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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 665 · 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. 1.6.8 × 0.7 — where does the decimal point go? (a) 47.6 (b) 0.476 (c) 0.0476 (d) 4.76
  2. 2.0.28 × 7 — where does the decimal point go? (a) 0.196 (b) 19.6 (c) 1.96 (d) 0.0196
  3. 3.0.53 × 4 — where does the decimal point go? (a) 0.212 (b) 0.0212 (c) 21.2 (d) 2.12
  4. 4.9.9 × 12 — where does the decimal point go? (a) 1188 (b) 1.188 (c) 11.88 (d) 118.8
  5. 5.1.9 × 2 — where does the decimal point go? (a) 0.38 (b) 3.8 (c) 0.038 (d) 38
  6. 6.9.3 × 8 — where does the decimal point go? (a) 74.4 (b) 0.744 (c) 7.44 (d) 744
  7. 7.3.3 × 0.6 — where does the decimal point go? (a) 1.98 (b) 19.8 (c) 0.198 (d) 0.0198
  8. 8.0.78 × 31 — where does the decimal point go? (a) 0.2418 (b) 24.18 (c) 2.418 (d) 241.8
  9. 9.0.77 × 0.6 — where does the decimal point go? (a) 0.462 (b) 0.00462 (c) 0.0462 (d) 4.62
  10. 10.3.6 × 39 — where does the decimal point go? (a) 140.4 (b) 1404 (c) 1.404 (d) 14.04
  11. 11.0.24 × 1.7 — where does the decimal point go? (a) 0.0408 (b) 0.00408 (c) 4.08 (d) 0.408
  12. 12.8.9 × 22 — where does the decimal point go? (a) 1.958 (b) 19.58 (c) 195.8 (d) 1958
  13. 13.0.67 × 0.3 — where does the decimal point go? (a) 0.201 (b) 0.00201 (c) 2.01 (d) 0.0201
  14. 14.3.6 × 1.3 — where does the decimal point go? (a) 4.68 (b) 0.468 (c) 0.0468 (d) 46.8
  15. 15.0.19 × 35 — where does the decimal point go? (a) 6.65 (b) 66.5 (c) 0.665 (d) 0.0665
  16. 16.0.22 × 0.2 — where does the decimal point go? (a) 0.0044 (b) 0.044 (c) 0.00044 (d) 0.44
  17. 17.2.4 × 4.8 — where does the decimal point go? (a) 1.152 (b) 115.2 (c) 11.52 (d) 0.1152
  18. 18.5.1 × 0.4 — where does the decimal point go? (a) 20.4 (b) 0.204 (c) 0.0204 (d) 2.04
  19. 19.9.4 × 2 — where does the decimal point go? (a) 1.88 (b) 0.188 (c) 18.8 (d) 188
  20. 20.0.96 × 3 — where does the decimal point go? (a) 28.8 (b) 0.288 (c) 2.88 (d) 0.0288
  21. 21.0.41 × 2 — where does the decimal point go? (a) 8.2 (b) 0.0082 (c) 0.082 (d) 0.82
  22. 22.5.3 × 16 — where does the decimal point go? (a) 84.8 (b) 8.48 (c) 0.848 (d) 848
  23. 23.0.84 × 2 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 16.8 (d) 1.68
  24. 24.7.9 × 0.6 — where does the decimal point go? (a) 0.474 (b) 47.4 (c) 0.0474 (d) 4.74
  25. 25.5.4 × 2 — where does the decimal point go? (a) 108 (b) 0.108 (c) 1.08 (d) 10.8
  26. 26.9.1 × 4 — where does the decimal point go? (a) 36.4 (b) 0.364 (c) 364 (d) 3.64
  27. 27.6.8 × 8 — where does the decimal point go? (a) 544 (b) 5.44 (c) 0.544 (d) 54.4
  28. 28.1.4 × 24 — where does the decimal point go? (a) 0.336 (b) 3.36 (c) 33.6 (d) 336
  29. 29.0.32 × 3 — where does the decimal point go? (a) 0.096 (b) 9.6 (c) 0.0096 (d) 0.96
  30. 30.1.3 × 0.7 — where does the decimal point go? (a) 0.0091 (b) 9.1 (c) 0.91 (d) 0.091
  31. 31.0.18 × 2.7 — where does the decimal point go? (a) 0.0486 (b) 0.486 (c) 4.86 (d) 0.00486
  32. 32.6.3 × 6 — where does the decimal point go? (a) 3.78 (b) 37.8 (c) 0.378 (d) 378
  33. 33.6.2 × 39 — where does the decimal point go? (a) 2.418 (b) 24.18 (c) 241.8 (d) 2418
  34. 34.0.76 × 0.8 — where does the decimal point go? (a) 0.0608 (b) 6.08 (c) 0.00608 (d) 0.608
  35. 35.5.4 × 4.4 — where does the decimal point go? (a) 237.6 (b) 0.2376 (c) 23.76 (d) 2.376
  36. 36.0.85 × 3 — where does the decimal point go? (a) 0.255 (b) 0.0255 (c) 25.5 (d) 2.55
  37. 37.1.6 × 8 — where does the decimal point go? (a) 12.8 (b) 0.128 (c) 128 (d) 1.28
  38. 38.8.8 × 9 — where does the decimal point go? (a) 7.92 (b) 0.792 (c) 79.2 (d) 792
  39. 39.5.6 × 3.9 — where does the decimal point go? (a) 0.2184 (b) 21.84 (c) 2.184 (d) 218.4
  40. 40.8.2 × 6 — where does the decimal point go? (a) 49.2 (b) 492 (c) 4.92 (d) 0.492

Answer key

  1. 4.76
  2. 1.96
  3. 2.12
  4. 118.8
  5. 3.8
  6. 74.4
  7. 1.98
  8. 24.18
  9. 0.462
  10. 140.4
  11. 0.408
  12. 195.8
  13. 0.201
  14. 4.68
  15. 6.65
  16. 0.044
  17. 11.52
  18. 2.04
  19. 18.8
  20. 2.88
  21. 0.82
  22. 84.8
  23. 1.68
  24. 4.74
  25. 10.8
  26. 36.4
  27. 54.4
  28. 33.6
  29. 0.96
  30. 0.91
  31. 0.486
  32. 37.8
  33. 241.8
  34. 0.608
  35. 23.76
  36. 2.55
  37. 12.8
  38. 79.2
  39. 21.84
  40. 49.2

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