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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 902 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.0.55 × 4.1 — where does the decimal point go? (a) 2.255 (b) 0.02255 (c) 22.55 (d) 0.2255
  2. 2.6.3 × 8 — where does the decimal point go? (a) 50.4 (b) 504 (c) 0.504 (d) 5.04
  3. 3.0.68 × 6 — where does the decimal point go? (a) 0.0408 (b) 0.408 (c) 4.08 (d) 40.8
  4. 4.0.52 × 9 — where does the decimal point go? (a) 4.68 (b) 0.0468 (c) 46.8 (d) 0.468
  5. 5.0.95 × 33 — where does the decimal point go? (a) 31.35 (b) 313.5 (c) 0.3135 (d) 3.135
  6. 6.0.32 × 8 — where does the decimal point go? (a) 0.256 (b) 25.6 (c) 0.0256 (d) 2.56
  7. 7.3.1 × 0.5 — where does the decimal point go? (a) 0.0155 (b) 1.55 (c) 0.155 (d) 15.5
  8. 8.8.1 × 4 — where does the decimal point go? (a) 0.324 (b) 3.24 (c) 324 (d) 32.4
  9. 9.0.87 × 2 — where does the decimal point go? (a) 17.4 (b) 1.74 (c) 0.0174 (d) 0.174
  10. 10.0.24 × 9 — where does the decimal point go? (a) 0.216 (b) 21.6 (c) 2.16 (d) 0.0216
  11. 11.7.9 × 4.6 — where does the decimal point go? (a) 36.34 (b) 363.4 (c) 0.3634 (d) 3.634
  12. 12.6.6 × 7 — where does the decimal point go? (a) 46.2 (b) 462 (c) 0.462 (d) 4.62
  13. 13.0.68 × 4 — where does the decimal point go? (a) 0.272 (b) 2.72 (c) 0.0272 (d) 27.2
  14. 14.9.1 × 37 — where does the decimal point go? (a) 3367 (b) 3.367 (c) 336.7 (d) 33.67
  15. 15.0.84 × 9 — where does the decimal point go? (a) 0.0756 (b) 0.756 (c) 75.6 (d) 7.56
  16. 16.7.6 × 24 — where does the decimal point go? (a) 1.824 (b) 18.24 (c) 182.4 (d) 1824
  17. 17.0.96 × 0.8 — where does the decimal point go? (a) 7.68 (b) 0.00768 (c) 0.0768 (d) 0.768
  18. 18.2.1 × 24 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 504 (d) 50.4
  19. 19.0.65 × 1.9 — where does the decimal point go? (a) 1.235 (b) 12.35 (c) 0.01235 (d) 0.1235
  20. 20.3.3 × 0.8 — where does the decimal point go? (a) 0.264 (b) 0.0264 (c) 26.4 (d) 2.64
  21. 21.5.9 × 0.9 — where does the decimal point go? (a) 53.1 (b) 0.531 (c) 0.0531 (d) 5.31
  22. 22.0.24 × 44 — where does the decimal point go? (a) 10.56 (b) 105.6 (c) 0.1056 (d) 1.056
  23. 23.1.6 × 19 — where does the decimal point go? (a) 304 (b) 30.4 (c) 3.04 (d) 0.304
  24. 24.7.4 × 0.2 — where does the decimal point go? (a) 14.8 (b) 1.48 (c) 0.148 (d) 0.0148
  25. 25.6.6 × 8 — where does the decimal point go? (a) 0.528 (b) 528 (c) 5.28 (d) 52.8
  26. 26.0.61 × 1.1 — where does the decimal point go? (a) 0.00671 (b) 0.671 (c) 0.0671 (d) 6.71
  27. 27.0.36 × 4.6 — where does the decimal point go? (a) 16.56 (b) 0.1656 (c) 0.01656 (d) 1.656
  28. 28.0.26 × 7 — where does the decimal point go? (a) 0.182 (b) 18.2 (c) 1.82 (d) 0.0182
  29. 29.0.88 × 3.3 — where does the decimal point go? (a) 2.904 (b) 29.04 (c) 0.02904 (d) 0.2904
  30. 30.0.72 × 1.4 — where does the decimal point go? (a) 1.008 (b) 0.1008 (c) 10.08 (d) 0.01008
  31. 31.2.9 × 1.1 — where does the decimal point go? (a) 0.0319 (b) 31.9 (c) 3.19 (d) 0.319
  32. 32.0.36 × 11 — where does the decimal point go? (a) 39.6 (b) 0.396 (c) 3.96 (d) 0.0396
  33. 33.3.9 × 0.7 — where does the decimal point go? (a) 0.273 (b) 2.73 (c) 27.3 (d) 0.0273
  34. 34.1.9 × 2 — where does the decimal point go? (a) 0.38 (b) 38 (c) 0.038 (d) 3.8
  35. 35.2.8 × 0.3 — where does the decimal point go? (a) 0.084 (b) 0.0084 (c) 0.84 (d) 8.4
  36. 36.8.9 × 4.2 — where does the decimal point go? (a) 37.38 (b) 3.738 (c) 373.8 (d) 0.3738
  37. 37.0.45 × 0.3 — where does the decimal point go? (a) 0.0135 (b) 0.00135 (c) 0.135 (d) 1.35
  38. 38.0.56 × 0.3 — where does the decimal point go? (a) 0.0168 (b) 0.00168 (c) 0.168 (d) 1.68
  39. 39.0.54 × 9 — where does the decimal point go? (a) 4.86 (b) 0.486 (c) 48.6 (d) 0.0486
  40. 40.1.2 × 1.7 — where does the decimal point go? (a) 0.0204 (b) 0.204 (c) 20.4 (d) 2.04

Answer key

  1. 2.255
  2. 50.4
  3. 4.08
  4. 4.68
  5. 31.35
  6. 2.56
  7. 1.55
  8. 32.4
  9. 1.74
  10. 2.16
  11. 36.34
  12. 46.2
  13. 2.72
  14. 336.7
  15. 7.56
  16. 182.4
  17. 0.768
  18. 50.4
  19. 1.235
  20. 2.64
  21. 5.31
  22. 10.56
  23. 30.4
  24. 1.48
  25. 52.8
  26. 0.671
  27. 1.656
  28. 1.82
  29. 2.904
  30. 1.008
  31. 3.19
  32. 3.96
  33. 2.73
  34. 3.8
  35. 0.84
  36. 37.38
  37. 0.135
  38. 0.168
  39. 4.86
  40. 2.04

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