Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 697 · 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. 1.3.6 × 48 — where does the decimal point go? (a) 1728 (b) 172.8 (c) 17.28 (d) 1.728
2. 2.0.52 × 7 — where does the decimal point go? (a) 36.4 (b) 0.364 (c) 3.64 (d) 0.0364
3. 3.5.4 × 0.6 — where does the decimal point go? (a) 32.4 (b) 0.0324 (c) 0.324 (d) 3.24
4. 4.0.83 × 0.5 — where does the decimal point go? (a) 0.415 (b) 0.00415 (c) 0.0415 (d) 4.15
5. 5.8.6 × 0.6 — where does the decimal point go? (a) 0.0516 (b) 0.516 (c) 5.16 (d) 51.6
6. 6.0.86 × 6 — where does the decimal point go? (a) 0.516 (b) 5.16 (c) 0.0516 (d) 51.6
7. 7.6.5 × 17 — where does the decimal point go? (a) 110.5 (b) 1105 (c) 11.05 (d) 1.105
8. 8.0.51 × 0.7 — where does the decimal point go? (a) 0.357 (b) 0.00357 (c) 0.0357 (d) 3.57
9. 9.0.47 × 8 — where does the decimal point go? (a) 0.376 (b) 37.6 (c) 3.76 (d) 0.0376
10. 10.0.56 × 6 — where does the decimal point go? (a) 0.0336 (b) 3.36 (c) 33.6 (d) 0.336
11. 11.0.34 × 16 — where does the decimal point go? (a) 54.4 (b) 0.544 (c) 0.0544 (d) 5.44
12. 12.0.26 × 2 — where does the decimal point go? (a) 0.052 (b) 0.52 (c) 5.2 (d) 0.0052
13. 13.8.1 × 4.3 — where does the decimal point go? (a) 348.3 (b) 34.83 (c) 0.3483 (d) 3.483
14. 14.0.24 × 13 — where does the decimal point go? (a) 31.2 (b) 0.312 (c) 0.0312 (d) 3.12
15. 15.0.22 × 3 — where does the decimal point go? (a) 0.0066 (b) 0.066 (c) 6.6 (d) 0.66
16. 16.5.6 × 21 — where does the decimal point go? (a) 117.6 (b) 11.76 (c) 1176 (d) 1.176
17. 17.0.18 × 6 — where does the decimal point go? (a) 0.0108 (b) 1.08 (c) 0.108 (d) 10.8
18. 18.3.1 × 0.6 — where does the decimal point go? (a) 0.0186 (b) 1.86 (c) 0.186 (d) 18.6
19. 19.0.55 × 3 — where does the decimal point go? (a) 0.165 (b) 0.0165 (c) 16.5 (d) 1.65
20. 20.3.8 × 2.3 — where does the decimal point go? (a) 8.74 (b) 87.4 (c) 0.874 (d) 0.0874
21. 21.1.7 × 1.2 — where does the decimal point go? (a) 0.0204 (b) 0.204 (c) 20.4 (d) 2.04
22. 22.2.6 × 0.2 — where does the decimal point go? (a) 0.0052 (b) 5.2 (c) 0.52 (d) 0.052
23. 23.4.2 × 0.4 — where does the decimal point go? (a) 1.68 (b) 16.8 (c) 0.168 (d) 0.0168
24. 24.0.74 × 4.9 — where does the decimal point go? (a) 36.26 (b) 0.03626 (c) 0.3626 (d) 3.626
25. 25.1.6 × 2 — where does the decimal point go? (a) 0.032 (b) 32 (c) 0.32 (d) 3.2
26. 26.0.56 × 1.1 — where does the decimal point go? (a) 0.0616 (b) 0.00616 (c) 0.616 (d) 6.16
27. 27.0.37 × 5 — where does the decimal point go? (a) 0.185 (b) 0.0185 (c) 18.5 (d) 1.85
28. 28.8.9 × 7 — where does the decimal point go? (a) 62.3 (b) 0.623 (c) 623 (d) 6.23
29. 29.0.76 × 7 — where does the decimal point go? (a) 5.32 (b) 0.0532 (c) 53.2 (d) 0.532
30. 30.0.17 × 11 — where does the decimal point go? (a) 0.0187 (b) 18.7 (c) 1.87 (d) 0.187
31. 31.1.4 × 8 — where does the decimal point go? (a) 11.2 (b) 1.12 (c) 0.112 (d) 112
32. 32.0.73 × 2.7 — where does the decimal point go? (a) 0.1971 (b) 19.71 (c) 1.971 (d) 0.01971
33. 33.7.3 × 1.7 — where does the decimal point go? (a) 12.41 (b) 1.241 (c) 124.1 (d) 0.1241
34. 34.8.1 × 0.9 — where does the decimal point go? (a) 0.0729 (b) 0.729 (c) 72.9 (d) 7.29
35. 35.6.7 × 3 — where does the decimal point go? (a) 0.201 (b) 2.01 (c) 201 (d) 20.1
36. 36.0.12 × 27 — where does the decimal point go? (a) 32.4 (b) 3.24 (c) 0.324 (d) 0.0324
37. 37.8.9 × 4.6 — where does the decimal point go? (a) 0.4094 (b) 4.094 (c) 40.94 (d) 409.4
38. 38.9.8 × 1.7 — where does the decimal point go? (a) 1.666 (b) 16.66 (c) 0.1666 (d) 166.6
39. 39.0.28 × 14 — where does the decimal point go? (a) 3.92 (b) 0.392 (c) 39.2 (d) 0.0392
40. 40.5.8 × 2 — where does the decimal point go? (a) 11.6 (b) 116 (c) 1.16 (d) 0.116

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