Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 218 · 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. 1.9.8 × 4.1 — where does the decimal point go? (a) 401.8 (b) 40.18 (c) 0.4018 (d) 4.018
2. 2.0.94 × 0.3 — where does the decimal point go? (a) 2.82 (b) 0.282 (c) 0.0282 (d) 0.00282
3. 3.7.8 × 1.8 — where does the decimal point go? (a) 0.1404 (b) 14.04 (c) 140.4 (d) 1.404
4. 4.9.3 × 0.4 — where does the decimal point go? (a) 0.0372 (b) 3.72 (c) 0.372 (d) 37.2
5. 5.9.2 × 9 — where does the decimal point go? (a) 82.8 (b) 0.828 (c) 828 (d) 8.28
6. 6.0.87 × 0.4 — where does the decimal point go? (a) 0.348 (b) 0.0348 (c) 3.48 (d) 0.00348
7. 7.0.84 × 3.6 — where does the decimal point go? (a) 0.3024 (b) 30.24 (c) 0.03024 (d) 3.024
8. 8.2.5 × 47 — where does the decimal point go? (a) 11.75 (b) 117.5 (c) 1175 (d) 1.175
9. 9.0.33 × 0.7 — where does the decimal point go? (a) 0.231 (b) 0.0231 (c) 2.31 (d) 0.00231
10. 10.7.9 × 39 — where does the decimal point go? (a) 3081 (b) 3.081 (c) 308.1 (d) 30.81
11. 11.0.66 × 0.9 — where does the decimal point go? (a) 0.00594 (b) 0.0594 (c) 5.94 (d) 0.594
12. 12.3.2 × 38 — where does the decimal point go? (a) 12.16 (b) 1.216 (c) 121.6 (d) 1216
13. 13.4.1 × 0.5 — where does the decimal point go? (a) 20.5 (b) 0.205 (c) 0.0205 (d) 2.05
14. 14.6.4 × 4 — where does the decimal point go? (a) 0.256 (b) 25.6 (c) 2.56 (d) 256
15. 15.2.2 × 0.3 — where does the decimal point go? (a) 6.6 (b) 0.0066 (c) 0.66 (d) 0.066
16. 16.2.9 × 34 — where does the decimal point go? (a) 9.86 (b) 0.986 (c) 986 (d) 98.6
17. 17.1.3 × 6 — where does the decimal point go? (a) 0.078 (b) 7.8 (c) 0.78 (d) 78
18. 18.0.17 × 18 — where does the decimal point go? (a) 0.306 (b) 0.0306 (c) 3.06 (d) 30.6
19. 19.0.68 × 0.2 — where does the decimal point go? (a) 0.00136 (b) 0.0136 (c) 0.136 (d) 1.36
20. 20.1.5 × 5 — where does the decimal point go? (a) 0.75 (b) 7.5 (c) 75 (d) 0.075
21. 21.6.1 × 1.2 — where does the decimal point go? (a) 0.732 (b) 73.2 (c) 0.0732 (d) 7.32
22. 22.6.6 × 4.1 — where does the decimal point go? (a) 0.2706 (b) 270.6 (c) 27.06 (d) 2.706
23. 23.2.1 × 2 — where does the decimal point go? (a) 0.42 (b) 42 (c) 0.042 (d) 4.2
24. 24.9.4 × 9 — where does the decimal point go? (a) 0.846 (b) 84.6 (c) 8.46 (d) 846
25. 25.1.8 × 0.2 — where does the decimal point go? (a) 0.0036 (b) 0.036 (c) 3.6 (d) 0.36
26. 26.5.9 × 4 — where does the decimal point go? (a) 2.36 (b) 0.236 (c) 236 (d) 23.6
27. 27.0.31 × 0.2 — where does the decimal point go? (a) 0.62 (b) 0.00062 (c) 0.062 (d) 0.0062
28. 28.7.8 × 2.6 — where does the decimal point go? (a) 0.2028 (b) 2.028 (c) 202.8 (d) 20.28
29. 29.4.7 × 0.4 — where does the decimal point go? (a) 18.8 (b) 0.0188 (c) 0.188 (d) 1.88
30. 30.5.2 × 7 — where does the decimal point go? (a) 0.364 (b) 364 (c) 36.4 (d) 3.64
31. 31.6.2 × 6 — where does the decimal point go? (a) 0.372 (b) 372 (c) 3.72 (d) 37.2
32. 32.0.95 × 7 — where does the decimal point go? (a) 0.665 (b) 0.0665 (c) 66.5 (d) 6.65
33. 33.8.6 × 0.8 — where does the decimal point go? (a) 6.88 (b) 68.8 (c) 0.688 (d) 0.0688
34. 34.3.1 × 2 — where does the decimal point go? (a) 0.62 (b) 6.2 (c) 62 (d) 0.062
35. 35.5.6 × 2.1 — where does the decimal point go? (a) 11.76 (b) 1.176 (c) 0.1176 (d) 117.6
36. 36.3.3 × 1.6 — where does the decimal point go? (a) 0.0528 (b) 5.28 (c) 52.8 (d) 0.528
37. 37.2.3 × 2 — where does the decimal point go? (a) 4.6 (b) 0.046 (c) 0.46 (d) 46
38. 38.0.36 × 3.1 — where does the decimal point go? (a) 1.116 (b) 0.1116 (c) 11.16 (d) 0.01116
39. 39.0.99 × 8 — where does the decimal point go? (a) 0.792 (b) 7.92 (c) 79.2 (d) 0.0792
40. 40.0.36 × 0.7 — where does the decimal point go? (a) 0.252 (b) 0.00252 (c) 2.52 (d) 0.0252

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