Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 223 · 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. 1.5.9 × 7 — where does the decimal point go? (a) 0.413 (b) 413 (c) 4.13 (d) 41.3
2. 2.4.8 × 6 — where does the decimal point go? (a) 2.88 (b) 28.8 (c) 288 (d) 0.288
3. 3.0.82 × 0.8 — where does the decimal point go? (a) 0.00656 (b) 0.656 (c) 6.56 (d) 0.0656
4. 4.2.8 × 31 — where does the decimal point go? (a) 8.68 (b) 86.8 (c) 0.868 (d) 868
5. 5.8.1 × 0.6 — where does the decimal point go? (a) 0.486 (b) 0.0486 (c) 48.6 (d) 4.86
6. 6.0.62 × 12 — where does the decimal point go? (a) 7.44 (b) 74.4 (c) 0.0744 (d) 0.744
7. 7.0.38 × 1.3 — where does the decimal point go? (a) 0.00494 (b) 0.0494 (c) 0.494 (d) 4.94
8. 8.3.4 × 4 — where does the decimal point go? (a) 13.6 (b) 0.136 (c) 136 (d) 1.36
9. 9.0.49 × 4.1 — where does the decimal point go? (a) 20.09 (b) 0.2009 (c) 0.02009 (d) 2.009
10. 10.4.1 × 0.3 — where does the decimal point go? (a) 12.3 (b) 0.0123 (c) 1.23 (d) 0.123
11. 11.9.6 × 9 — where does the decimal point go? (a) 86.4 (b) 8.64 (c) 864 (d) 0.864
12. 12.0.22 × 7 — where does the decimal point go? (a) 15.4 (b) 1.54 (c) 0.0154 (d) 0.154
13. 13.0.94 × 2 — where does the decimal point go? (a) 0.0188 (b) 0.188 (c) 18.8 (d) 1.88
14. 14.0.42 × 4.1 — where does the decimal point go? (a) 0.01722 (b) 1.722 (c) 0.1722 (d) 17.22
15. 15.0.95 × 3.7 — where does the decimal point go? (a) 0.03515 (b) 3.515 (c) 0.3515 (d) 35.15
16. 16.0.43 × 0.7 — where does the decimal point go? (a) 0.0301 (b) 0.301 (c) 0.00301 (d) 3.01
17. 17.4.8 × 48 — where does the decimal point go? (a) 23.04 (b) 2304 (c) 230.4 (d) 2.304
18. 18.3.7 × 2 — where does the decimal point go? (a) 0.74 (b) 7.4 (c) 0.074 (d) 74
19. 19.0.17 × 2.8 — where does the decimal point go? (a) 0.00476 (b) 0.0476 (c) 4.76 (d) 0.476
20. 20.0.29 × 7 — where does the decimal point go? (a) 2.03 (b) 0.0203 (c) 0.203 (d) 20.3
21. 21.0.82 × 4 — where does the decimal point go? (a) 32.8 (b) 0.328 (c) 0.0328 (d) 3.28
22. 22.5.6 × 0.6 — where does the decimal point go? (a) 3.36 (b) 0.0336 (c) 33.6 (d) 0.336
23. 23.0.22 × 2 — where does the decimal point go? (a) 0.044 (b) 4.4 (c) 0.0044 (d) 0.44
24. 24.0.71 × 0.6 — where does the decimal point go? (a) 4.26 (b) 0.0426 (c) 0.426 (d) 0.00426
25. 25.0.72 × 3.1 — where does the decimal point go? (a) 0.2232 (b) 2.232 (c) 22.32 (d) 0.02232
26. 26.1.6 × 3 — where does the decimal point go? (a) 0.48 (b) 4.8 (c) 48 (d) 0.048
27. 27.2.8 × 3 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 0.084 (d) 84
28. 28.3.3 × 4.1 — where does the decimal point go? (a) 1.353 (b) 13.53 (c) 135.3 (d) 0.1353
29. 29.6.1 × 7 — where does the decimal point go? (a) 427 (b) 0.427 (c) 42.7 (d) 4.27
30. 30.0.16 × 2 — where does the decimal point go? (a) 3.2 (b) 0.32 (c) 0.032 (d) 0.0032
31. 31.8.7 × 6 — where does the decimal point go? (a) 52.2 (b) 522 (c) 5.22 (d) 0.522
32. 32.5.8 × 4 — where does the decimal point go? (a) 232 (b) 23.2 (c) 0.232 (d) 2.32
33. 33.7.9 × 4.2 — where does the decimal point go? (a) 0.3318 (b) 331.8 (c) 3.318 (d) 33.18
34. 34.7.8 × 22 — where does the decimal point go? (a) 171.6 (b) 1.716 (c) 17.16 (d) 1716
35. 35.3.7 × 0.7 — where does the decimal point go? (a) 0.0259 (b) 25.9 (c) 0.259 (d) 2.59
36. 36.0.54 × 2 — where does the decimal point go? (a) 10.8 (b) 0.108 (c) 1.08 (d) 0.0108
37. 37.9.9 × 7 — where does the decimal point go? (a) 69.3 (b) 0.693 (c) 6.93 (d) 693
38. 38.7.5 × 2.1 — where does the decimal point go? (a) 1.575 (b) 0.1575 (c) 157.5 (d) 15.75
39. 39.0.91 × 0.4 — where does the decimal point go? (a) 0.00364 (b) 0.0364 (c) 3.64 (d) 0.364
40. 40.2.6 × 2 — where does the decimal point go? (a) 5.2 (b) 52 (c) 0.52 (d) 0.052

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