Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 638 · 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. 1.7.1 × 0.3 — where does the decimal point go? (a) 2.13 (b) 0.213 (c) 21.3 (d) 0.0213
2. 2.7.8 × 0.8 — where does the decimal point go? (a) 6.24 (b) 62.4 (c) 0.624 (d) 0.0624
3. 3.0.38 × 1.6 — where does the decimal point go? (a) 6.08 (b) 0.608 (c) 0.00608 (d) 0.0608
4. 4.3.2 × 7 — where does the decimal point go? (a) 224 (b) 2.24 (c) 0.224 (d) 22.4
5. 5.0.45 × 9 — where does the decimal point go? (a) 4.05 (b) 40.5 (c) 0.405 (d) 0.0405
6. 6.0.91 × 4 — where does the decimal point go? (a) 3.64 (b) 36.4 (c) 0.0364 (d) 0.364
7. 7.3.7 × 1.6 — where does the decimal point go? (a) 5.92 (b) 0.0592 (c) 59.2 (d) 0.592
8. 8.6.5 × 45 — where does the decimal point go? (a) 2.925 (b) 29.25 (c) 2925 (d) 292.5
9. 9.4.6 × 0.4 — where does the decimal point go? (a) 0.0184 (b) 1.84 (c) 0.184 (d) 18.4
10. 10.0.47 × 19 — where does the decimal point go? (a) 89.3 (b) 0.893 (c) 8.93 (d) 0.0893
11. 11.4.3 × 4.6 — where does the decimal point go? (a) 0.1978 (b) 197.8 (c) 19.78 (d) 1.978
12. 12.2.7 × 4.7 — where does the decimal point go? (a) 12.69 (b) 1.269 (c) 0.1269 (d) 126.9
13. 13.0.42 × 0.9 — where does the decimal point go? (a) 3.78 (b) 0.00378 (c) 0.378 (d) 0.0378
14. 14.0.27 × 4.7 — where does the decimal point go? (a) 12.69 (b) 0.1269 (c) 0.01269 (d) 1.269
15. 15.1.7 × 0.5 — where does the decimal point go? (a) 0.085 (b) 0.0085 (c) 0.85 (d) 8.5
16. 16.1.2 × 12 — where does the decimal point go? (a) 14.4 (b) 1.44 (c) 0.144 (d) 144
17. 17.5.3 × 7 — where does the decimal point go? (a) 371 (b) 37.1 (c) 3.71 (d) 0.371
18. 18.7.6 × 4.6 — where does the decimal point go? (a) 3.496 (b) 34.96 (c) 349.6 (d) 0.3496
19. 19.4.4 × 4 — where does the decimal point go? (a) 0.176 (b) 1.76 (c) 176 (d) 17.6
20. 20.0.95 × 45 — where does the decimal point go? (a) 427.5 (b) 4.275 (c) 0.4275 (d) 42.75
21. 21.0.61 × 2 — where does the decimal point go? (a) 0.122 (b) 1.22 (c) 0.0122 (d) 12.2
22. 22.6.8 × 4 — where does the decimal point go? (a) 2.72 (b) 0.272 (c) 27.2 (d) 272
23. 23.7.9 × 9 — where does the decimal point go? (a) 71.1 (b) 711 (c) 0.711 (d) 7.11
24. 24.6.5 × 5 — where does the decimal point go? (a) 32.5 (b) 3.25 (c) 325 (d) 0.325
25. 25.8.1 × 36 — where does the decimal point go? (a) 2916 (b) 29.16 (c) 2.916 (d) 291.6
26. 26.0.78 × 1.7 — where does the decimal point go? (a) 1.326 (b) 0.1326 (c) 13.26 (d) 0.01326
27. 27.6.1 × 5 — where does the decimal point go? (a) 30.5 (b) 0.305 (c) 305 (d) 3.05
28. 28.0.66 × 9 — where does the decimal point go? (a) 5.94 (b) 0.0594 (c) 0.594 (d) 59.4
29. 29.4.4 × 1.2 — where does the decimal point go? (a) 52.8 (b) 5.28 (c) 0.0528 (d) 0.528
30. 30.4.6 × 0.3 — where does the decimal point go? (a) 0.138 (b) 0.0138 (c) 1.38 (d) 13.8
31. 31.9.1 × 0.5 — where does the decimal point go? (a) 0.0455 (b) 4.55 (c) 0.455 (d) 45.5
32. 32.9.5 × 4.5 — where does the decimal point go? (a) 0.4275 (b) 427.5 (c) 42.75 (d) 4.275
33. 33.7.3 × 49 — where does the decimal point go? (a) 35.77 (b) 3.577 (c) 357.7 (d) 3577
34. 34.7.4 × 33 — where does the decimal point go? (a) 24.42 (b) 2.442 (c) 2442 (d) 244.2
35. 35.3.3 × 48 — where does the decimal point go? (a) 1584 (b) 158.4 (c) 15.84 (d) 1.584
36. 36.5.8 × 19 — where does the decimal point go? (a) 1102 (b) 11.02 (c) 1.102 (d) 110.2
37. 37.6.9 × 0.3 — where does the decimal point go? (a) 20.7 (b) 2.07 (c) 0.207 (d) 0.0207
38. 38.7.9 × 48 — where does the decimal point go? (a) 3.792 (b) 379.2 (c) 3792 (d) 37.92
39. 39.0.37 × 0.2 — where does the decimal point go? (a) 0.00074 (b) 0.0074 (c) 0.74 (d) 0.074
40. 40.0.71 × 3.7 — where does the decimal point go? (a) 26.27 (b) 0.02627 (c) 2.627 (d) 0.2627

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