Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 253 · 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. 1.0.75 × 0.7 — where does the decimal point go? (a) 0.525 (b) 0.00525 (c) 0.0525 (d) 5.25
2. 2.0.28 × 14 — where does the decimal point go? (a) 0.392 (b) 0.0392 (c) 3.92 (d) 39.2
3. 3.4.9 × 37 — where does the decimal point go? (a) 1.813 (b) 1813 (c) 18.13 (d) 181.3
4. 4.0.46 × 0.8 — where does the decimal point go? (a) 3.68 (b) 0.00368 (c) 0.0368 (d) 0.368
5. 5.4.2 × 34 — where does the decimal point go? (a) 14.28 (b) 142.8 (c) 1428 (d) 1.428
6. 6.5.8 × 6 — where does the decimal point go? (a) 34.8 (b) 0.348 (c) 3.48 (d) 348
7. 7.1.9 × 0.9 — where does the decimal point go? (a) 0.171 (b) 1.71 (c) 0.0171 (d) 17.1
8. 8.3.8 × 8 — where does the decimal point go? (a) 304 (b) 3.04 (c) 30.4 (d) 0.304
9. 9.0.87 × 2 — where does the decimal point go? (a) 0.0174 (b) 1.74 (c) 17.4 (d) 0.174
10. 10.0.67 × 46 — where does the decimal point go? (a) 30.82 (b) 308.2 (c) 0.3082 (d) 3.082
11. 11.0.53 × 3.3 — where does the decimal point go? (a) 17.49 (b) 0.1749 (c) 1.749 (d) 0.01749
12. 12.1.7 × 1.4 — where does the decimal point go? (a) 2.38 (b) 0.238 (c) 23.8 (d) 0.0238
13. 13.0.77 × 3 — where does the decimal point go? (a) 23.1 (b) 0.0231 (c) 2.31 (d) 0.231
14. 14.0.99 × 21 — where does the decimal point go? (a) 2.079 (b) 0.2079 (c) 20.79 (d) 207.9
15. 15.0.84 × 43 — where does the decimal point go? (a) 36.12 (b) 3.612 (c) 361.2 (d) 0.3612
16. 16.0.23 × 35 — where does the decimal point go? (a) 80.5 (b) 8.05 (c) 0.0805 (d) 0.805
17. 17.0.69 × 9 — where does the decimal point go? (a) 0.621 (b) 6.21 (c) 0.0621 (d) 62.1
18. 18.1.4 × 27 — where does the decimal point go? (a) 3.78 (b) 37.8 (c) 378 (d) 0.378
19. 19.3.2 × 2 — where does the decimal point go? (a) 6.4 (b) 64 (c) 0.064 (d) 0.64
20. 20.6.8 × 13 — where does the decimal point go? (a) 8.84 (b) 0.884 (c) 884 (d) 88.4
21. 21.5.1 × 5 — where does the decimal point go? (a) 255 (b) 25.5 (c) 0.255 (d) 2.55
22. 22.0.71 × 26 — where does the decimal point go? (a) 184.6 (b) 0.1846 (c) 18.46 (d) 1.846
23. 23.0.48 × 6 — where does the decimal point go? (a) 0.0288 (b) 2.88 (c) 0.288 (d) 28.8
24. 24.2.8 × 0.8 — where does the decimal point go? (a) 0.0224 (b) 0.224 (c) 2.24 (d) 22.4
25. 25.5.6 × 0.4 — where does the decimal point go? (a) 22.4 (b) 0.224 (c) 2.24 (d) 0.0224
26. 26.0.76 × 4 — where does the decimal point go? (a) 3.04 (b) 0.0304 (c) 30.4 (d) 0.304
27. 27.1.8 × 0.2 — where does the decimal point go? (a) 0.0036 (b) 0.36 (c) 3.6 (d) 0.036
28. 28.0.57 × 5 — where does the decimal point go? (a) 28.5 (b) 0.0285 (c) 2.85 (d) 0.285
29. 29.9.5 × 1.5 — where does the decimal point go? (a) 0.1425 (b) 1.425 (c) 142.5 (d) 14.25
30. 30.0.55 × 7 — where does the decimal point go? (a) 0.385 (b) 0.0385 (c) 38.5 (d) 3.85
31. 31.0.69 × 0.9 — where does the decimal point go? (a) 0.00621 (b) 0.621 (c) 0.0621 (d) 6.21
32. 32.0.22 × 4.2 — where does the decimal point go? (a) 9.24 (b) 0.00924 (c) 0.924 (d) 0.0924
33. 33.7.1 × 0.3 — where does the decimal point go? (a) 0.0213 (b) 0.213 (c) 21.3 (d) 2.13
34. 34.9.7 × 3 — where does the decimal point go? (a) 29.1 (b) 291 (c) 0.291 (d) 2.91
35. 35.0.47 × 0.7 — where does the decimal point go? (a) 3.29 (b) 0.0329 (c) 0.00329 (d) 0.329
36. 36.7.3 × 3.8 — where does the decimal point go? (a) 277.4 (b) 2.774 (c) 0.2774 (d) 27.74
37. 37.0.51 × 8 — where does the decimal point go? (a) 0.408 (b) 4.08 (c) 40.8 (d) 0.0408
38. 38.0.64 × 0.9 — where does the decimal point go? (a) 5.76 (b) 0.0576 (c) 0.00576 (d) 0.576
39. 39.0.36 × 32 — where does the decimal point go? (a) 0.1152 (b) 115.2 (c) 1.152 (d) 11.52
40. 40.0.67 × 2.4 — where does the decimal point go? (a) 0.01608 (b) 1.608 (c) 0.1608 (d) 16.08

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