042
29. 29.0.21 × 4.5 — where does the decimal point go? (a) 0.945 (b) 0.0945 (c) 0.00945 (d) 9.45
30. 30.0.32 × 46 — where does the decimal point go? (a) 1.472 (b) 14.72 (c) 0.1472 (d) 147.2
31. 31.0.78 × 2.9 — where does the decimal point go? (a) 0.2262 (b) 22.62 (c) 2.262 (d) 0.02262
32. 32.4.6 × 0.3 — where does the decimal point go? (a) 1.38 (b) 0.0138 (c) 0.138 (d) 13.8
33. 33.1.2 × 0.2 — where does the decimal point go? (a) 2.4 (b) 0.24 (c) 0.0024 (d) 0.024
34. 34.1.2 × 0.3 — where does the decimal point go? (a) 0.36 (b) 0.036 (c) 0.0036 (d) 3.6
35. 35.0.13 × 5 — where does the decimal point go? (a) 0.65 (b) 0.0065 (c) 0.065 (d) 6.5
36. 36.2.8 × 23 — where does the decimal point go? (a) 0.644 (b) 64.4 (c) 644 (d) 6.44
37. 37.4.4 × 0.9 — where does the decimal point go? (a) 0.396 (b) 0.0396 (c) 3.96 (d) 39.6
38. 38.4.7 × 25 — where does the decimal point go? (a) 11.75 (b) 1.175 (c) 117.5 (d) 1175
39. 39.9.6 × 0.6 — where does the decimal point go? (a) 0.576 (b) 0.0576 (c) 5.76 (d) 57.6
40. 40.0.48 × 4.1 — where does the decimal point go? (a) 1.968 (b) 19.68 (c) 0.1968 (d) 0.01968

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