Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 427 · 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. 1.9.7 × 5 — where does the decimal point go? (a) 4.85 (b) 485 (c) 0.485 (d) 48.5
2. 2.0.78 × 0.3 — where does the decimal point go? (a) 0.234 (b) 2.34 (c) 0.00234 (d) 0.0234
3. 3.2.1 × 6 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 126 (d) 0.126
4. 4.0.13 × 1.6 — where does the decimal point go? (a) 2.08 (b) 0.0208 (c) 0.208 (d) 0.00208
5. 5.0.18 × 1.2 — where does the decimal point go? (a) 0.00216 (b) 0.216 (c) 2.16 (d) 0.0216
6. 6.0.19 × 12 — where does the decimal point go? (a) 0.0228 (b) 0.228 (c) 22.8 (d) 2.28
7. 7.0.45 × 3 — where does the decimal point go? (a) 1.35 (b) 0.0135 (c) 0.135 (d) 13.5
8. 8.0.18 × 2.9 — where does the decimal point go? (a) 0.00522 (b) 5.22 (c) 0.0522 (d) 0.522
9. 9.5.3 × 2 — where does the decimal point go? (a) 0.106 (b) 10.6 (c) 106 (d) 1.06
10. 10.6.7 × 2 — where does the decimal point go? (a) 0.134 (b) 13.4 (c) 1.34 (d) 134
11. 11.7.9 × 48 — where does the decimal point go? (a) 3792 (b) 3.792 (c) 379.2 (d) 37.92
12. 12.0.15 × 2.3 — where does the decimal point go? (a) 0.345 (b) 0.0345 (c) 0.00345 (d) 3.45
13. 13.2.4 × 0.7 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.168 (d) 0.0168
14. 14.1.2 × 0.2 — where does the decimal point go? (a) 0.024 (b) 0.0024 (c) 0.24 (d) 2.4
15. 15.5.8 × 1.3 — where does the decimal point go? (a) 0.754 (b) 75.4 (c) 0.0754 (d) 7.54
16. 16.0.27 × 4.5 — where does the decimal point go? (a) 0.01215 (b) 0.1215 (c) 1.215 (d) 12.15
17. 17.9.4 × 17 — where does the decimal point go? (a) 1.598 (b) 159.8 (c) 15.98 (d) 1598
18. 18.0.52 × 11 — where does the decimal point go? (a) 57.2 (b) 0.0572 (c) 0.572 (d) 5.72
19. 19.0.67 × 0.6 — where does the decimal point go? (a) 0.0402 (b) 0.00402 (c) 0.402 (d) 4.02
20. 20.0.15 × 35 — where does the decimal point go? (a) 0.525 (b) 0.0525 (c) 52.5 (d) 5.25
21. 21.0.55 × 1.1 — where does the decimal point go? (a) 0.605 (b) 0.0605 (c) 0.00605 (d) 6.05
22. 22.5.5 × 11 — where does the decimal point go? (a) 6.05 (b) 60.5 (c) 0.605 (d) 605
23. 23.1.3 × 4.2 — where does the decimal point go? (a) 0.0546 (b) 5.46 (c) 0.546 (d) 54.6
24. 24.6.9 × 2 — where does the decimal point go? (a) 1.38 (b) 0.138 (c) 13.8 (d) 138
25. 25.4.8 × 0.7 — where does the decimal point go? (a) 3.36 (b) 0.336 (c) 33.6 (d) 0.0336
26. 26.5.9 × 11 — where does the decimal point go? (a) 0.649 (b) 649 (c) 64.9 (d) 6.49
27. 27.0.22 × 3.4 — where does the decimal point go? (a) 0.00748 (b) 0.0748 (c) 7.48 (d) 0.748
28. 28.0.41 × 19 — where does the decimal point go? (a) 7.79 (b) 0.0779 (c) 0.779 (d) 77.9
29. 29.2.5 × 5 — where does the decimal point go? (a) 12.5 (b) 1.25 (c) 0.125 (d) 125
30. 30.3.3 × 2.7 — where does the decimal point go? (a) 8.91 (b) 0.0891 (c) 0.891 (d) 89.1
31. 31.1.5 × 1.1 — where does the decimal point go? (a) 0.165 (b) 16.5 (c) 1.65 (d) 0.0165
32. 32.0.17 × 7 — where does the decimal point go? (a) 0.119 (b) 1.19 (c) 11.9 (d) 0.0119
33. 33.0.19 × 8 — where does the decimal point go? (a) 0.152 (b) 1.52 (c) 0.0152 (d) 15.2
34. 34.0.68 × 6 — where does the decimal point go? (a) 0.0408 (b) 40.8 (c) 0.408 (d) 4.08
35. 35.4.6 × 19 — where does the decimal point go? (a) 874 (b) 87.4 (c) 8.74 (d) 0.874
36. 36.3.5 × 0.3 — where does the decimal point go? (a) 0.105 (b) 0.0105 (c) 10.5 (d) 1.05
37. 37.2.7 × 23 — where does the decimal point go? (a) 6.21 (b) 621 (c) 62.1 (d) 0.621
38. 38.4.7 × 25 — where does the decimal point go? (a) 1175 (b) 117.5 (c) 1.175 (d) 11.75
39. 39.1.6 × 4.6 — where does the decimal point go? (a) 0.736 (b) 7.36 (c) 73.6 (d) 0.0736
40. 40.0.76 × 2.1 — where does the decimal point go? (a) 1.596 (b) 0.1596 (c) 15.96 (d) 0.01596

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