Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 561 · 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. 1.9.1 × 44 — where does the decimal point go? (a) 40.04 (b) 400.4 (c) 4004 (d) 4.004
2. 2.4.3 × 36 — where does the decimal point go? (a) 15.48 (b) 1.548 (c) 1548 (d) 154.8
3. 3.1.7 × 21 — where does the decimal point go? (a) 3.57 (b) 0.357 (c) 357 (d) 35.7
4. 4.0.66 × 1.2 — where does the decimal point go? (a) 0.792 (b) 0.00792 (c) 7.92 (d) 0.0792
5. 5.9.3 × 9 — where does the decimal point go? (a) 83.7 (b) 0.837 (c) 837 (d) 8.37
6. 6.2.4 × 0.3 — where does the decimal point go? (a) 0.72 (b) 7.2 (c) 0.072 (d) 0.0072
7. 7.0.26 × 11 — where does the decimal point go? (a) 0.0286 (b) 2.86 (c) 0.286 (d) 28.6
8. 8.3.5 × 23 — where does the decimal point go? (a) 8.05 (b) 805 (c) 0.805 (d) 80.5
9. 9.3.6 × 0.4 — where does the decimal point go? (a) 0.144 (b) 0.0144 (c) 14.4 (d) 1.44
10. 10.0.26 × 3.8 — where does the decimal point go? (a) 0.0988 (b) 9.88 (c) 0.00988 (d) 0.988
11. 11.8.3 × 35 — where does the decimal point go? (a) 29.05 (b) 2905 (c) 2.905 (d) 290.5
12. 12.0.37 × 0.5 — where does the decimal point go? (a) 1.85 (b) 0.185 (c) 0.00185 (d) 0.0185
13. 13.0.59 × 4 — where does the decimal point go? (a) 0.236 (b) 23.6 (c) 0.0236 (d) 2.36
14. 14.3.3 × 5 — where does the decimal point go? (a) 1.65 (b) 16.5 (c) 165 (d) 0.165
15. 15.0.79 × 0.3 — where does the decimal point go? (a) 0.0237 (b) 0.237 (c) 2.37 (d) 0.00237
16. 16.0.93 × 9 — where does the decimal point go? (a) 8.37 (b) 83.7 (c) 0.0837 (d) 0.837
17. 17.4.3 × 0.2 — where does the decimal point go? (a) 0.0086 (b) 8.6 (c) 0.86 (d) 0.086
18. 18.0.34 × 3 — where does the decimal point go? (a) 0.102 (b) 10.2 (c) 1.02 (d) 0.0102
19. 19.3.4 × 3 — where does the decimal point go? (a) 10.2 (b) 1.02 (c) 0.102 (d) 102
20. 20.0.23 × 7 — where does the decimal point go? (a) 0.0161 (b) 0.161 (c) 16.1 (d) 1.61
21. 21.1.6 × 8 — where does the decimal point go? (a) 12.8 (b) 128 (c) 1.28 (d) 0.128
22. 22.6.8 × 0.3 — where does the decimal point go? (a) 2.04 (b) 0.204 (c) 20.4 (d) 0.0204
23. 23.8.6 × 27 — where does the decimal point go? (a) 23.22 (b) 2.322 (c) 232.2 (d) 2322
24. 24.0.23 × 1.3 — where does the decimal point go? (a) 2.99 (b) 0.00299 (c) 0.0299 (d) 0.299
25. 25.8.3 × 18 — where does the decimal point go? (a) 1.494 (b) 149.4 (c) 14.94 (d) 1494
26. 26.3.2 × 0.2 — where does the decimal point go? (a) 6.4 (b) 0.064 (c) 0.64 (d) 0.0064
27. 27.0.12 × 8 — where does the decimal point go? (a) 0.0096 (b) 9.6 (c) 0.096 (d) 0.96
28. 28.0.96 × 0.8 — where does the decimal point go? (a) 0.768 (b) 0.00768 (c) 7.68 (d) 0.0768
29. 29.0.47 × 32 — where does the decimal point go? (a) 1.504 (b) 15.04 (c) 150.4 (d) 0.1504
30. 30.0.48 × 1.9 — where does the decimal point go? (a) 0.0912 (b) 0.00912 (c) 0.912 (d) 9.12
31. 31.0.35 × 2.1 — where does the decimal point go? (a) 7.35 (b) 0.00735 (c) 0.0735 (d) 0.735
32. 32.2.8 × 2.8 — where does the decimal point go? (a) 7.84 (b) 0.0784 (c) 0.784 (d) 78.4
33. 33.0.61 × 8 — where does the decimal point go? (a) 4.88 (b) 0.488 (c) 48.8 (d) 0.0488
34. 34.0.26 × 2.7 — where does the decimal point go? (a) 0.0702 (b) 7.02 (c) 0.00702 (d) 0.702
35. 35.0.18 × 0.7 — where does the decimal point go? (a) 0.0126 (b) 1.26 (c) 0.00126 (d) 0.126
36. 36.7.8 × 7 — where does the decimal point go? (a) 5.46 (b) 546 (c) 0.546 (d) 54.6
37. 37.0.98 × 21 — where does the decimal point go? (a) 2.058 (b) 205.8 (c) 0.2058 (d) 20.58
38. 38.0.84 × 2 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 1.68 (d) 16.8
39. 39.0.56 × 4 — where does the decimal point go? (a) 2.24 (b) 0.224 (c) 22.4 (d) 0.0224
40. 40.0.27 × 0.5 — where does the decimal point go? (a) 0.00135 (b) 0.135 (c) 1.35 (d) 0.0135

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