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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 3 · 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. 1.0.68 × 41 — where does the decimal point go? (a) 278.8 (b) 27.88 (c) 0.2788 (d) 2.788
  2. 2.3.2 × 19 — where does the decimal point go? (a) 0.608 (b) 6.08 (c) 60.8 (d) 608
  3. 3.5.7 × 6 — where does the decimal point go? (a) 342 (b) 34.2 (c) 3.42 (d) 0.342
  4. 4.0.59 × 38 — where does the decimal point go? (a) 224.2 (b) 0.2242 (c) 22.42 (d) 2.242
  5. 5.7.7 × 0.6 — where does the decimal point go? (a) 0.462 (b) 4.62 (c) 46.2 (d) 0.0462
  6. 6.0.27 × 1.8 — where does the decimal point go? (a) 0.0486 (b) 4.86 (c) 0.00486 (d) 0.486
  7. 7.0.67 × 2.4 — where does the decimal point go? (a) 16.08 (b) 0.01608 (c) 0.1608 (d) 1.608
  8. 8.8.9 × 12 — where does the decimal point go? (a) 1.068 (b) 106.8 (c) 10.68 (d) 1068
  9. 9.0.34 × 0.2 — where does the decimal point go? (a) 0.068 (b) 0.0068 (c) 0.68 (d) 0.00068
  10. 10.8.6 × 0.8 — where does the decimal point go? (a) 68.8 (b) 0.0688 (c) 6.88 (d) 0.688
  11. 11.0.44 × 0.4 — where does the decimal point go? (a) 0.0176 (b) 1.76 (c) 0.176 (d) 0.00176
  12. 12.2.1 × 3.6 — where does the decimal point go? (a) 75.6 (b) 0.756 (c) 7.56 (d) 0.0756
  13. 13.9.6 × 3 — where does the decimal point go? (a) 288 (b) 2.88 (c) 0.288 (d) 28.8
  14. 14.1.3 × 0.9 — where does the decimal point go? (a) 11.7 (b) 0.117 (c) 0.0117 (d) 1.17
  15. 15.4.1 × 0.9 — where does the decimal point go? (a) 0.369 (b) 0.0369 (c) 36.9 (d) 3.69
  16. 16.3.1 × 4 — where does the decimal point go? (a) 1.24 (b) 12.4 (c) 0.124 (d) 124
  17. 17.0.56 × 2.2 — where does the decimal point go? (a) 1.232 (b) 0.01232 (c) 12.32 (d) 0.1232
  18. 18.0.59 × 6 — where does the decimal point go? (a) 35.4 (b) 3.54 (c) 0.0354 (d) 0.354
  19. 19.0.62 × 28 — where does the decimal point go? (a) 0.1736 (b) 1.736 (c) 17.36 (d) 173.6
  20. 20.0.21 × 0.4 — where does the decimal point go? (a) 0.84 (b) 0.00084 (c) 0.084 (d) 0.0084
  21. 21.7.5 × 3 — where does the decimal point go? (a) 225 (b) 22.5 (c) 2.25 (d) 0.225
  22. 22.0.52 × 0.9 — where does the decimal point go? (a) 0.0468 (b) 0.00468 (c) 4.68 (d) 0.468
  23. 23.4.7 × 4.5 — where does the decimal point go? (a) 2.115 (b) 21.15 (c) 0.2115 (d) 211.5
  24. 24.0.53 × 0.7 — where does the decimal point go? (a) 0.00371 (b) 0.371 (c) 0.0371 (d) 3.71
  25. 25.0.61 × 6 — where does the decimal point go? (a) 0.366 (b) 3.66 (c) 36.6 (d) 0.0366
  26. 26.1.7 × 1.7 — where does the decimal point go? (a) 0.0289 (b) 28.9 (c) 0.289 (d) 2.89
  27. 27.5.2 × 9 — where does the decimal point go? (a) 468 (b) 46.8 (c) 0.468 (d) 4.68
  28. 28.5.8 × 4 — where does the decimal point go? (a) 2.32 (b) 0.232 (c) 23.2 (d) 232
  29. 29.6.2 × 39 — where does the decimal point go? (a) 241.8 (b) 2.418 (c) 24.18 (d) 2418
  30. 30.3.9 × 0.3 — where does the decimal point go? (a) 11.7 (b) 1.17 (c) 0.0117 (d) 0.117
  31. 31.0.35 × 0.7 — where does the decimal point go? (a) 0.245 (b) 2.45 (c) 0.0245 (d) 0.00245
  32. 32.3.9 × 1.6 — where does the decimal point go? (a) 0.624 (b) 6.24 (c) 62.4 (d) 0.0624
  33. 33.0.69 × 1.2 — where does the decimal point go? (a) 0.828 (b) 0.00828 (c) 8.28 (d) 0.0828
  34. 34.0.18 × 0.2 — where does the decimal point go? (a) 0.0036 (b) 0.00036 (c) 0.036 (d) 0.36
  35. 35.8.3 × 0.6 — where does the decimal point go? (a) 4.98 (b) 0.0498 (c) 0.498 (d) 49.8
  36. 36.0.68 × 0.7 — where does the decimal point go? (a) 0.0476 (b) 0.00476 (c) 0.476 (d) 4.76
  37. 37.0.94 × 3.8 — where does the decimal point go? (a) 35.72 (b) 3.572 (c) 0.3572 (d) 0.03572
  38. 38.7.6 × 1.9 — where does the decimal point go? (a) 14.44 (b) 144.4 (c) 1.444 (d) 0.1444
  39. 39.1.2 × 1.3 — where does the decimal point go? (a) 0.0156 (b) 15.6 (c) 0.156 (d) 1.56
  40. 40.1.4 × 0.7 — where does the decimal point go? (a) 0.98 (b) 0.0098 (c) 0.098 (d) 9.8

Answer key

  1. 27.88
  2. 60.8
  3. 34.2
  4. 22.42
  5. 4.62
  6. 0.486
  7. 1.608
  8. 106.8
  9. 0.068
  10. 6.88
  11. 0.176
  12. 7.56
  13. 28.8
  14. 1.17
  15. 3.69
  16. 12.4
  17. 1.232
  18. 3.54
  19. 17.36
  20. 0.084
  21. 22.5
  22. 0.468
  23. 21.15
  24. 0.371
  25. 3.66
  26. 2.89
  27. 46.8
  28. 23.2
  29. 241.8
  30. 1.17
  31. 0.245
  32. 6.24
  33. 0.828
  34. 0.036
  35. 4.98
  36. 0.476
  37. 3.572
  38. 14.44
  39. 1.56
  40. 0.98

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