Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 63 · 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. 1.1.7 × 13 — where does the decimal point go? (a) 0.221 (b) 22.1 (c) 2.21 (d) 221
2. 2.0.39 × 3 — where does the decimal point go? (a) 11.7 (b) 0.117 (c) 0.0117 (d) 1.17
3. 3.7.5 × 23 — where does the decimal point go? (a) 1.725 (b) 17.25 (c) 172.5 (d) 1725
4. 4.0.36 × 0.3 — where does the decimal point go? (a) 0.108 (b) 0.00108 (c) 1.08 (d) 0.0108
5. 5.8.6 × 0.9 — where does the decimal point go? (a) 7.74 (b) 0.0774 (c) 77.4 (d) 0.774
6. 6.1.6 × 9 — where does the decimal point go? (a) 144 (b) 1.44 (c) 14.4 (d) 0.144
7. 7.0.91 × 6 — where does the decimal point go? (a) 54.6 (b) 0.0546 (c) 5.46 (d) 0.546
8. 8.7.7 × 1.5 — where does the decimal point go? (a) 115.5 (b) 0.1155 (c) 1.155 (d) 11.55
9. 9.8.4 × 0.2 — where does the decimal point go? (a) 0.168 (b) 16.8 (c) 1.68 (d) 0.0168
10. 10.0.84 × 6 — where does the decimal point go? (a) 50.4 (b) 5.04 (c) 0.504 (d) 0.0504
11. 11.0.51 × 35 — where does the decimal point go? (a) 178.5 (b) 0.1785 (c) 1.785 (d) 17.85
12. 12.4.9 × 47 — where does the decimal point go? (a) 230.3 (b) 23.03 (c) 2.303 (d) 2303
13. 13.3.9 × 5 — where does the decimal point go? (a) 0.195 (b) 195 (c) 1.95 (d) 19.5
14. 14.0.86 × 2.8 — where does the decimal point go? (a) 0.2408 (b) 2.408 (c) 0.02408 (d) 24.08
15. 15.0.97 × 4 — where does the decimal point go? (a) 0.0388 (b) 38.8 (c) 0.388 (d) 3.88
16. 16.0.13 × 3.8 — where does the decimal point go? (a) 0.494 (b) 0.0494 (c) 0.00494 (d) 4.94
17. 17.8.8 × 0.9 — where does the decimal point go? (a) 0.0792 (b) 7.92 (c) 79.2 (d) 0.792
18. 18.0.58 × 4.4 — where does the decimal point go? (a) 0.2552 (b) 25.52 (c) 2.552 (d) 0.02552
19. 19.0.72 × 2.2 — where does the decimal point go? (a) 1.584 (b) 15.84 (c) 0.01584 (d) 0.1584
20. 20.0.61 × 0.5 — where does the decimal point go? (a) 0.0305 (b) 0.00305 (c) 0.305 (d) 3.05
21. 21.2.8 × 0.9 — where does the decimal point go? (a) 0.252 (b) 0.0252 (c) 2.52 (d) 25.2
22. 22.6.9 × 11 — where does the decimal point go? (a) 759 (b) 75.9 (c) 7.59 (d) 0.759
23. 23.7.5 × 17 — where does the decimal point go? (a) 127.5 (b) 1275 (c) 1.275 (d) 12.75
24. 24.2.3 × 8 — where does the decimal point go? (a) 18.4 (b) 0.184 (c) 1.84 (d) 184
25. 25.8.5 × 4.1 — where does the decimal point go? (a) 34.85 (b) 348.5 (c) 0.3485 (d) 3.485
26. 26.0.69 × 32 — where does the decimal point go? (a) 22.08 (b) 0.2208 (c) 2.208 (d) 220.8
27. 27.0.89 × 4.7 — where does the decimal point go? (a) 41.83 (b) 0.4183 (c) 0.04183 (d) 4.183
28. 28.9.2 × 3 — where does the decimal point go? (a) 2.76 (b) 27.6 (c) 0.276 (d) 276
29. 29.0.12 × 2 — where does the decimal point go? (a) 0.024 (b) 0.24 (c) 0.0024 (d) 2.4
30. 30.1.3 × 5 — where does the decimal point go? (a) 6.5 (b) 0.065 (c) 65 (d) 0.65
31. 31.2.7 × 2 — where does the decimal point go? (a) 54 (b) 0.54 (c) 5.4 (d) 0.054
32. 32.0.15 × 3 — where does the decimal point go? (a) 0.0045 (b) 0.45 (c) 0.045 (d) 4.5
33. 33.0.47 × 0.5 — where does the decimal point go? (a) 0.235 (b) 2.35 (c) 0.0235 (d) 0.00235
34. 34.3.7 × 1.7 — where does the decimal point go? (a) 0.629 (b) 6.29 (c) 62.9 (d) 0.0629
35. 35.8.3 × 27 — where does the decimal point go? (a) 224.1 (b) 2241 (c) 22.41 (d) 2.241
36. 36.0.53 × 9 — where does the decimal point go? (a) 0.477 (b) 0.0477 (c) 4.77 (d) 47.7
37. 37.5.1 × 0.5 — where does the decimal point go? (a) 0.255 (b) 2.55 (c) 25.5 (d) 0.0255
38. 38.3.8 × 0.2 — where does the decimal point go? (a) 0.76 (b) 0.0076 (c) 7.6 (d) 0.076
39. 39.0.56 × 0.2 — where does the decimal point go? (a) 0.112 (b) 0.00112 (c) 0.0112 (d) 1.12
40. 40.0.82 × 0.2 — where does the decimal point go? (a) 0.0164 (b) 0.164 (c) 0.00164 (d) 1.64

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