Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 949 · 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. 1.5.8 × 23 — where does the decimal point go? (a) 133.4 (b) 1334 (c) 13.34 (d) 1.334
2. 2.0.86 × 9 — where does the decimal point go? (a) 0.774 (b) 0.0774 (c) 7.74 (d) 77.4
3. 3.7.5 × 33 — where does the decimal point go? (a) 2475 (b) 24.75 (c) 247.5 (d) 2.475
4. 4.3.4 × 9 — where does the decimal point go? (a) 0.306 (b) 30.6 (c) 306 (d) 3.06
5. 5.0.69 × 0.4 — where does the decimal point go? (a) 0.0276 (b) 0.276 (c) 0.00276 (d) 2.76
6. 6.0.31 × 12 — where does the decimal point go? (a) 37.2 (b) 0.372 (c) 0.0372 (d) 3.72
7. 7.0.25 × 7 — where does the decimal point go? (a) 0.175 (b) 0.0175 (c) 1.75 (d) 17.5
8. 8.0.17 × 0.5 — where does the decimal point go? (a) 0.0085 (b) 0.085 (c) 0.00085 (d) 0.85
9. 9.0.69 × 6 — where does the decimal point go? (a) 41.4 (b) 4.14 (c) 0.414 (d) 0.0414
10. 10.4.2 × 1.8 — where does the decimal point go? (a) 7.56 (b) 0.0756 (c) 75.6 (d) 0.756
11. 11.0.18 × 2 — where does the decimal point go? (a) 0.36 (b) 0.036 (c) 0.0036 (d) 3.6
12. 12.0.19 × 0.4 — where does the decimal point go? (a) 0.76 (b) 0.00076 (c) 0.076 (d) 0.0076
13. 13.0.34 × 0.3 — where does the decimal point go? (a) 0.102 (b) 0.00102 (c) 1.02 (d) 0.0102
14. 14.3.2 × 0.4 — where does the decimal point go? (a) 0.128 (b) 1.28 (c) 0.0128 (d) 12.8
15. 15.4.1 × 8 — where does the decimal point go? (a) 0.328 (b) 3.28 (c) 32.8 (d) 328
16. 16.6.2 × 0.4 — where does the decimal point go? (a) 24.8 (b) 0.0248 (c) 2.48 (d) 0.248
17. 17.4.7 × 0.9 — where does the decimal point go? (a) 42.3 (b) 0.423 (c) 0.0423 (d) 4.23
18. 18.5.3 × 41 — where does the decimal point go? (a) 217.3 (b) 21.73 (c) 2.173 (d) 2173
19. 19.4.6 × 4 — where does the decimal point go? (a) 184 (b) 18.4 (c) 1.84 (d) 0.184
20. 20.1.9 × 1.9 — where does the decimal point go? (a) 0.361 (b) 3.61 (c) 36.1 (d) 0.0361
21. 21.0.23 × 12 — where does the decimal point go? (a) 0.0276 (b) 0.276 (c) 27.6 (d) 2.76
22. 22.3.7 × 2 — where does the decimal point go? (a) 7.4 (b) 0.74 (c) 74 (d) 0.074
23. 23.0.91 × 0.9 — where does the decimal point go? (a) 0.819 (b) 0.0819 (c) 0.00819 (d) 8.19
24. 24.7.3 × 16 — where does the decimal point go? (a) 1168 (b) 1.168 (c) 116.8 (d) 11.68
25. 25.0.18 × 4 — where does the decimal point go? (a) 0.0072 (b) 0.072 (c) 7.2 (d) 0.72
26. 26.5.1 × 1.2 — where does the decimal point go? (a) 61.2 (b) 0.0612 (c) 6.12 (d) 0.612
27. 27.8.6 × 9 — where does the decimal point go? (a) 0.774 (b) 774 (c) 77.4 (d) 7.74
28. 28.0.61 × 0.3 — where does the decimal point go? (a) 0.0183 (b) 0.183 (c) 1.83 (d) 0.00183
29. 29.2.2 × 0.8 — where does the decimal point go? (a) 17.6 (b) 1.76 (c) 0.0176 (d) 0.176
30. 30.9.7 × 0.8 — where does the decimal point go? (a) 0.0776 (b) 7.76 (c) 0.776 (d) 77.6
31. 31.3.4 × 33 — where does the decimal point go? (a) 1.122 (b) 11.22 (c) 1122 (d) 112.2
32. 32.9.1 × 0.8 — where does the decimal point go? (a) 0.728 (b) 72.8 (c) 0.0728 (d) 7.28
33. 33.0.59 × 1.9 — where does the decimal point go? (a) 11.21 (b) 0.01121 (c) 0.1121 (d) 1.121
34. 34.8.7 × 34 — where does the decimal point go? (a) 295.8 (b) 2.958 (c) 2958 (d) 29.58
35. 35.0.83 × 4.9 — where does the decimal point go? (a) 0.4067 (b) 4.067 (c) 0.04067 (d) 40.67
36. 36.0.69 × 5 — where does the decimal point go? (a) 34.5 (b) 0.345 (c) 0.0345 (d) 3.45
37. 37.0.59 × 26 — where does the decimal point go? (a) 15.34 (b) 0.1534 (c) 153.4 (d) 1.534
38. 38.0.49 × 6 — where does the decimal point go? (a) 0.0294 (b) 29.4 (c) 2.94 (d) 0.294
39. 39.4.8 × 4.9 — where does the decimal point go? (a) 0.2352 (b) 23.52 (c) 2.352 (d) 235.2
40. 40.8.2 × 1.2 — where does the decimal point go? (a) 98.4 (b) 0.984 (c) 9.84 (d) 0.0984

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