Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 592 · 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. 1.6.1 × 5 — where does the decimal point go? (a) 0.305 (b) 30.5 (c) 305 (d) 3.05
2. 2.0.76 × 8 — where does the decimal point go? (a) 60.8 (b) 0.0608 (c) 0.608 (d) 6.08
3. 3.0.83 × 0.9 — where does the decimal point go? (a) 0.747 (b) 7.47 (c) 0.0747 (d) 0.00747
4. 4.0.17 × 4.3 — where does the decimal point go? (a) 0.731 (b) 0.0731 (c) 0.00731 (d) 7.31
5. 5.3.8 × 27 — where does the decimal point go? (a) 102.6 (b) 1026 (c) 1.026 (d) 10.26
6. 6.0.56 × 2 — where does the decimal point go? (a) 1.12 (b) 0.0112 (c) 0.112 (d) 11.2
7. 7.4.8 × 2 — where does the decimal point go? (a) 96 (b) 9.6 (c) 0.096 (d) 0.96
8. 8.0.63 × 6 — where does the decimal point go? (a) 0.378 (b) 37.8 (c) 3.78 (d) 0.0378
9. 9.8.7 × 4.5 — where does the decimal point go? (a) 3.915 (b) 39.15 (c) 0.3915 (d) 391.5
10. 10.0.81 × 9 — where does the decimal point go? (a) 72.9 (b) 7.29 (c) 0.729 (d) 0.0729
11. 11.3.1 × 2 — where does the decimal point go? (a) 6.2 (b) 0.062 (c) 0.62 (d) 62
12. 12.0.18 × 0.6 — where does the decimal point go? (a) 0.0108 (b) 1.08 (c) 0.00108 (d) 0.108
13. 13.3.9 × 45 — where does the decimal point go? (a) 175.5 (b) 1755 (c) 17.55 (d) 1.755
14. 14.1.8 × 0.4 — where does the decimal point go? (a) 0.0072 (b) 0.72 (c) 7.2 (d) 0.072
15. 15.0.83 × 5 — where does the decimal point go? (a) 0.0415 (b) 4.15 (c) 41.5 (d) 0.415
16. 16.5.7 × 12 — where does the decimal point go? (a) 0.684 (b) 684 (c) 68.4 (d) 6.84
17. 17.3.6 × 3.4 — where does the decimal point go? (a) 12.24 (b) 1.224 (c) 122.4 (d) 0.1224
18. 18.4.8 × 0.8 — where does the decimal point go? (a) 0.384 (b) 0.0384 (c) 3.84 (d) 38.4
19. 19.2.9 × 16 — where does the decimal point go? (a) 46.4 (b) 4.64 (c) 464 (d) 0.464
20. 20.3.8 × 0.9 — where does the decimal point go? (a) 0.342 (b) 3.42 (c) 0.0342 (d) 34.2
21. 21.5.8 × 0.7 — where does the decimal point go? (a) 0.0406 (b) 0.406 (c) 40.6 (d) 4.06
22. 22.7.7 × 0.6 — where does the decimal point go? (a) 46.2 (b) 0.462 (c) 0.0462 (d) 4.62
23. 23.0.62 × 24 — where does the decimal point go? (a) 0.1488 (b) 14.88 (c) 1.488 (d) 148.8
24. 24.3.7 × 46 — where does the decimal point go? (a) 170.2 (b) 1.702 (c) 1702 (d) 17.02
25. 25.6.5 × 25 — where does the decimal point go? (a) 1625 (b) 162.5 (c) 16.25 (d) 1.625
26. 26.4.2 × 2 — where does the decimal point go? (a) 8.4 (b) 0.084 (c) 0.84 (d) 84
27. 27.0.21 × 0.6 — where does the decimal point go? (a) 1.26 (b) 0.00126 (c) 0.0126 (d) 0.126
28. 28.3.3 × 4.8 — where does the decimal point go? (a) 0.1584 (b) 1.584 (c) 158.4 (d) 15.84
29. 29.0.69 × 0.2 — where does the decimal point go? (a) 0.0138 (b) 0.00138 (c) 0.138 (d) 1.38
30. 30.0.68 × 38 — where does the decimal point go? (a) 258.4 (b) 2.584 (c) 25.84 (d) 0.2584
31. 31.9.2 × 41 — where does the decimal point go? (a) 37.72 (b) 3.772 (c) 377.2 (d) 3772
32. 32.5.4 × 13 — where does the decimal point go? (a) 70.2 (b) 7.02 (c) 0.702 (d) 702
33. 33.5.1 × 0.8 — where does the decimal point go? (a) 40.8 (b) 0.408 (c) 0.0408 (d) 4.08
34. 34.2.7 × 0.2 — where does the decimal point go? (a) 0.54 (b) 0.054 (c) 5.4 (d) 0.0054
35. 35.4.6 × 9 — where does the decimal point go? (a) 41.4 (b) 4.14 (c) 0.414 (d) 414
36. 36.3.7 × 3 — where does the decimal point go? (a) 11.1 (b) 1.11 (c) 0.111 (d) 111
37. 37.0.42 × 33 — where does the decimal point go? (a) 13.86 (b) 1.386 (c) 138.6 (d) 0.1386
38. 38.0.85 × 3.1 — where does the decimal point go? (a) 26.35 (b) 2.635 (c) 0.2635 (d) 0.02635
39. 39.0.33 × 31 — where does the decimal point go? (a) 1.023 (b) 102.3 (c) 0.1023 (d) 10.23
40. 40.5.6 × 2.7 — where does the decimal point go? (a) 0.1512 (b) 15.12 (c) 151.2 (d) 1.512

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