Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 309 · 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. 1.0.82 × 0.7 — where does the decimal point go? (a) 5.74 (b) 0.00574 (c) 0.574 (d) 0.0574
2. 2.0.32 × 7 — where does the decimal point go? (a) 2.24 (b) 0.224 (c) 22.4 (d) 0.0224
3. 3.2.1 × 17 — where does the decimal point go? (a) 357 (b) 0.357 (c) 35.7 (d) 3.57
4. 4.7.1 × 0.7 — where does the decimal point go? (a) 0.0497 (b) 49.7 (c) 0.497 (d) 4.97
5. 5.1.3 × 3.5 — where does the decimal point go? (a) 4.55 (b) 0.0455 (c) 0.455 (d) 45.5
6. 6.0.56 × 1.7 — where does the decimal point go? (a) 9.52 (b) 0.0952 (c) 0.952 (d) 0.00952
7. 7.8.2 × 1.9 — where does the decimal point go? (a) 0.1558 (b) 15.58 (c) 155.8 (d) 1.558
8. 8.0.59 × 2.5 — where does the decimal point go? (a) 0.1475 (b) 0.01475 (c) 1.475 (d) 14.75
9. 9.1.6 × 0.4 — where does the decimal point go? (a) 6.4 (b) 0.0064 (c) 0.064 (d) 0.64
10. 10.0.52 × 41 — where does the decimal point go? (a) 21.32 (b) 2.132 (c) 213.2 (d) 0.2132
11. 11.5.9 × 0.6 — where does the decimal point go? (a) 35.4 (b) 0.354 (c) 3.54 (d) 0.0354
12. 12.9.6 × 0.8 — where does the decimal point go? (a) 7.68 (b) 76.8 (c) 0.768 (d) 0.0768
13. 13.0.83 × 4.2 — where does the decimal point go? (a) 34.86 (b) 3.486 (c) 0.03486 (d) 0.3486
14. 14.0.58 × 46 — where does the decimal point go? (a) 26.68 (b) 2.668 (c) 266.8 (d) 0.2668
15. 15.6.6 × 34 — where does the decimal point go? (a) 22.44 (b) 2.244 (c) 224.4 (d) 2244
16. 16.0.83 × 0.7 — where does the decimal point go? (a) 5.81 (b) 0.0581 (c) 0.00581 (d) 0.581
17. 17.0.48 × 0.4 — where does the decimal point go? (a) 0.00192 (b) 0.192 (c) 0.0192 (d) 1.92
18. 18.5.9 × 2 — where does the decimal point go? (a) 1.18 (b) 11.8 (c) 0.118 (d) 118
19. 19.0.72 × 0.6 — where does the decimal point go? (a) 0.00432 (b) 4.32 (c) 0.0432 (d) 0.432
20. 20.7.9 × 5 — where does the decimal point go? (a) 3.95 (b) 0.395 (c) 39.5 (d) 395
21. 21.0.21 × 0.9 — where does the decimal point go? (a) 0.0189 (b) 0.189 (c) 1.89 (d) 0.00189
22. 22.2.6 × 0.4 — where does the decimal point go? (a) 10.4 (b) 0.104 (c) 1.04 (d) 0.0104
23. 23.6.3 × 0.6 — where does the decimal point go? (a) 3.78 (b) 37.8 (c) 0.378 (d) 0.0378
24. 24.4.4 × 0.6 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 0.0264 (d) 2.64
25. 25.3.4 × 12 — where does the decimal point go? (a) 4.08 (b) 408 (c) 40.8 (d) 0.408
26. 26.0.32 × 0.6 — where does the decimal point go? (a) 0.0192 (b) 0.192 (c) 1.92 (d) 0.00192
27. 27.3.1 × 33 — where does the decimal point go? (a) 1023 (b) 102.3 (c) 1.023 (d) 10.23
28. 28.7.9 × 2.5 — where does the decimal point go? (a) 1.975 (b) 0.1975 (c) 19.75 (d) 197.5
29. 29.4.4 × 0.2 — where does the decimal point go? (a) 8.8 (b) 0.0088 (c) 0.088 (d) 0.88
30. 30.0.89 × 3.9 — where does the decimal point go? (a) 0.3471 (b) 0.03471 (c) 3.471 (d) 34.71
31. 31.1.7 × 19 — where does the decimal point go? (a) 0.323 (b) 3.23 (c) 32.3 (d) 323
32. 32.1.7 × 0.6 — where does the decimal point go? (a) 1.02 (b) 0.0102 (c) 10.2 (d) 0.102
33. 33.2.6 × 8 — where does the decimal point go? (a) 0.208 (b) 20.8 (c) 208 (d) 2.08
34. 34.5.1 × 3 — where does the decimal point go? (a) 0.153 (b) 15.3 (c) 153 (d) 1.53
35. 35.6.7 × 0.2 — where does the decimal point go? (a) 0.0134 (b) 1.34 (c) 0.134 (d) 13.4
36. 36.0.46 × 3.1 — where does the decimal point go? (a) 14.26 (b) 1.426 (c) 0.01426 (d) 0.1426
37. 37.5.2 × 0.6 — where does the decimal point go? (a) 0.312 (b) 0.0312 (c) 3.12 (d) 31.2
38. 38.0.54 × 2 — where does the decimal point go? (a) 0.108 (b) 10.8 (c) 0.0108 (d) 1.08
39. 39.6.6 × 0.9 — where does the decimal point go? (a) 0.0594 (b) 59.4 (c) 0.594 (d) 5.94
40. 40.5.8 × 0.7 — where does the decimal point go? (a) 0.0406 (b) 0.406 (c) 4.06 (d) 40.6

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