Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 80 · 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. 1.0.22 × 3 — where does the decimal point go? (a) 0.0066 (b) 0.66 (c) 6.6 (d) 0.066
2. 2.0.39 × 8 — where does the decimal point go? (a) 0.312 (b) 3.12 (c) 31.2 (d) 0.0312
3. 3.4.4 × 3.9 — where does the decimal point go? (a) 1.716 (b) 17.16 (c) 0.1716 (d) 171.6
4. 4.0.21 × 6 — where does the decimal point go? (a) 12.6 (b) 0.126 (c) 0.0126 (d) 1.26
5. 5.9.8 × 8 — where does the decimal point go? (a) 784 (b) 78.4 (c) 0.784 (d) 7.84
6. 6.0.22 × 36 — where does the decimal point go? (a) 7.92 (b) 0.0792 (c) 0.792 (d) 79.2
7. 7.8.4 × 6 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 50.4 (d) 504
8. 8.8.6 × 7 — where does the decimal point go? (a) 6.02 (b) 602 (c) 60.2 (d) 0.602
9. 9.2.6 × 2 — where does the decimal point go? (a) 52 (b) 0.052 (c) 0.52 (d) 5.2
10. 10.4.5 × 2.9 — where does the decimal point go? (a) 1.305 (b) 130.5 (c) 13.05 (d) 0.1305
11. 11.0.54 × 2.1 — where does the decimal point go? (a) 1.134 (b) 0.01134 (c) 11.34 (d) 0.1134
12. 12.0.71 × 15 — where does the decimal point go? (a) 106.5 (b) 0.1065 (c) 10.65 (d) 1.065
13. 13.2.1 × 0.9 — where does the decimal point go? (a) 18.9 (b) 0.0189 (c) 1.89 (d) 0.189
14. 14.0.33 × 0.2 — where does the decimal point go? (a) 0.0066 (b) 0.066 (c) 0.66 (d) 0.00066
15. 15.2.1 × 3.1 — where does the decimal point go? (a) 6.51 (b) 65.1 (c) 0.651 (d) 0.0651
16. 16.7.9 × 0.6 — where does the decimal point go? (a) 47.4 (b) 0.0474 (c) 0.474 (d) 4.74
17. 17.9.3 × 2 — where does the decimal point go? (a) 1.86 (b) 186 (c) 0.186 (d) 18.6
18. 18.1.9 × 23 — where does the decimal point go? (a) 43.7 (b) 4.37 (c) 0.437 (d) 437
19. 19.3.5 × 1.1 — where does the decimal point go? (a) 38.5 (b) 0.0385 (c) 3.85 (d) 0.385
20. 20.9.9 × 8 — where does the decimal point go? (a) 79.2 (b) 0.792 (c) 7.92 (d) 792
21. 21.4.1 × 0.4 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 0.0164 (d) 16.4
22. 22.8.9 × 32 — where does the decimal point go? (a) 28.48 (b) 2.848 (c) 2848 (d) 284.8
23. 23.7.8 × 0.2 — where does the decimal point go? (a) 0.156 (b) 15.6 (c) 1.56 (d) 0.0156
24. 24.3.9 × 29 — where does the decimal point go? (a) 1.131 (b) 11.31 (c) 1131 (d) 113.1
25. 25.4.8 × 1.8 — where does the decimal point go? (a) 0.864 (b) 0.0864 (c) 86.4 (d) 8.64
26. 26.2.8 × 0.4 — where does the decimal point go? (a) 1.12 (b) 0.112 (c) 11.2 (d) 0.0112
27. 27.7.8 × 0.6 — where does the decimal point go? (a) 4.68 (b) 0.468 (c) 0.0468 (d) 46.8
28. 28.0.79 × 7 — where does the decimal point go? (a) 5.53 (b) 0.0553 (c) 0.553 (d) 55.3
29. 29.0.88 × 4 — where does the decimal point go? (a) 3.52 (b) 0.0352 (c) 35.2 (d) 0.352
30. 30.3.6 × 0.6 — where does the decimal point go? (a) 2.16 (b) 21.6 (c) 0.216 (d) 0.0216
31. 31.9.4 × 6 — where does the decimal point go? (a) 0.564 (b) 5.64 (c) 56.4 (d) 564
32. 32.0.51 × 2.7 — where does the decimal point go? (a) 0.1377 (b) 13.77 (c) 1.377 (d) 0.01377
33. 33.6.4 × 3 — where does the decimal point go? (a) 19.2 (b) 1.92 (c) 192 (d) 0.192
34. 34.0.86 × 4 — where does the decimal point go? (a) 34.4 (b) 0.344 (c) 3.44 (d) 0.0344
35. 35.1.9 × 2 — where does the decimal point go? (a) 3.8 (b) 0.038 (c) 38 (d) 0.38
36. 36.6.9 × 4.4 — where does the decimal point go? (a) 30.36 (b) 0.3036 (c) 3.036 (d) 303.6
37. 37.0.33 × 3.8 — where does the decimal point go? (a) 0.01254 (b) 0.1254 (c) 1.254 (d) 12.54
38. 38.5.3 × 18 — where does the decimal point go? (a) 95.4 (b) 9.54 (c) 954 (d) 0.954
39. 39.4.9 × 2.7 — where does the decimal point go? (a) 132.3 (b) 0.1323 (c) 1.323 (d) 13.23
40. 40.0.62 × 9 — where does the decimal point go? (a) 5.58 (b) 0.558 (c) 55.8 (d) 0.0558

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