Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 974 · 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. 1.7.2 × 48 — where does the decimal point go? (a) 345.6 (b) 34.56 (c) 3.456 (d) 3456
2. 2.0.36 × 0.9 — where does the decimal point go? (a) 0.0324 (b) 0.324 (c) 0.00324 (d) 3.24
3. 3.0.64 × 2 — where does the decimal point go? (a) 0.0128 (b) 0.128 (c) 1.28 (d) 12.8
4. 4.0.53 × 5 — where does the decimal point go? (a) 26.5 (b) 0.0265 (c) 0.265 (d) 2.65
5. 5.8.6 × 0.8 — where does the decimal point go? (a) 0.0688 (b) 0.688 (c) 68.8 (d) 6.88
6. 6.5.7 × 4.1 — where does the decimal point go? (a) 23.37 (b) 2.337 (c) 0.2337 (d) 233.7
7. 7.0.96 × 8 — where does the decimal point go? (a) 0.0768 (b) 0.768 (c) 76.8 (d) 7.68
8. 8.1.3 × 47 — where does the decimal point go? (a) 611 (b) 6.11 (c) 0.611 (d) 61.1
9. 9.2.3 × 3.1 — where does the decimal point go? (a) 0.0713 (b) 71.3 (c) 7.13 (d) 0.713
10. 10.2.3 × 16 — where does the decimal point go? (a) 36.8 (b) 0.368 (c) 3.68 (d) 368
11. 11.0.25 × 17 — where does the decimal point go? (a) 0.0425 (b) 0.425 (c) 42.5 (d) 4.25
12. 12.0.83 × 0.3 — where does the decimal point go? (a) 0.249 (b) 2.49 (c) 0.0249 (d) 0.00249
13. 13.6.5 × 4.9 — where does the decimal point go? (a) 3.185 (b) 0.3185 (c) 31.85 (d) 318.5
14. 14.0.58 × 31 — where does the decimal point go? (a) 1.798 (b) 17.98 (c) 0.1798 (d) 179.8
15. 15.9.7 × 4 — where does the decimal point go? (a) 3.88 (b) 0.388 (c) 38.8 (d) 388
16. 16.0.96 × 1.4 — where does the decimal point go? (a) 0.1344 (b) 0.01344 (c) 1.344 (d) 13.44
17. 17.0.37 × 0.4 — where does the decimal point go? (a) 0.0148 (b) 0.00148 (c) 1.48 (d) 0.148
18. 18.8.4 × 7 — where does the decimal point go? (a) 5.88 (b) 58.8 (c) 588 (d) 0.588
19. 19.5.4 × 8 — where does the decimal point go? (a) 43.2 (b) 4.32 (c) 432 (d) 0.432
20. 20.3.5 × 3 — where does the decimal point go? (a) 0.105 (b) 10.5 (c) 1.05 (d) 105
21. 21.0.97 × 0.5 — where does the decimal point go? (a) 4.85 (b) 0.485 (c) 0.00485 (d) 0.0485
22. 22.0.98 × 0.7 — where does the decimal point go? (a) 0.0686 (b) 6.86 (c) 0.00686 (d) 0.686
23. 23.0.57 × 4 — where does the decimal point go? (a) 0.0228 (b) 0.228 (c) 22.8 (d) 2.28
24. 24.9.7 × 0.9 — where does the decimal point go? (a) 0.873 (b) 87.3 (c) 0.0873 (d) 8.73
25. 25.0.32 × 1.1 — where does the decimal point go? (a) 0.00352 (b) 0.352 (c) 3.52 (d) 0.0352
26. 26.0.84 × 43 — where does the decimal point go? (a) 36.12 (b) 3.612 (c) 0.3612 (d) 361.2
27. 27.7.3 × 5 — where does the decimal point go? (a) 0.365 (b) 365 (c) 3.65 (d) 36.5
28. 28.4.7 × 8 — where does the decimal point go? (a) 0.376 (b) 37.6 (c) 3.76 (d) 376
29. 29.0.64 × 23 — where does the decimal point go? (a) 14.72 (b) 0.1472 (c) 1.472 (d) 147.2
30. 30.0.81 × 0.6 — where does the decimal point go? (a) 0.00486 (b) 4.86 (c) 0.486 (d) 0.0486
31. 31.4.8 × 4 — where does the decimal point go? (a) 19.2 (b) 1.92 (c) 0.192 (d) 192
32. 32.2.7 × 7 — where does the decimal point go? (a) 0.189 (b) 1.89 (c) 189 (d) 18.9
33. 33.0.22 × 7 — where does the decimal point go? (a) 15.4 (b) 0.0154 (c) 1.54 (d) 0.154
34. 34.6.6 × 0.2 — where does the decimal point go? (a) 0.0132 (b) 0.132 (c) 13.2 (d) 1.32
35. 35.0.83 × 22 — where does the decimal point go? (a) 18.26 (b) 1.826 (c) 182.6 (d) 0.1826
36. 36.0.31 × 1.6 — where does the decimal point go? (a) 4.96 (b) 0.496 (c) 0.0496 (d) 0.00496
37. 37.5.5 × 3 — where does the decimal point go? (a) 16.5 (b) 1.65 (c) 0.165 (d) 165
38. 38.8.1 × 31 — where does the decimal point go? (a) 251.1 (b) 2.511 (c) 2511 (d) 25.11
39. 39.1.9 × 4 — where does the decimal point go? (a) 0.076 (b) 7.6 (c) 0.76 (d) 76
40. 40.0.23 × 3 — where does the decimal point go? (a) 0.069 (b) 0.0069 (c) 6.9 (d) 0.69

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