Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 355 · 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. 1.2.1 × 9 — where does the decimal point go? (a) 1.89 (b) 189 (c) 18.9 (d) 0.189
2. 2.4.2 × 3.6 — where does the decimal point go? (a) 0.1512 (b) 15.12 (c) 1.512 (d) 151.2
3. 3.0.52 × 26 — where does the decimal point go? (a) 0.1352 (b) 135.2 (c) 13.52 (d) 1.352
4. 4.7.6 × 16 — where does the decimal point go? (a) 12.16 (b) 1216 (c) 121.6 (d) 1.216
5. 5.3.3 × 21 — where does the decimal point go? (a) 6.93 (b) 69.3 (c) 693 (d) 0.693
6. 6.2.9 × 28 — where does the decimal point go? (a) 812 (b) 81.2 (c) 8.12 (d) 0.812
7. 7.5.5 × 4.5 — where does the decimal point go? (a) 247.5 (b) 0.2475 (c) 2.475 (d) 24.75
8. 8.2.2 × 3.3 — where does the decimal point go? (a) 72.6 (b) 0.0726 (c) 0.726 (d) 7.26
9. 9.0.71 × 0.2 — where does the decimal point go? (a) 1.42 (b) 0.0142 (c) 0.142 (d) 0.00142
10. 10.7.2 × 18 — where does the decimal point go? (a) 12.96 (b) 129.6 (c) 1296 (d) 1.296
11. 11.8.8 × 8 — where does the decimal point go? (a) 70.4 (b) 704 (c) 7.04 (d) 0.704
12. 12.0.17 × 0.3 — where does the decimal point go? (a) 0.00051 (b) 0.51 (c) 0.051 (d) 0.0051
13. 13.0.74 × 9 — where does the decimal point go? (a) 66.6 (b) 6.66 (c) 0.666 (d) 0.0666
14. 14.9.9 × 4 — where does the decimal point go? (a) 0.396 (b) 396 (c) 3.96 (d) 39.6
15. 15.0.21 × 22 — where does the decimal point go? (a) 0.462 (b) 46.2 (c) 4.62 (d) 0.0462
16. 16.0.72 × 4.6 — where does the decimal point go? (a) 0.03312 (b) 33.12 (c) 0.3312 (d) 3.312
17. 17.4.7 × 3 — where does the decimal point go? (a) 141 (b) 0.141 (c) 1.41 (d) 14.1
18. 18.7.8 × 0.6 — where does the decimal point go? (a) 46.8 (b) 4.68 (c) 0.0468 (d) 0.468
19. 19.0.95 × 1.5 — where does the decimal point go? (a) 0.1425 (b) 0.01425 (c) 14.25 (d) 1.425
20. 20.5.4 × 0.6 — where does the decimal point go? (a) 3.24 (b) 0.0324 (c) 32.4 (d) 0.324
21. 21.8.2 × 7 — where does the decimal point go? (a) 57.4 (b) 574 (c) 0.574 (d) 5.74
22. 22.3.7 × 0.2 — where does the decimal point go? (a) 0.74 (b) 0.074 (c) 0.0074 (d) 7.4
23. 23.2.9 × 7 — where does the decimal point go? (a) 20.3 (b) 2.03 (c) 0.203 (d) 203
24. 24.0.84 × 9 — where does the decimal point go? (a) 7.56 (b) 0.0756 (c) 75.6 (d) 0.756
25. 25.9.3 × 0.8 — where does the decimal point go? (a) 74.4 (b) 7.44 (c) 0.744 (d) 0.0744
26. 26.0.15 × 0.3 — where does the decimal point go? (a) 0.0045 (b) 0.045 (c) 0.45 (d) 0.00045
27. 27.7.7 × 0.2 — where does the decimal point go? (a) 15.4 (b) 1.54 (c) 0.154 (d) 0.0154
28. 28.0.46 × 8 — where does the decimal point go? (a) 3.68 (b) 36.8 (c) 0.368 (d) 0.0368
29. 29.0.62 × 4.7 — where does the decimal point go? (a) 0.02914 (b) 0.2914 (c) 29.14 (d) 2.914
30. 30.0.77 × 0.8 — where does the decimal point go? (a) 6.16 (b) 0.0616 (c) 0.616 (d) 0.00616
31. 31.2.4 × 48 — where does the decimal point go? (a) 1.152 (b) 1152 (c) 11.52 (d) 115.2
32. 32.8.4 × 4.3 — where does the decimal point go? (a) 3.612 (b) 0.3612 (c) 361.2 (d) 36.12
33. 33.0.88 × 3.7 — where does the decimal point go? (a) 0.03256 (b) 0.3256 (c) 32.56 (d) 3.256
34. 34.0.32 × 9 — where does the decimal point go? (a) 0.288 (b) 0.0288 (c) 2.88 (d) 28.8
35. 35.5.1 × 1.6 — where does the decimal point go? (a) 0.816 (b) 0.0816 (c) 81.6 (d) 8.16
36. 36.4.4 × 0.6 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 2.64 (d) 0.0264
37. 37.8.3 × 31 — where does the decimal point go? (a) 257.3 (b) 2573 (c) 25.73 (d) 2.573
38. 38.0.39 × 0.9 — where does the decimal point go? (a) 0.351 (b) 0.0351 (c) 0.00351 (d) 3.51
39. 39.2.4 × 3 — where does the decimal point go? (a) 7.2 (b) 72 (c) 0.072 (d) 0.72
40. 40.5.3 × 3.3 — where does the decimal point go? (a) 1.749 (b) 0.1749 (c) 174.9 (d) 17.49

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