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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 693 · 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. 1.0.97 × 14 — where does the decimal point go? (a) 1.358 (b) 13.58 (c) 135.8 (d) 0.1358
  2. 2.7.2 × 42 — where does the decimal point go? (a) 3024 (b) 3.024 (c) 30.24 (d) 302.4
  3. 3.5.1 × 4 — where does the decimal point go? (a) 20.4 (b) 2.04 (c) 204 (d) 0.204
  4. 4.3.8 × 8 — where does the decimal point go? (a) 30.4 (b) 304 (c) 0.304 (d) 3.04
  5. 5.4.2 × 0.8 — where does the decimal point go? (a) 3.36 (b) 0.336 (c) 0.0336 (d) 33.6
  6. 6.0.12 × 27 — where does the decimal point go? (a) 0.0324 (b) 3.24 (c) 32.4 (d) 0.324
  7. 7.0.84 × 0.2 — where does the decimal point go? (a) 0.0168 (b) 1.68 (c) 0.168 (d) 0.00168
  8. 8.9.9 × 28 — where does the decimal point go? (a) 277.2 (b) 2772 (c) 27.72 (d) 2.772
  9. 9.5.7 × 4.8 — where does the decimal point go? (a) 27.36 (b) 273.6 (c) 2.736 (d) 0.2736
  10. 10.4.8 × 2 — where does the decimal point go? (a) 96 (b) 0.96 (c) 0.096 (d) 9.6
  11. 11.1.2 × 2 — where does the decimal point go? (a) 2.4 (b) 24 (c) 0.024 (d) 0.24
  12. 12.0.72 × 4 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 0.0288 (d) 28.8
  13. 13.2.5 × 3 — where does the decimal point go? (a) 0.75 (b) 7.5 (c) 75 (d) 0.075
  14. 14.3.7 × 11 — where does the decimal point go? (a) 407 (b) 4.07 (c) 40.7 (d) 0.407
  15. 15.2.6 × 2 — where does the decimal point go? (a) 0.052 (b) 0.52 (c) 52 (d) 5.2
  16. 16.7.3 × 4.9 — where does the decimal point go? (a) 3.577 (b) 0.3577 (c) 35.77 (d) 357.7
  17. 17.9.4 × 4 — where does the decimal point go? (a) 3.76 (b) 37.6 (c) 376 (d) 0.376
  18. 18.5.8 × 0.6 — where does the decimal point go? (a) 34.8 (b) 0.0348 (c) 3.48 (d) 0.348
  19. 19.1.6 × 9 — where does the decimal point go? (a) 0.144 (b) 14.4 (c) 1.44 (d) 144
  20. 20.0.51 × 0.7 — where does the decimal point go? (a) 0.0357 (b) 0.00357 (c) 3.57 (d) 0.357
  21. 21.8.5 × 4.1 — where does the decimal point go? (a) 3.485 (b) 348.5 (c) 0.3485 (d) 34.85
  22. 22.7.5 × 31 — where does the decimal point go? (a) 232.5 (b) 23.25 (c) 2325 (d) 2.325
  23. 23.7.3 × 1.5 — where does the decimal point go? (a) 10.95 (b) 0.1095 (c) 1.095 (d) 109.5
  24. 24.4.9 × 0.5 — where does the decimal point go? (a) 2.45 (b) 0.245 (c) 24.5 (d) 0.0245
  25. 25.0.17 × 1.2 — where does the decimal point go? (a) 2.04 (b) 0.0204 (c) 0.00204 (d) 0.204
  26. 26.0.29 × 3.4 — where does the decimal point go? (a) 0.0986 (b) 9.86 (c) 0.986 (d) 0.00986
  27. 27.3.7 × 23 — where does the decimal point go? (a) 851 (b) 8.51 (c) 0.851 (d) 85.1
  28. 28.1.6 × 1.3 — where does the decimal point go? (a) 0.0208 (b) 20.8 (c) 0.208 (d) 2.08
  29. 29.0.23 × 3 — where does the decimal point go? (a) 0.069 (b) 6.9 (c) 0.69 (d) 0.0069
  30. 30.6.7 × 2 — where does the decimal point go? (a) 1.34 (b) 13.4 (c) 0.134 (d) 134
  31. 31.5.7 × 39 — where does the decimal point go? (a) 222.3 (b) 2.223 (c) 2223 (d) 22.23
  32. 32.2.1 × 5 — where does the decimal point go? (a) 105 (b) 0.105 (c) 10.5 (d) 1.05
  33. 33.8.1 × 0.5 — where does the decimal point go? (a) 4.05 (b) 0.405 (c) 40.5 (d) 0.0405
  34. 34.0.85 × 3 — where does the decimal point go? (a) 0.255 (b) 25.5 (c) 2.55 (d) 0.0255
  35. 35.7.7 × 8 — where does the decimal point go? (a) 61.6 (b) 0.616 (c) 616 (d) 6.16
  36. 36.0.99 × 43 — where does the decimal point go? (a) 0.4257 (b) 425.7 (c) 4.257 (d) 42.57
  37. 37.0.17 × 26 — where does the decimal point go? (a) 4.42 (b) 44.2 (c) 0.0442 (d) 0.442
  38. 38.0.61 × 0.7 — where does the decimal point go? (a) 0.0427 (b) 0.427 (c) 4.27 (d) 0.00427
  39. 39.2.1 × 0.2 — where does the decimal point go? (a) 4.2 (b) 0.0042 (c) 0.42 (d) 0.042
  40. 40.7.7 × 0.3 — where does the decimal point go? (a) 23.1 (b) 2.31 (c) 0.231 (d) 0.0231

Answer key

  1. 13.58
  2. 302.4
  3. 20.4
  4. 30.4
  5. 3.36
  6. 3.24
  7. 0.168
  8. 277.2
  9. 27.36
  10. 9.6
  11. 2.4
  12. 2.88
  13. 7.5
  14. 40.7
  15. 5.2
  16. 35.77
  17. 37.6
  18. 3.48
  19. 14.4
  20. 0.357
  21. 34.85
  22. 232.5
  23. 10.95
  24. 2.45
  25. 0.204
  26. 0.986
  27. 85.1
  28. 2.08
  29. 0.69
  30. 13.4
  31. 222.3
  32. 10.5
  33. 4.05
  34. 2.55
  35. 61.6
  36. 42.57
  37. 4.42
  38. 0.427
  39. 0.42
  40. 2.31

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