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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 804 · 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. 1.6.7 × 0.9 — where does the decimal point go? (a) 0.603 (b) 6.03 (c) 0.0603 (d) 60.3
  2. 2.0.81 × 3 — where does the decimal point go? (a) 0.0243 (b) 24.3 (c) 2.43 (d) 0.243
  3. 3.6.7 × 47 — where does the decimal point go? (a) 31.49 (b) 3.149 (c) 314.9 (d) 3149
  4. 4.8.6 × 2 — where does the decimal point go? (a) 17.2 (b) 1.72 (c) 172 (d) 0.172
  5. 5.0.16 × 3.7 — where does the decimal point go? (a) 0.592 (b) 0.0592 (c) 0.00592 (d) 5.92
  6. 6.0.77 × 3.3 — where does the decimal point go? (a) 0.02541 (b) 0.2541 (c) 2.541 (d) 25.41
  7. 7.0.82 × 17 — where does the decimal point go? (a) 13.94 (b) 139.4 (c) 1.394 (d) 0.1394
  8. 8.0.33 × 18 — where does the decimal point go? (a) 0.0594 (b) 0.594 (c) 59.4 (d) 5.94
  9. 9.0.85 × 0.7 — where does the decimal point go? (a) 0.00595 (b) 0.0595 (c) 0.595 (d) 5.95
  10. 10.0.57 × 12 — where does the decimal point go? (a) 0.0684 (b) 0.684 (c) 68.4 (d) 6.84
  11. 11.0.59 × 2.7 — where does the decimal point go? (a) 0.1593 (b) 0.01593 (c) 15.93 (d) 1.593
  12. 12.5.2 × 2 — where does the decimal point go? (a) 10.4 (b) 1.04 (c) 0.104 (d) 104
  13. 13.0.53 × 2 — where does the decimal point go? (a) 10.6 (b) 0.0106 (c) 0.106 (d) 1.06
  14. 14.0.99 × 2.4 — where does the decimal point go? (a) 0.02376 (b) 0.2376 (c) 2.376 (d) 23.76
  15. 15.1.6 × 8 — where does the decimal point go? (a) 0.128 (b) 128 (c) 12.8 (d) 1.28
  16. 16.4.2 × 8 — where does the decimal point go? (a) 33.6 (b) 336 (c) 3.36 (d) 0.336
  17. 17.0.86 × 0.6 — where does the decimal point go? (a) 0.00516 (b) 0.516 (c) 5.16 (d) 0.0516
  18. 18.1.4 × 9 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 126 (d) 0.126
  19. 19.1.3 × 1.4 — where does the decimal point go? (a) 1.82 (b) 18.2 (c) 0.0182 (d) 0.182
  20. 20.6.1 × 4.6 — where does the decimal point go? (a) 2.806 (b) 28.06 (c) 0.2806 (d) 280.6
  21. 21.0.44 × 1.9 — where does the decimal point go? (a) 8.36 (b) 0.0836 (c) 0.836 (d) 0.00836
  22. 22.0.12 × 0.3 — where does the decimal point go? (a) 0.0036 (b) 0.00036 (c) 0.036 (d) 0.36
  23. 23.1.7 × 3 — where does the decimal point go? (a) 0.051 (b) 5.1 (c) 0.51 (d) 51
  24. 24.0.93 × 4.1 — where does the decimal point go? (a) 38.13 (b) 0.03813 (c) 0.3813 (d) 3.813
  25. 25.0.68 × 4 — where does the decimal point go? (a) 2.72 (b) 0.0272 (c) 27.2 (d) 0.272
  26. 26.8.2 × 41 — where does the decimal point go? (a) 3362 (b) 3.362 (c) 336.2 (d) 33.62
  27. 27.0.52 × 4 — where does the decimal point go? (a) 0.0208 (b) 0.208 (c) 20.8 (d) 2.08
  28. 28.0.26 × 2.8 — where does the decimal point go? (a) 0.728 (b) 0.00728 (c) 0.0728 (d) 7.28
  29. 29.1.8 × 4 — where does the decimal point go? (a) 72 (b) 7.2 (c) 0.072 (d) 0.72
  30. 30.0.78 × 9 — where does the decimal point go? (a) 0.702 (b) 70.2 (c) 7.02 (d) 0.0702
  31. 31.2.2 × 7 — where does the decimal point go? (a) 15.4 (b) 1.54 (c) 154 (d) 0.154
  32. 32.3.6 × 2.6 — where does the decimal point go? (a) 0.0936 (b) 93.6 (c) 0.936 (d) 9.36
  33. 33.0.55 × 0.5 — where does the decimal point go? (a) 0.275 (b) 0.0275 (c) 0.00275 (d) 2.75
  34. 34.0.12 × 3 — where does the decimal point go? (a) 0.0036 (b) 3.6 (c) 0.036 (d) 0.36
  35. 35.9.1 × 0.5 — where does the decimal point go? (a) 45.5 (b) 4.55 (c) 0.0455 (d) 0.455
  36. 36.3.2 × 0.9 — where does the decimal point go? (a) 0.288 (b) 28.8 (c) 2.88 (d) 0.0288
  37. 37.2.3 × 0.9 — where does the decimal point go? (a) 20.7 (b) 2.07 (c) 0.207 (d) 0.0207
  38. 38.0.48 × 3.7 — where does the decimal point go? (a) 1.776 (b) 0.01776 (c) 0.1776 (d) 17.76
  39. 39.0.38 × 9 — where does the decimal point go? (a) 0.342 (b) 3.42 (c) 0.0342 (d) 34.2
  40. 40.0.21 × 9 — where does the decimal point go? (a) 1.89 (b) 0.189 (c) 0.0189 (d) 18.9

Answer key

  1. 6.03
  2. 2.43
  3. 314.9
  4. 17.2
  5. 0.592
  6. 2.541
  7. 13.94
  8. 5.94
  9. 0.595
  10. 6.84
  11. 1.593
  12. 10.4
  13. 1.06
  14. 2.376
  15. 12.8
  16. 33.6
  17. 0.516
  18. 12.6
  19. 1.82
  20. 28.06
  21. 0.836
  22. 0.036
  23. 5.1
  24. 3.813
  25. 2.72
  26. 336.2
  27. 2.08
  28. 0.728
  29. 7.2
  30. 7.02
  31. 15.4
  32. 9.36
  33. 0.275
  34. 0.36
  35. 4.55
  36. 2.88
  37. 2.07
  38. 1.776
  39. 3.42
  40. 1.89

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