Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 465 · 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. 1.5.4 × 4 — where does the decimal point go? (a) 216 (b) 0.216 (c) 21.6 (d) 2.16
2. 2.0.93 × 4.2 — where does the decimal point go? (a) 0.3906 (b) 39.06 (c) 3.906 (d) 0.03906
3. 3.8.1 × 22 — where does the decimal point go? (a) 17.82 (b) 1782 (c) 178.2 (d) 1.782
4. 4.9.6 × 4.4 — where does the decimal point go? (a) 42.24 (b) 0.4224 (c) 422.4 (d) 4.224
5. 5.4.9 × 0.6 — where does the decimal point go? (a) 2.94 (b) 0.0294 (c) 29.4 (d) 0.294
6. 6.7.9 × 5 — where does the decimal point go? (a) 395 (b) 0.395 (c) 39.5 (d) 3.95
7. 7.0.64 × 0.6 — where does the decimal point go? (a) 0.00384 (b) 0.384 (c) 3.84 (d) 0.0384
8. 8.7.4 × 4 — where does the decimal point go? (a) 296 (b) 0.296 (c) 2.96 (d) 29.6
9. 9.2.7 × 0.3 — where does the decimal point go? (a) 0.0081 (b) 8.1 (c) 0.081 (d) 0.81
10. 10.0.67 × 5 — where does the decimal point go? (a) 0.0335 (b) 3.35 (c) 33.5 (d) 0.335
11. 11.0.43 × 0.6 — where does the decimal point go? (a) 2.58 (b) 0.0258 (c) 0.00258 (d) 0.258
12. 12.0.35 × 7 — where does the decimal point go? (a) 2.45 (b) 0.245 (c) 0.0245 (d) 24.5
13. 13.0.26 × 8 — where does the decimal point go? (a) 2.08 (b) 0.208 (c) 0.0208 (d) 20.8
14. 14.0.36 × 23 — where does the decimal point go? (a) 8.28 (b) 82.8 (c) 0.0828 (d) 0.828
15. 15.0.89 × 3 — where does the decimal point go? (a) 2.67 (b) 0.0267 (c) 26.7 (d) 0.267
16. 16.6.1 × 0.5 — where does the decimal point go? (a) 0.305 (b) 3.05 (c) 0.0305 (d) 30.5
17. 17.0.13 × 4.9 — where does the decimal point go? (a) 6.37 (b) 0.00637 (c) 0.0637 (d) 0.637
18. 18.2.2 × 11 — where does the decimal point go? (a) 24.2 (b) 2.42 (c) 0.242 (d) 242
19. 19.0.77 × 0.8 — where does the decimal point go? (a) 0.00616 (b) 6.16 (c) 0.0616 (d) 0.616
20. 20.6.9 × 0.8 — where does the decimal point go? (a) 0.552 (b) 5.52 (c) 55.2 (d) 0.0552
21. 21.5.9 × 7 — where does the decimal point go? (a) 413 (b) 41.3 (c) 4.13 (d) 0.413
22. 22.5.7 × 4 — where does the decimal point go? (a) 2.28 (b) 22.8 (c) 228 (d) 0.228
23. 23.0.94 × 18 — where does the decimal point go? (a) 1.692 (b) 16.92 (c) 169.2 (d) 0.1692
24. 24.3.3 × 9 — where does the decimal point go? (a) 297 (b) 29.7 (c) 0.297 (d) 2.97
25. 25.1.3 × 0.3 — where does the decimal point go? (a) 0.39 (b) 3.9 (c) 0.0039 (d) 0.039
26. 26.0.87 × 2 — where does the decimal point go? (a) 0.174 (b) 0.0174 (c) 1.74 (d) 17.4
27. 27.0.77 × 5 — where does the decimal point go? (a) 0.385 (b) 38.5 (c) 0.0385 (d) 3.85
28. 28.9.9 × 3.4 — where does the decimal point go? (a) 3.366 (b) 33.66 (c) 0.3366 (d) 336.6
29. 29.0.83 × 0.8 — where does the decimal point go? (a) 0.00664 (b) 0.0664 (c) 6.64 (d) 0.664
30. 30.6.2 × 2 — where does the decimal point go? (a) 1.24 (b) 0.124 (c) 12.4 (d) 124
31. 31.0.79 × 34 — where does the decimal point go? (a) 2.686 (b) 268.6 (c) 0.2686 (d) 26.86
32. 32.3.8 × 24 — where does the decimal point go? (a) 91.2 (b) 0.912 (c) 9.12 (d) 912
33. 33.4.2 × 46 — where does the decimal point go? (a) 19.32 (b) 1932 (c) 1.932 (d) 193.2
34. 34.0.52 × 0.8 — where does the decimal point go? (a) 0.00416 (b) 0.416 (c) 4.16 (d) 0.0416
35. 35.0.33 × 22 — where does the decimal point go? (a) 72.6 (b) 0.726 (c) 0.0726 (d) 7.26
36. 36.0.66 × 2 — where does the decimal point go? (a) 1.32 (b) 0.132 (c) 13.2 (d) 0.0132
37. 37.9.8 × 4.6 — where does the decimal point go? (a) 4.508 (b) 45.08 (c) 450.8 (d) 0.4508
38. 38.0.82 × 0.2 — where does the decimal point go? (a) 0.164 (b) 0.0164 (c) 0.00164 (d) 1.64
39. 39.5.3 × 21 — where does the decimal point go? (a) 1113 (b) 1.113 (c) 11.13 (d) 111.3
40. 40.0.35 × 19 — where does the decimal point go? (a) 6.65 (b) 66.5 (c) 0.665 (d) 0.0665

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