Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 144 · 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. 1.6.9 × 2 — where does the decimal point go? (a) 0.138 (b) 138 (c) 1.38 (d) 13.8
2. 2.0.38 × 8 — where does the decimal point go? (a) 0.304 (b) 3.04 (c) 30.4 (d) 0.0304
3. 3.0.21 × 0.5 — where does the decimal point go? (a) 0.0105 (b) 0.105 (c) 1.05 (d) 0.00105
4. 4.0.15 × 0.3 — where does the decimal point go? (a) 0.0045 (b) 0.00045 (c) 0.045 (d) 0.45
5. 5.5.3 × 5 — where does the decimal point go? (a) 2.65 (b) 26.5 (c) 0.265 (d) 265
6. 6.0.19 × 46 — where does the decimal point go? (a) 8.74 (b) 0.0874 (c) 0.874 (d) 87.4
7. 7.1.3 × 28 — where does the decimal point go? (a) 364 (b) 36.4 (c) 0.364 (d) 3.64
8. 8.0.93 × 6 — where does the decimal point go? (a) 0.0558 (b) 0.558 (c) 5.58 (d) 55.8
9. 9.9.7 × 4 — where does the decimal point go? (a) 3.88 (b) 38.8 (c) 388 (d) 0.388
10. 10.2.4 × 0.4 — where does the decimal point go? (a) 9.6 (b) 0.096 (c) 0.0096 (d) 0.96
11. 11.4.8 × 7 — where does the decimal point go? (a) 33.6 (b) 0.336 (c) 3.36 (d) 336
12. 12.2.9 × 4.3 — where does the decimal point go? (a) 0.1247 (b) 124.7 (c) 12.47 (d) 1.247
13. 13.1.7 × 6 — where does the decimal point go? (a) 10.2 (b) 102 (c) 1.02 (d) 0.102
14. 14.0.33 × 1.7 — where does the decimal point go? (a) 5.61 (b) 0.0561 (c) 0.561 (d) 0.00561
15. 15.9.7 × 24 — where does the decimal point go? (a) 232.8 (b) 23.28 (c) 2.328 (d) 2328
16. 16.0.37 × 3.5 — where does the decimal point go? (a) 0.01295 (b) 1.295 (c) 12.95 (d) 0.1295
17. 17.4.4 × 12 — where does the decimal point go? (a) 0.528 (b) 528 (c) 5.28 (d) 52.8
18. 18.0.96 × 0.4 — where does the decimal point go? (a) 0.0384 (b) 3.84 (c) 0.00384 (d) 0.384
19. 19.0.19 × 4.8 — where does the decimal point go? (a) 0.912 (b) 0.0912 (c) 9.12 (d) 0.00912
20. 20.0.22 × 7 — where does the decimal point go? (a) 0.0154 (b) 1.54 (c) 15.4 (d) 0.154
21. 21.7.1 × 0.7 — where does the decimal point go? (a) 0.497 (b) 0.0497 (c) 49.7 (d) 4.97
22. 22.5.3 × 18 — where does the decimal point go? (a) 9.54 (b) 0.954 (c) 954 (d) 95.4
23. 23.0.17 × 5 — where does the decimal point go? (a) 0.0085 (b) 8.5 (c) 0.085 (d) 0.85
24. 24.3.6 × 18 — where does the decimal point go? (a) 6.48 (b) 648 (c) 64.8 (d) 0.648
25. 25.0.59 × 26 — where does the decimal point go? (a) 0.1534 (b) 1.534 (c) 153.4 (d) 15.34
26. 26.4.5 × 4.9 — where does the decimal point go? (a) 2.205 (b) 22.05 (c) 0.2205 (d) 220.5
27. 27.0.13 × 5 — where does the decimal point go? (a) 0.65 (b) 0.065 (c) 0.0065 (d) 6.5
28. 28.1.8 × 3 — where does the decimal point go? (a) 5.4 (b) 54 (c) 0.54 (d) 0.054
29. 29.0.51 × 8 — where does the decimal point go? (a) 0.0408 (b) 4.08 (c) 0.408 (d) 40.8
30. 30.4.3 × 12 — where does the decimal point go? (a) 516 (b) 5.16 (c) 0.516 (d) 51.6
31. 31.1.9 × 0.2 — where does the decimal point go? (a) 0.0038 (b) 0.038 (c) 3.8 (d) 0.38
32. 32.8.2 × 12 — where does the decimal point go? (a) 984 (b) 9.84 (c) 98.4 (d) 0.984
33. 33.7.4 × 0.7 — where does the decimal point go? (a) 0.0518 (b) 5.18 (c) 0.518 (d) 51.8
34. 34.0.34 × 2.6 — where does the decimal point go? (a) 0.0884 (b) 8.84 (c) 0.884 (d) 0.00884
35. 35.6.8 × 0.3 — where does the decimal point go? (a) 0.204 (b) 2.04 (c) 20.4 (d) 0.0204
36. 36.0.31 × 0.6 — where does the decimal point go? (a) 1.86 (b) 0.0186 (c) 0.186 (d) 0.00186
37. 37.6.7 × 3.6 — where does the decimal point go? (a) 24.12 (b) 2.412 (c) 241.2 (d) 0.2412
38. 38.0.64 × 0.9 — where does the decimal point go? (a) 0.00576 (b) 0.0576 (c) 5.76 (d) 0.576
39. 39.0.69 × 18 — where does the decimal point go? (a) 1.242 (b) 12.42 (c) 124.2 (d) 0.1242
40. 40.7.9 × 2 — where does the decimal point go? (a) 0.158 (b) 1.58 (c) 158 (d) 15.8

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