Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 339 · 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. 1.2.4 × 36 — where does the decimal point go? (a) 86.4 (b) 8.64 (c) 0.864 (d) 864
2. 2.1.7 × 0.8 — where does the decimal point go? (a) 1.36 (b) 13.6 (c) 0.0136 (d) 0.136
3. 3.0.41 × 18 — where does the decimal point go? (a) 0.738 (b) 7.38 (c) 0.0738 (d) 73.8
4. 4.0.52 × 34 — where does the decimal point go? (a) 17.68 (b) 1.768 (c) 0.1768 (d) 176.8
5. 5.0.99 × 3 — where does the decimal point go? (a) 2.97 (b) 0.0297 (c) 0.297 (d) 29.7
6. 6.0.68 × 6 — where does the decimal point go? (a) 40.8 (b) 0.408 (c) 4.08 (d) 0.0408
7. 7.4.5 × 37 — where does the decimal point go? (a) 16.65 (b) 166.5 (c) 1665 (d) 1.665
8. 8.9.1 × 23 — where does the decimal point go? (a) 20.93 (b) 209.3 (c) 2.093 (d) 2093
9. 9.8.9 × 2.5 — where does the decimal point go? (a) 222.5 (b) 0.2225 (c) 2.225 (d) 22.25
10. 10.0.18 × 0.4 — where does the decimal point go? (a) 0.072 (b) 0.00072 (c) 0.72 (d) 0.0072
11. 11.3.7 × 4 — where does the decimal point go? (a) 14.8 (b) 148 (c) 1.48 (d) 0.148
12. 12.2.7 × 3 — where does the decimal point go? (a) 8.1 (b) 81 (c) 0.081 (d) 0.81
13. 13.0.45 × 2.5 — where does the decimal point go? (a) 1.125 (b) 0.01125 (c) 0.1125 (d) 11.25
14. 14.0.67 × 3.4 — where does the decimal point go? (a) 0.2278 (b) 0.02278 (c) 22.78 (d) 2.278
15. 15.5.7 × 0.3 — where does the decimal point go? (a) 0.171 (b) 0.0171 (c) 17.1 (d) 1.71
16. 16.7.1 × 7 — where does the decimal point go? (a) 497 (b) 4.97 (c) 49.7 (d) 0.497
17. 17.0.39 × 9 — where does the decimal point go? (a) 0.351 (b) 0.0351 (c) 35.1 (d) 3.51
18. 18.0.57 × 22 — where does the decimal point go? (a) 0.1254 (b) 12.54 (c) 125.4 (d) 1.254
19. 19.2.7 × 0.3 — where does the decimal point go? (a) 0.81 (b) 8.1 (c) 0.081 (d) 0.0081
20. 20.0.58 × 42 — where does the decimal point go? (a) 2.436 (b) 243.6 (c) 24.36 (d) 0.2436
21. 21.4.8 × 7 — where does the decimal point go? (a) 0.336 (b) 336 (c) 33.6 (d) 3.36
22. 22.3.3 × 6 — where does the decimal point go? (a) 1.98 (b) 198 (c) 19.8 (d) 0.198
23. 23.2.8 × 0.7 — where does the decimal point go? (a) 1.96 (b) 0.0196 (c) 19.6 (d) 0.196
24. 24.4.3 × 44 — where does the decimal point go? (a) 1.892 (b) 1892 (c) 18.92 (d) 189.2
25. 25.1.2 × 4 — where does the decimal point go? (a) 0.048 (b) 0.48 (c) 48 (d) 4.8
26. 26.3.7 × 0.5 — where does the decimal point go? (a) 18.5 (b) 0.0185 (c) 0.185 (d) 1.85
27. 27.0.57 × 4 — where does the decimal point go? (a) 2.28 (b) 0.0228 (c) 22.8 (d) 0.228
28. 28.3.1 × 4.9 — where does the decimal point go? (a) 151.9 (b) 1.519 (c) 15.19 (d) 0.1519
29. 29.7.9 × 2 — where does the decimal point go? (a) 1.58 (b) 0.158 (c) 15.8 (d) 158
30. 30.7.5 × 15 — where does the decimal point go? (a) 112.5 (b) 1.125 (c) 1125 (d) 11.25
31. 31.7.8 × 0.6 — where does the decimal point go? (a) 46.8 (b) 0.468 (c) 0.0468 (d) 4.68
32. 32.0.15 × 13 — where does the decimal point go? (a) 1.95 (b) 0.195 (c) 0.0195 (d) 19.5
33. 33.0.51 × 9 — where does the decimal point go? (a) 0.0459 (b) 4.59 (c) 0.459 (d) 45.9
34. 34.0.66 × 2 — where does the decimal point go? (a) 1.32 (b) 0.132 (c) 0.0132 (d) 13.2
35. 35.5.9 × 0.6 — where does the decimal point go? (a) 0.0354 (b) 0.354 (c) 35.4 (d) 3.54
36. 36.0.96 × 4.6 — where does the decimal point go? (a) 0.04416 (b) 44.16 (c) 0.4416 (d) 4.416
37. 37.8.1 × 0.7 — where does the decimal point go? (a) 56.7 (b) 5.67 (c) 0.0567 (d) 0.567
38. 38.7.9 × 1.6 — where does the decimal point go? (a) 12.64 (b) 0.1264 (c) 1.264 (d) 126.4
39. 39.6.7 × 1.2 — where does the decimal point go? (a) 8.04 (b) 80.4 (c) 0.804 (d) 0.0804
40. 40.3.1 × 39 — where does the decimal point go? (a) 12.09 (b) 120.9 (c) 1.209 (d) 1209

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