Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 921 · 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. 1.5.1 × 39 — where does the decimal point go? (a) 1.989 (b) 198.9 (c) 19.89 (d) 1989
2. 2.6.9 × 9 — where does the decimal point go? (a) 621 (b) 62.1 (c) 0.621 (d) 6.21
3. 3.1.7 × 3 — where does the decimal point go? (a) 5.1 (b) 0.51 (c) 51 (d) 0.051
4. 4.0.51 × 3 — where does the decimal point go? (a) 0.153 (b) 0.0153 (c) 15.3 (d) 1.53
5. 5.0.34 × 2.9 — where does the decimal point go? (a) 0.00986 (b) 0.0986 (c) 9.86 (d) 0.986
6. 6.5.6 × 0.6 — where does the decimal point go? (a) 3.36 (b) 0.336 (c) 33.6 (d) 0.0336
7. 7.0.62 × 34 — where does the decimal point go? (a) 2.108 (b) 21.08 (c) 0.2108 (d) 210.8
8. 8.0.48 × 46 — where does the decimal point go? (a) 0.2208 (b) 2.208 (c) 22.08 (d) 220.8
9. 9.7.6 × 48 — where does the decimal point go? (a) 3.648 (b) 3648 (c) 364.8 (d) 36.48
10. 10.6.8 × 2 — where does the decimal point go? (a) 13.6 (b) 0.136 (c) 136 (d) 1.36
11. 11.7.1 × 12 — where does the decimal point go? (a) 85.2 (b) 8.52 (c) 0.852 (d) 852
12. 12.9.8 × 6 — where does the decimal point go? (a) 0.588 (b) 5.88 (c) 58.8 (d) 588
13. 13.1.8 × 3 — where does the decimal point go? (a) 0.054 (b) 5.4 (c) 54 (d) 0.54
14. 14.6.3 × 2 — where does the decimal point go? (a) 12.6 (b) 126 (c) 0.126 (d) 1.26
15. 15.1.4 × 0.3 — where does the decimal point go? (a) 4.2 (b) 0.0042 (c) 0.42 (d) 0.042
16. 16.9.9 × 29 — where does the decimal point go? (a) 28.71 (b) 287.1 (c) 2.871 (d) 2871
17. 17.0.79 × 0.5 — where does the decimal point go? (a) 0.00395 (b) 0.0395 (c) 0.395 (d) 3.95
18. 18.0.48 × 3.4 — where does the decimal point go? (a) 0.1632 (b) 16.32 (c) 0.01632 (d) 1.632
19. 19.0.74 × 2.6 — where does the decimal point go? (a) 1.924 (b) 19.24 (c) 0.1924 (d) 0.01924
20. 20.9.5 × 1.1 — where does the decimal point go? (a) 1.045 (b) 0.1045 (c) 10.45 (d) 104.5
21. 21.0.98 × 0.7 — where does the decimal point go? (a) 0.0686 (b) 0.686 (c) 0.00686 (d) 6.86
22. 22.0.78 × 2.1 — where does the decimal point go? (a) 1.638 (b) 16.38 (c) 0.1638 (d) 0.01638
23. 23.0.13 × 16 — where does the decimal point go? (a) 0.208 (b) 0.0208 (c) 2.08 (d) 20.8
24. 24.9.9 × 0.4 — where does the decimal point go? (a) 0.396 (b) 0.0396 (c) 39.6 (d) 3.96
25. 25.0.89 × 2.9 — where does the decimal point go? (a) 25.81 (b) 2.581 (c) 0.02581 (d) 0.2581
26. 26.6.4 × 13 — where does the decimal point go? (a) 83.2 (b) 0.832 (c) 8.32 (d) 832
27. 27.8.8 × 2.3 — where does the decimal point go? (a) 0.2024 (b) 2.024 (c) 20.24 (d) 202.4
28. 28.0.57 × 39 — where does the decimal point go? (a) 222.3 (b) 2.223 (c) 0.2223 (d) 22.23
29. 29.0.89 × 3 — where does the decimal point go? (a) 0.0267 (b) 0.267 (c) 26.7 (d) 2.67
30. 30.5.2 × 1.8 — where does the decimal point go? (a) 9.36 (b) 93.6 (c) 0.0936 (d) 0.936
31. 31.2.4 × 36 — where does the decimal point go? (a) 0.864 (b) 86.4 (c) 8.64 (d) 864
32. 32.8.2 × 33 — where does the decimal point go? (a) 2706 (b) 270.6 (c) 2.706 (d) 27.06
33. 33.5.6 × 1.1 — where does the decimal point go? (a) 0.0616 (b) 6.16 (c) 61.6 (d) 0.616
34. 34.0.75 × 3 — where does the decimal point go? (a) 2.25 (b) 0.0225 (c) 0.225 (d) 22.5
35. 35.0.31 × 7 — where does the decimal point go? (a) 0.0217 (b) 21.7 (c) 0.217 (d) 2.17
36. 36.0.64 × 4 — where does the decimal point go? (a) 2.56 (b) 0.256 (c) 25.6 (d) 0.0256
37. 37.6.6 × 0.9 — where does the decimal point go? (a) 5.94 (b) 0.0594 (c) 0.594 (d) 59.4
38. 38.6.1 × 0.6 — where does the decimal point go? (a) 0.366 (b) 36.6 (c) 0.0366 (d) 3.66
39. 39.8.4 × 18 — where does the decimal point go? (a) 151.2 (b) 1.512 (c) 1512 (d) 15.12
40. 40.7.7 × 3 — where does the decimal point go? (a) 0.231 (b) 2.31 (c) 231 (d) 23.1

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