Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 30 · 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. 1.7.4 × 7 — where does the decimal point go? (a) 51.8 (b) 5.18 (c) 0.518 (d) 518
2. 2.7.5 × 9 — where does the decimal point go? (a) 6.75 (b) 67.5 (c) 675 (d) 0.675
3. 3.0.31 × 2.5 — where does the decimal point go? (a) 7.75 (b) 0.0775 (c) 0.775 (d) 0.00775
4. 4.0.43 × 3 — where does the decimal point go? (a) 1.29 (b) 0.129 (c) 12.9 (d) 0.0129
5. 5.0.96 × 8 — where does the decimal point go? (a) 76.8 (b) 7.68 (c) 0.0768 (d) 0.768
6. 6.0.44 × 1.2 — where does the decimal point go? (a) 0.0528 (b) 0.528 (c) 5.28 (d) 0.00528
7. 7.4.6 × 18 — where does the decimal point go? (a) 82.8 (b) 8.28 (c) 0.828 (d) 828
8. 8.5.9 × 0.8 — where does the decimal point go? (a) 0.472 (b) 47.2 (c) 4.72 (d) 0.0472
9. 9.0.62 × 7 — where does the decimal point go? (a) 43.4 (b) 0.434 (c) 4.34 (d) 0.0434
10. 10.2.4 × 49 — where does the decimal point go? (a) 117.6 (b) 11.76 (c) 1.176 (d) 1176
11. 11.3.8 × 0.8 — where does the decimal point go? (a) 3.04 (b) 0.0304 (c) 30.4 (d) 0.304
12. 12.2.7 × 32 — where does the decimal point go? (a) 0.864 (b) 86.4 (c) 864 (d) 8.64
13. 13.6.2 × 0.4 — where does the decimal point go? (a) 2.48 (b) 0.0248 (c) 0.248 (d) 24.8
14. 14.0.49 × 13 — where does the decimal point go? (a) 0.637 (b) 63.7 (c) 0.0637 (d) 6.37
15. 15.0.67 × 8 — where does the decimal point go? (a) 5.36 (b) 0.536 (c) 0.0536 (d) 53.6
16. 16.8.3 × 3.6 — where does the decimal point go? (a) 29.88 (b) 2.988 (c) 298.8 (d) 0.2988
17. 17.0.87 × 2 — where does the decimal point go? (a) 0.174 (b) 17.4 (c) 0.0174 (d) 1.74
18. 18.3.7 × 15 — where does the decimal point go? (a) 555 (b) 0.555 (c) 5.55 (d) 55.5
19. 19.6.6 × 1.3 — where does the decimal point go? (a) 0.858 (b) 0.0858 (c) 8.58 (d) 85.8
20. 20.2.3 × 5 — where does the decimal point go? (a) 11.5 (b) 1.15 (c) 0.115 (d) 115
21. 21.0.19 × 1.7 — where does the decimal point go? (a) 0.0323 (b) 0.00323 (c) 0.323 (d) 3.23
22. 22.7.6 × 37 — where does the decimal point go? (a) 2.812 (b) 2812 (c) 281.2 (d) 28.12
23. 23.0.98 × 0.7 — where does the decimal point go? (a) 0.0686 (b) 0.686 (c) 6.86 (d) 0.00686
24. 24.0.54 × 6 — where does the decimal point go? (a) 3.24 (b) 32.4 (c) 0.0324 (d) 0.324
25. 25.0.98 × 1.9 — where does the decimal point go? (a) 18.62 (b) 0.01862 (c) 0.1862 (d) 1.862
26. 26.0.55 × 3.3 — where does the decimal point go? (a) 1.815 (b) 0.1815 (c) 0.01815 (d) 18.15
27. 27.8.4 × 6 — where does the decimal point go? (a) 0.504 (b) 504 (c) 5.04 (d) 50.4
28. 28.0.33 × 0.3 — where does the decimal point go? (a) 0.00099 (b) 0.99 (c) 0.0099 (d) 0.099
29. 29.5.7 × 44 — where does the decimal point go? (a) 25.08 (b) 2508 (c) 250.8 (d) 2.508
30. 30.7.4 × 36 — where does the decimal point go? (a) 266.4 (b) 2.664 (c) 2664 (d) 26.64
31. 31.1.9 × 0.3 — where does the decimal point go? (a) 0.0057 (b) 5.7 (c) 0.057 (d) 0.57
32. 32.0.33 × 5 — where does the decimal point go? (a) 0.165 (b) 16.5 (c) 0.0165 (d) 1.65
33. 33.5.8 × 3 — where does the decimal point go? (a) 174 (b) 1.74 (c) 0.174 (d) 17.4
34. 34.6.8 × 4.6 — where does the decimal point go? (a) 31.28 (b) 3.128 (c) 0.3128 (d) 312.8
35. 35.0.96 × 46 — where does the decimal point go? (a) 4.416 (b) 44.16 (c) 441.6 (d) 0.4416
36. 36.0.48 × 4.1 — where does the decimal point go? (a) 0.1968 (b) 19.68 (c) 1.968 (d) 0.01968
37. 37.3.9 × 4 — where does the decimal point go? (a) 1.56 (b) 156 (c) 0.156 (d) 15.6
38. 38.0.91 × 5 — where does the decimal point go? (a) 0.455 (b) 0.0455 (c) 4.55 (d) 45.5
39. 39.0.63 × 5 — where does the decimal point go? (a) 0.315 (b) 0.0315 (c) 3.15 (d) 31.5
40. 40.4.6 × 6 — where does the decimal point go? (a) 2.76 (b) 0.276 (c) 27.6 (d) 276

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