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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 8 · 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. 1.4.3 × 0.8 — where does the decimal point go? (a) 0.344 (b) 34.4 (c) 0.0344 (d) 3.44
  2. 2.3.5 × 7 — where does the decimal point go? (a) 24.5 (b) 2.45 (c) 0.245 (d) 245
  3. 3.6.7 × 8 — where does the decimal point go? (a) 53.6 (b) 0.536 (c) 5.36 (d) 536
  4. 4.0.66 × 1.1 — where does the decimal point go? (a) 0.726 (b) 0.00726 (c) 7.26 (d) 0.0726
  5. 5.9.3 × 0.2 — where does the decimal point go? (a) 18.6 (b) 0.0186 (c) 1.86 (d) 0.186
  6. 6.2.8 × 4 — where does the decimal point go? (a) 1.12 (b) 112 (c) 0.112 (d) 11.2
  7. 7.0.84 × 4 — where does the decimal point go? (a) 0.0336 (b) 0.336 (c) 3.36 (d) 33.6
  8. 8.9.6 × 0.3 — where does the decimal point go? (a) 0.0288 (b) 2.88 (c) 28.8 (d) 0.288
  9. 9.0.91 × 0.8 — where does the decimal point go? (a) 0.728 (b) 0.0728 (c) 0.00728 (d) 7.28
  10. 10.6.9 × 3 — where does the decimal point go? (a) 20.7 (b) 207 (c) 2.07 (d) 0.207
  11. 11.2.6 × 3.2 — where does the decimal point go? (a) 83.2 (b) 0.832 (c) 0.0832 (d) 8.32
  12. 12.4.4 × 1.3 — where does the decimal point go? (a) 5.72 (b) 0.572 (c) 0.0572 (d) 57.2
  13. 13.6.9 × 7 — where does the decimal point go? (a) 483 (b) 0.483 (c) 48.3 (d) 4.83
  14. 14.3.1 × 0.8 — where does the decimal point go? (a) 0.248 (b) 24.8 (c) 0.0248 (d) 2.48
  15. 15.8.7 × 8 — where does the decimal point go? (a) 0.696 (b) 696 (c) 69.6 (d) 6.96
  16. 16.9.3 × 14 — where does the decimal point go? (a) 1.302 (b) 1302 (c) 130.2 (d) 13.02
  17. 17.0.36 × 4 — where does the decimal point go? (a) 0.0144 (b) 0.144 (c) 14.4 (d) 1.44
  18. 18.1.4 × 3.3 — where does the decimal point go? (a) 46.2 (b) 0.462 (c) 4.62 (d) 0.0462
  19. 19.0.44 × 2.4 — where does the decimal point go? (a) 0.1056 (b) 0.01056 (c) 1.056 (d) 10.56
  20. 20.9.8 × 29 — where does the decimal point go? (a) 2842 (b) 284.2 (c) 28.42 (d) 2.842
  21. 21.3.2 × 6 — where does the decimal point go? (a) 19.2 (b) 1.92 (c) 192 (d) 0.192
  22. 22.0.93 × 7 — where does the decimal point go? (a) 6.51 (b) 0.0651 (c) 65.1 (d) 0.651
  23. 23.5.1 × 3 — where does the decimal point go? (a) 15.3 (b) 153 (c) 1.53 (d) 0.153
  24. 24.0.67 × 3.1 — where does the decimal point go? (a) 20.77 (b) 2.077 (c) 0.02077 (d) 0.2077
  25. 25.2.9 × 3 — where does the decimal point go? (a) 0.87 (b) 8.7 (c) 0.087 (d) 87
  26. 26.1.6 × 4 — where does the decimal point go? (a) 0.064 (b) 64 (c) 0.64 (d) 6.4
  27. 27.0.45 × 9 — where does the decimal point go? (a) 4.05 (b) 0.405 (c) 0.0405 (d) 40.5
  28. 28.1.2 × 3 — where does the decimal point go? (a) 3.6 (b) 36 (c) 0.36 (d) 0.036
  29. 29.1.4 × 4 — where does the decimal point go? (a) 0.56 (b) 0.056 (c) 56 (d) 5.6
  30. 30.0.14 × 1.7 — where does the decimal point go? (a) 0.0238 (b) 0.238 (c) 0.00238 (d) 2.38
  31. 31.9.2 × 4 — where does the decimal point go? (a) 368 (b) 36.8 (c) 0.368 (d) 3.68
  32. 32.3.4 × 13 — where does the decimal point go? (a) 44.2 (b) 4.42 (c) 442 (d) 0.442
  33. 33.8.6 × 4.2 — where does the decimal point go? (a) 3.612 (b) 36.12 (c) 361.2 (d) 0.3612
  34. 34.6.5 × 3 — where does the decimal point go? (a) 19.5 (b) 195 (c) 1.95 (d) 0.195
  35. 35.0.85 × 3 — where does the decimal point go? (a) 25.5 (b) 0.255 (c) 0.0255 (d) 2.55
  36. 36.2.3 × 8 — where does the decimal point go? (a) 184 (b) 18.4 (c) 1.84 (d) 0.184
  37. 37.9.5 × 0.7 — where does the decimal point go? (a) 0.665 (b) 6.65 (c) 66.5 (d) 0.0665
  38. 38.3.7 × 0.6 — where does the decimal point go? (a) 22.2 (b) 0.222 (c) 2.22 (d) 0.0222
  39. 39.0.88 × 4.2 — where does the decimal point go? (a) 36.96 (b) 0.3696 (c) 3.696 (d) 0.03696
  40. 40.1.8 × 4 — where does the decimal point go? (a) 7.2 (b) 0.72 (c) 72 (d) 0.072

Answer key

  1. 3.44
  2. 24.5
  3. 53.6
  4. 0.726
  5. 1.86
  6. 11.2
  7. 3.36
  8. 2.88
  9. 0.728
  10. 20.7
  11. 8.32
  12. 5.72
  13. 48.3
  14. 2.48
  15. 69.6
  16. 130.2
  17. 1.44
  18. 4.62
  19. 1.056
  20. 284.2
  21. 19.2
  22. 6.51
  23. 15.3
  24. 2.077
  25. 8.7
  26. 6.4
  27. 4.05
  28. 3.6
  29. 5.6
  30. 0.238
  31. 36.8
  32. 44.2
  33. 36.12
  34. 19.5
  35. 2.55
  36. 18.4
  37. 6.65
  38. 2.22
  39. 3.696
  40. 7.2

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