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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 342 · 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. 1.8.6 × 0.3 — where does the decimal point go? (a) 0.258 (b) 2.58 (c) 0.0258 (d) 25.8
  2. 2.9.3 × 31 — where does the decimal point go? (a) 28.83 (b) 2.883 (c) 2883 (d) 288.3
  3. 3.0.22 × 0.6 — where does the decimal point go? (a) 0.132 (b) 0.00132 (c) 1.32 (d) 0.0132
  4. 4.0.83 × 8 — where does the decimal point go? (a) 66.4 (b) 6.64 (c) 0.664 (d) 0.0664
  5. 5.5.6 × 2.1 — where does the decimal point go? (a) 117.6 (b) 11.76 (c) 1.176 (d) 0.1176
  6. 6.0.78 × 0.8 — where does the decimal point go? (a) 0.0624 (b) 0.00624 (c) 0.624 (d) 6.24
  7. 7.4.8 × 3 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 144 (d) 14.4
  8. 8.0.57 × 3.7 — where does the decimal point go? (a) 0.2109 (b) 0.02109 (c) 21.09 (d) 2.109
  9. 9.0.78 × 0.7 — where does the decimal point go? (a) 0.546 (b) 0.0546 (c) 5.46 (d) 0.00546
  10. 10.1.2 × 6 — where does the decimal point go? (a) 7.2 (b) 0.72 (c) 0.072 (d) 72
  11. 11.6.7 × 14 — where does the decimal point go? (a) 0.938 (b) 9.38 (c) 93.8 (d) 938
  12. 12.3.1 × 2.5 — where does the decimal point go? (a) 0.775 (b) 0.0775 (c) 7.75 (d) 77.5
  13. 13.8.1 × 36 — where does the decimal point go? (a) 2.916 (b) 2916 (c) 29.16 (d) 291.6
  14. 14.0.62 × 3 — where does the decimal point go? (a) 1.86 (b) 0.186 (c) 0.0186 (d) 18.6
  15. 15.0.98 × 2.8 — where does the decimal point go? (a) 27.44 (b) 0.2744 (c) 2.744 (d) 0.02744
  16. 16.0.17 × 2 — where does the decimal point go? (a) 3.4 (b) 0.034 (c) 0.34 (d) 0.0034
  17. 17.0.99 × 4 — where does the decimal point go? (a) 0.0396 (b) 0.396 (c) 39.6 (d) 3.96
  18. 18.0.57 × 9 — where does the decimal point go? (a) 0.513 (b) 0.0513 (c) 51.3 (d) 5.13
  19. 19.0.63 × 4.7 — where does the decimal point go? (a) 2.961 (b) 0.02961 (c) 0.2961 (d) 29.61
  20. 20.8.4 × 1.1 — where does the decimal point go? (a) 0.924 (b) 92.4 (c) 0.0924 (d) 9.24
  21. 21.0.49 × 2 — where does the decimal point go? (a) 9.8 (b) 0.098 (c) 0.0098 (d) 0.98
  22. 22.5.1 × 7 — where does the decimal point go? (a) 35.7 (b) 0.357 (c) 357 (d) 3.57
  23. 23.3.1 × 41 — where does the decimal point go? (a) 1.271 (b) 127.1 (c) 12.71 (d) 1271
  24. 24.0.53 × 8 — where does the decimal point go? (a) 0.0424 (b) 0.424 (c) 42.4 (d) 4.24
  25. 25.2.3 × 0.4 — where does the decimal point go? (a) 0.0092 (b) 0.092 (c) 9.2 (d) 0.92
  26. 26.0.94 × 18 — where does the decimal point go? (a) 16.92 (b) 0.1692 (c) 169.2 (d) 1.692
  27. 27.0.81 × 0.3 — where does the decimal point go? (a) 0.0243 (b) 0.243 (c) 2.43 (d) 0.00243
  28. 28.7.4 × 3 — where does the decimal point go? (a) 22.2 (b) 222 (c) 2.22 (d) 0.222
  29. 29.0.13 × 1.6 — where does the decimal point go? (a) 0.0208 (b) 0.208 (c) 2.08 (d) 0.00208
  30. 30.4.9 × 9 — where does the decimal point go? (a) 4.41 (b) 0.441 (c) 44.1 (d) 441
  31. 31.0.42 × 3.4 — where does the decimal point go? (a) 14.28 (b) 0.1428 (c) 1.428 (d) 0.01428
  32. 32.8.7 × 27 — where does the decimal point go? (a) 23.49 (b) 2.349 (c) 234.9 (d) 2349
  33. 33.0.53 × 2.3 — where does the decimal point go? (a) 12.19 (b) 1.219 (c) 0.01219 (d) 0.1219
  34. 34.2.5 × 4.1 — where does the decimal point go? (a) 102.5 (b) 0.1025 (c) 1.025 (d) 10.25
  35. 35.0.83 × 4 — where does the decimal point go? (a) 33.2 (b) 0.0332 (c) 0.332 (d) 3.32
  36. 36.0.26 × 3.7 — where does the decimal point go? (a) 9.62 (b) 0.962 (c) 0.0962 (d) 0.00962
  37. 37.9.5 × 9 — where does the decimal point go? (a) 8.55 (b) 855 (c) 85.5 (d) 0.855
  38. 38.0.93 × 4.3 — where does the decimal point go? (a) 0.03999 (b) 39.99 (c) 3.999 (d) 0.3999
  39. 39.0.29 × 3.3 — where does the decimal point go? (a) 0.0957 (b) 0.957 (c) 0.00957 (d) 9.57
  40. 40.1.3 × 2.3 — where does the decimal point go? (a) 0.0299 (b) 29.9 (c) 0.299 (d) 2.99

Answer key

  1. 2.58
  2. 288.3
  3. 0.132
  4. 6.64
  5. 11.76
  6. 0.624
  7. 14.4
  8. 2.109
  9. 0.546
  10. 7.2
  11. 93.8
  12. 7.75
  13. 291.6
  14. 1.86
  15. 2.744
  16. 0.34
  17. 3.96
  18. 5.13
  19. 2.961
  20. 9.24
  21. 0.98
  22. 35.7
  23. 127.1
  24. 4.24
  25. 0.92
  26. 16.92
  27. 0.243
  28. 22.2
  29. 0.208
  30. 44.1
  31. 1.428
  32. 234.9
  33. 1.219
  34. 10.25
  35. 3.32
  36. 0.962
  37. 85.5
  38. 3.999
  39. 0.957
  40. 2.99

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