Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 344 · 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. 1.0.39 × 2 — where does the decimal point go? (a) 0.078 (b) 7.8 (c) 0.0078 (d) 0.78
2. 2.3.1 × 15 — where does the decimal point go? (a) 4.65 (b) 0.465 (c) 465 (d) 46.5
3. 3.4.2 × 2 — where does the decimal point go? (a) 0.84 (b) 8.4 (c) 0.084 (d) 84
4. 4.0.61 × 0.3 — where does the decimal point go? (a) 0.0183 (b) 1.83 (c) 0.183 (d) 0.00183
5. 5.0.47 × 2.1 — where does the decimal point go? (a) 0.00987 (b) 0.987 (c) 9.87 (d) 0.0987
6. 6.0.99 × 0.8 — where does the decimal point go? (a) 0.00792 (b) 7.92 (c) 0.0792 (d) 0.792
7. 7.0.45 × 5 — where does the decimal point go? (a) 0.0225 (b) 0.225 (c) 2.25 (d) 22.5
8. 8.0.68 × 48 — where does the decimal point go? (a) 326.4 (b) 0.3264 (c) 3.264 (d) 32.64
9. 9.0.85 × 0.5 — where does the decimal point go? (a) 0.00425 (b) 0.0425 (c) 4.25 (d) 0.425
10. 10.0.57 × 9 — where does the decimal point go? (a) 0.0513 (b) 51.3 (c) 0.513 (d) 5.13
11. 11.0.29 × 24 — where does the decimal point go? (a) 6.96 (b) 69.6 (c) 0.0696 (d) 0.696
12. 12.2.3 × 0.6 — where does the decimal point go? (a) 0.138 (b) 13.8 (c) 0.0138 (d) 1.38
13. 13.8.4 × 2.3 — where does the decimal point go? (a) 1.932 (b) 0.1932 (c) 19.32 (d) 193.2
14. 14.9.3 × 18 — where does the decimal point go? (a) 1674 (b) 16.74 (c) 167.4 (d) 1.674
15. 15.3.9 × 6 — where does the decimal point go? (a) 2.34 (b) 23.4 (c) 0.234 (d) 234
16. 16.6.7 × 0.6 — where does the decimal point go? (a) 4.02 (b) 40.2 (c) 0.0402 (d) 0.402
17. 17.5.4 × 1.6 — where does the decimal point go? (a) 8.64 (b) 0.0864 (c) 86.4 (d) 0.864
18. 18.0.17 × 4 — where does the decimal point go? (a) 0.0068 (b) 0.068 (c) 6.8 (d) 0.68
19. 19.0.44 × 24 — where does the decimal point go? (a) 105.6 (b) 1.056 (c) 0.1056 (d) 10.56
20. 20.7.9 × 1.2 — where does the decimal point go? (a) 94.8 (b) 0.0948 (c) 0.948 (d) 9.48
21. 21.0.23 × 2.9 — where does the decimal point go? (a) 0.667 (b) 0.00667 (c) 0.0667 (d) 6.67
22. 22.0.42 × 6 — where does the decimal point go? (a) 2.52 (b) 0.0252 (c) 0.252 (d) 25.2
23. 23.9.6 × 32 — where does the decimal point go? (a) 307.2 (b) 30.72 (c) 3.072 (d) 3072
24. 24.0.61 × 0.5 — where does the decimal point go? (a) 0.0305 (b) 3.05 (c) 0.305 (d) 0.00305
25. 25.0.18 × 6 — where does the decimal point go? (a) 1.08 (b) 0.0108 (c) 10.8 (d) 0.108
26. 26.9.9 × 0.8 — where does the decimal point go? (a) 79.2 (b) 0.792 (c) 0.0792 (d) 7.92
27. 27.0.16 × 3.8 — where does the decimal point go? (a) 0.0608 (b) 0.00608 (c) 6.08 (d) 0.608
28. 28.9.4 × 0.3 — where does the decimal point go? (a) 2.82 (b) 28.2 (c) 0.282 (d) 0.0282
29. 29.1.2 × 1.6 — where does the decimal point go? (a) 1.92 (b) 0.0192 (c) 0.192 (d) 19.2
30. 30.0.68 × 4.6 — where does the decimal point go? (a) 3.128 (b) 31.28 (c) 0.03128 (d) 0.3128
31. 31.4.8 × 6 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 288 (d) 28.8
32. 32.0.12 × 2 — where does the decimal point go? (a) 0.24 (b) 2.4 (c) 0.024 (d) 0.0024
33. 33.6.1 × 17 — where does the decimal point go? (a) 1.037 (b) 10.37 (c) 1037 (d) 103.7
34. 34.0.74 × 0.9 — where does the decimal point go? (a) 6.66 (b) 0.0666 (c) 0.666 (d) 0.00666
35. 35.3.9 × 0.3 — where does the decimal point go? (a) 1.17 (b) 0.0117 (c) 0.117 (d) 11.7
36. 36.6.3 × 8 — where does the decimal point go? (a) 5.04 (b) 50.4 (c) 0.504 (d) 504
37. 37.0.99 × 2 — where does the decimal point go? (a) 1.98 (b) 19.8 (c) 0.198 (d) 0.0198
38. 38.8.7 × 0.8 — where does the decimal point go? (a) 6.96 (b) 0.0696 (c) 0.696 (d) 69.6
39. 39.4.2 × 33 — where does the decimal point go? (a) 13.86 (b) 1386 (c) 1.386 (d) 138.6
40. 40.4.1 × 0.3 — where does the decimal point go? (a) 12.3 (b) 0.123 (c) 1.23 (d) 0.0123

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