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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 689 · 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. 1.0.27 × 0.5 — where does the decimal point go? (a) 1.35 (b) 0.00135 (c) 0.135 (d) 0.0135
  2. 2.3.7 × 1.8 — where does the decimal point go? (a) 6.66 (b) 0.0666 (c) 0.666 (d) 66.6
  3. 3.6.3 × 19 — where does the decimal point go? (a) 1197 (b) 1.197 (c) 119.7 (d) 11.97
  4. 4.0.92 × 2.2 — where does the decimal point go? (a) 0.2024 (b) 0.02024 (c) 2.024 (d) 20.24
  5. 5.5.9 × 25 — where does the decimal point go? (a) 147.5 (b) 14.75 (c) 1.475 (d) 1475
  6. 6.0.81 × 31 — where does the decimal point go? (a) 25.11 (b) 251.1 (c) 0.2511 (d) 2.511
  7. 7.6.1 × 2 — where does the decimal point go? (a) 122 (b) 0.122 (c) 12.2 (d) 1.22
  8. 8.4.7 × 8 — where does the decimal point go? (a) 37.6 (b) 3.76 (c) 376 (d) 0.376
  9. 9.9.2 × 8 — where does the decimal point go? (a) 736 (b) 73.6 (c) 7.36 (d) 0.736
  10. 10.9.6 × 0.7 — where does the decimal point go? (a) 0.0672 (b) 0.672 (c) 6.72 (d) 67.2
  11. 11.7.1 × 2.7 — where does the decimal point go? (a) 19.17 (b) 191.7 (c) 1.917 (d) 0.1917
  12. 12.3.3 × 0.2 — where does the decimal point go? (a) 6.6 (b) 0.66 (c) 0.0066 (d) 0.066
  13. 13.0.69 × 3 — where does the decimal point go? (a) 2.07 (b) 0.207 (c) 20.7 (d) 0.0207
  14. 14.8.8 × 4 — where does the decimal point go? (a) 352 (b) 0.352 (c) 3.52 (d) 35.2
  15. 15.0.73 × 27 — where does the decimal point go? (a) 1.971 (b) 0.1971 (c) 19.71 (d) 197.1
  16. 16.0.99 × 11 — where does the decimal point go? (a) 1.089 (b) 0.1089 (c) 10.89 (d) 108.9
  17. 17.6.7 × 0.5 — where does the decimal point go? (a) 0.335 (b) 0.0335 (c) 33.5 (d) 3.35
  18. 18.0.33 × 9 — where does the decimal point go? (a) 0.0297 (b) 29.7 (c) 2.97 (d) 0.297
  19. 19.0.74 × 2.8 — where does the decimal point go? (a) 20.72 (b) 2.072 (c) 0.2072 (d) 0.02072
  20. 20.0.82 × 9 — where does the decimal point go? (a) 0.0738 (b) 0.738 (c) 73.8 (d) 7.38
  21. 21.0.29 × 14 — where does the decimal point go? (a) 0.0406 (b) 0.406 (c) 40.6 (d) 4.06
  22. 22.3.2 × 44 — where does the decimal point go? (a) 1.408 (b) 140.8 (c) 1408 (d) 14.08
  23. 23.0.37 × 41 — where does the decimal point go? (a) 1.517 (b) 0.1517 (c) 15.17 (d) 151.7
  24. 24.9.1 × 2.7 — where does the decimal point go? (a) 2.457 (b) 0.2457 (c) 245.7 (d) 24.57
  25. 25.0.83 × 34 — where does the decimal point go? (a) 0.2822 (b) 282.2 (c) 2.822 (d) 28.22
  26. 26.4.4 × 4 — where does the decimal point go? (a) 17.6 (b) 1.76 (c) 176 (d) 0.176
  27. 27.5.1 × 2.7 — where does the decimal point go? (a) 1.377 (b) 13.77 (c) 137.7 (d) 0.1377
  28. 28.2.4 × 0.3 — where does the decimal point go? (a) 0.72 (b) 7.2 (c) 0.0072 (d) 0.072
  29. 29.0.91 × 0.2 — where does the decimal point go? (a) 0.0182 (b) 0.182 (c) 1.82 (d) 0.00182
  30. 30.0.76 × 3 — where does the decimal point go? (a) 22.8 (b) 0.228 (c) 2.28 (d) 0.0228
  31. 31.3.3 × 9 — where does the decimal point go? (a) 0.297 (b) 2.97 (c) 297 (d) 29.7
  32. 32.6.4 × 44 — where does the decimal point go? (a) 2.816 (b) 281.6 (c) 28.16 (d) 2816
  33. 33.1.9 × 36 — where does the decimal point go? (a) 6.84 (b) 68.4 (c) 684 (d) 0.684
  34. 34.1.4 × 2 — where does the decimal point go? (a) 2.8 (b) 0.028 (c) 0.28 (d) 28
  35. 35.8.9 × 45 — where does the decimal point go? (a) 4005 (b) 4.005 (c) 40.05 (d) 400.5
  36. 36.0.98 × 8 — where does the decimal point go? (a) 0.0784 (b) 78.4 (c) 7.84 (d) 0.784
  37. 37.0.38 × 4 — where does the decimal point go? (a) 0.152 (b) 1.52 (c) 15.2 (d) 0.0152
  38. 38.3.2 × 0.7 — where does the decimal point go? (a) 0.0224 (b) 22.4 (c) 2.24 (d) 0.224
  39. 39.0.42 × 47 — where does the decimal point go? (a) 1.974 (b) 197.4 (c) 19.74 (d) 0.1974
  40. 40.9.7 × 12 — where does the decimal point go? (a) 116.4 (b) 1.164 (c) 11.64 (d) 1164

Answer key

  1. 0.135
  2. 6.66
  3. 119.7
  4. 2.024
  5. 147.5
  6. 25.11
  7. 12.2
  8. 37.6
  9. 73.6
  10. 6.72
  11. 19.17
  12. 0.66
  13. 2.07
  14. 35.2
  15. 19.71
  16. 10.89
  17. 3.35
  18. 2.97
  19. 2.072
  20. 7.38
  21. 4.06
  22. 140.8
  23. 15.17
  24. 24.57
  25. 28.22
  26. 17.6
  27. 13.77
  28. 0.72
  29. 0.182
  30. 2.28
  31. 29.7
  32. 281.6
  33. 68.4
  34. 2.8
  35. 400.5
  36. 7.84
  37. 1.52
  38. 2.24
  39. 19.74
  40. 116.4

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