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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 463 · 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. 1.6.1 × 0.3 — where does the decimal point go? (a) 18.3 (b) 0.0183 (c) 0.183 (d) 1.83
  2. 2.0.67 × 4.3 — where does the decimal point go? (a) 0.2881 (b) 0.02881 (c) 2.881 (d) 28.81
  3. 3.0.17 × 31 — where does the decimal point go? (a) 0.527 (b) 0.0527 (c) 5.27 (d) 52.7
  4. 4.0.47 × 4.2 — where does the decimal point go? (a) 1.974 (b) 19.74 (c) 0.1974 (d) 0.01974
  5. 5.0.27 × 0.3 — where does the decimal point go? (a) 0.81 (b) 0.00081 (c) 0.081 (d) 0.0081
  6. 6.0.27 × 39 — where does the decimal point go? (a) 10.53 (b) 0.1053 (c) 1.053 (d) 105.3
  7. 7.6.7 × 0.9 — where does the decimal point go? (a) 60.3 (b) 6.03 (c) 0.0603 (d) 0.603
  8. 8.0.28 × 3.6 — where does the decimal point go? (a) 0.01008 (b) 1.008 (c) 10.08 (d) 0.1008
  9. 9.0.94 × 2.6 — where does the decimal point go? (a) 24.44 (b) 0.2444 (c) 0.02444 (d) 2.444
  10. 10.7.3 × 8 — where does the decimal point go? (a) 5.84 (b) 584 (c) 0.584 (d) 58.4
  11. 11.8.5 × 41 — where does the decimal point go? (a) 348.5 (b) 3485 (c) 34.85 (d) 3.485
  12. 12.3.4 × 3.1 — where does the decimal point go? (a) 0.1054 (b) 1.054 (c) 105.4 (d) 10.54
  13. 13.2.1 × 28 — where does the decimal point go? (a) 58.8 (b) 0.588 (c) 5.88 (d) 588
  14. 14.4.7 × 5 — where does the decimal point go? (a) 23.5 (b) 0.235 (c) 235 (d) 2.35
  15. 15.7.6 × 36 — where does the decimal point go? (a) 2.736 (b) 273.6 (c) 2736 (d) 27.36
  16. 16.9.1 × 4.4 — where does the decimal point go? (a) 40.04 (b) 400.4 (c) 0.4004 (d) 4.004
  17. 17.7.9 × 0.2 — where does the decimal point go? (a) 0.158 (b) 15.8 (c) 1.58 (d) 0.0158
  18. 18.7.7 × 0.2 — where does the decimal point go? (a) 0.0154 (b) 0.154 (c) 1.54 (d) 15.4
  19. 19.2.8 × 46 — where does the decimal point go? (a) 1.288 (b) 1288 (c) 128.8 (d) 12.88
  20. 20.0.32 × 3 — where does the decimal point go? (a) 9.6 (b) 0.96 (c) 0.096 (d) 0.0096
  21. 21.0.49 × 3 — where does the decimal point go? (a) 1.47 (b) 0.0147 (c) 14.7 (d) 0.147
  22. 22.1.8 × 21 — where does the decimal point go? (a) 3.78 (b) 37.8 (c) 0.378 (d) 378
  23. 23.3.3 × 17 — where does the decimal point go? (a) 0.561 (b) 561 (c) 56.1 (d) 5.61
  24. 24.0.42 × 26 — where does the decimal point go? (a) 10.92 (b) 0.1092 (c) 109.2 (d) 1.092
  25. 25.1.4 × 2.4 — where does the decimal point go? (a) 0.336 (b) 0.0336 (c) 3.36 (d) 33.6
  26. 26.0.34 × 2 — where does the decimal point go? (a) 0.68 (b) 0.0068 (c) 0.068 (d) 6.8
  27. 27.8.6 × 7 — where does the decimal point go? (a) 60.2 (b) 6.02 (c) 602 (d) 0.602
  28. 28.7.3 × 4.6 — where does the decimal point go? (a) 0.3358 (b) 33.58 (c) 3.358 (d) 335.8
  29. 29.6.4 × 0.7 — where does the decimal point go? (a) 0.448 (b) 0.0448 (c) 4.48 (d) 44.8
  30. 30.0.62 × 0.7 — where does the decimal point go? (a) 0.00434 (b) 0.0434 (c) 4.34 (d) 0.434
  31. 31.4.2 × 6 — where does the decimal point go? (a) 0.252 (b) 252 (c) 25.2 (d) 2.52
  32. 32.0.67 × 16 — where does the decimal point go? (a) 0.1072 (b) 10.72 (c) 1.072 (d) 107.2
  33. 33.2.1 × 14 — where does the decimal point go? (a) 0.294 (b) 29.4 (c) 294 (d) 2.94
  34. 34.0.42 × 0.3 — where does the decimal point go? (a) 0.126 (b) 0.00126 (c) 1.26 (d) 0.0126
  35. 35.0.91 × 11 — where does the decimal point go? (a) 100.1 (b) 1.001 (c) 10.01 (d) 0.1001
  36. 36.3.4 × 0.3 — where does the decimal point go? (a) 10.2 (b) 0.102 (c) 0.0102 (d) 1.02
  37. 37.0.23 × 29 — where does the decimal point go? (a) 66.7 (b) 6.67 (c) 0.0667 (d) 0.667
  38. 38.4.1 × 32 — where does the decimal point go? (a) 13.12 (b) 1312 (c) 1.312 (d) 131.2
  39. 39.2.1 × 17 — where does the decimal point go? (a) 357 (b) 35.7 (c) 3.57 (d) 0.357
  40. 40.3.8 × 1.6 — where does the decimal point go? (a) 6.08 (b) 60.8 (c) 0.0608 (d) 0.608

Answer key

  1. 1.83
  2. 2.881
  3. 5.27
  4. 1.974
  5. 0.081
  6. 10.53
  7. 6.03
  8. 1.008
  9. 2.444
  10. 58.4
  11. 348.5
  12. 10.54
  13. 58.8
  14. 23.5
  15. 273.6
  16. 40.04
  17. 1.58
  18. 1.54
  19. 128.8
  20. 0.96
  21. 1.47
  22. 37.8
  23. 56.1
  24. 10.92
  25. 3.36
  26. 0.68
  27. 60.2
  28. 33.58
  29. 4.48
  30. 0.434
  31. 25.2
  32. 10.72
  33. 29.4
  34. 0.126
  35. 10.01
  36. 1.02
  37. 6.67
  38. 131.2
  39. 35.7
  40. 6.08

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