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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 536 · 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. 1.2.1 × 4 — where does the decimal point go? (a) 0.84 (b) 0.084 (c) 8.4 (d) 84
  2. 2.6.4 × 1.1 — where does the decimal point go? (a) 0.0704 (b) 70.4 (c) 7.04 (d) 0.704
  3. 3.0.39 × 0.7 — where does the decimal point go? (a) 0.00273 (b) 2.73 (c) 0.0273 (d) 0.273
  4. 4.0.72 × 0.9 — where does the decimal point go? (a) 0.0648 (b) 0.648 (c) 0.00648 (d) 6.48
  5. 5.0.31 × 6 — where does the decimal point go? (a) 0.0186 (b) 0.186 (c) 18.6 (d) 1.86
  6. 6.0.37 × 2.7 — where does the decimal point go? (a) 0.0999 (b) 0.00999 (c) 0.999 (d) 9.99
  7. 7.5.2 × 21 — where does the decimal point go? (a) 109.2 (b) 1.092 (c) 10.92 (d) 1092
  8. 8.3.4 × 0.6 — where does the decimal point go? (a) 0.204 (b) 0.0204 (c) 2.04 (d) 20.4
  9. 9.0.29 × 0.7 — where does the decimal point go? (a) 2.03 (b) 0.203 (c) 0.0203 (d) 0.00203
  10. 10.0.48 × 0.3 — where does the decimal point go? (a) 0.00144 (b) 0.0144 (c) 0.144 (d) 1.44
  11. 11.2.3 × 0.5 — where does the decimal point go? (a) 0.0115 (b) 0.115 (c) 1.15 (d) 11.5
  12. 12.0.99 × 1.9 — where does the decimal point go? (a) 0.1881 (b) 0.01881 (c) 1.881 (d) 18.81
  13. 13.8.1 × 33 — where does the decimal point go? (a) 267.3 (b) 2.673 (c) 26.73 (d) 2673
  14. 14.0.55 × 19 — where does the decimal point go? (a) 104.5 (b) 0.1045 (c) 10.45 (d) 1.045
  15. 15.0.88 × 2.3 — where does the decimal point go? (a) 20.24 (b) 2.024 (c) 0.2024 (d) 0.02024
  16. 16.0.56 × 0.6 — where does the decimal point go? (a) 0.0336 (b) 0.336 (c) 0.00336 (d) 3.36
  17. 17.4.7 × 22 — where does the decimal point go? (a) 1.034 (b) 10.34 (c) 103.4 (d) 1034
  18. 18.0.72 × 1.7 — where does the decimal point go? (a) 1.224 (b) 0.1224 (c) 0.01224 (d) 12.24
  19. 19.2.3 × 1.7 — where does the decimal point go? (a) 0.391 (b) 0.0391 (c) 39.1 (d) 3.91
  20. 20.2.6 × 22 — where does the decimal point go? (a) 57.2 (b) 0.572 (c) 5.72 (d) 572
  21. 21.7.2 × 0.9 — where does the decimal point go? (a) 6.48 (b) 0.648 (c) 64.8 (d) 0.0648
  22. 22.6.7 × 11 — where does the decimal point go? (a) 0.737 (b) 73.7 (c) 737 (d) 7.37
  23. 23.0.84 × 0.7 — where does the decimal point go? (a) 0.00588 (b) 5.88 (c) 0.0588 (d) 0.588
  24. 24.0.41 × 9 — where does the decimal point go? (a) 0.369 (b) 36.9 (c) 0.0369 (d) 3.69
  25. 25.3.1 × 4 — where does the decimal point go? (a) 1.24 (b) 124 (c) 12.4 (d) 0.124
  26. 26.5.8 × 0.2 — where does the decimal point go? (a) 0.116 (b) 11.6 (c) 1.16 (d) 0.0116
  27. 27.3.6 × 0.7 — where does the decimal point go? (a) 0.0252 (b) 25.2 (c) 0.252 (d) 2.52
  28. 28.0.61 × 3.4 — where does the decimal point go? (a) 20.74 (b) 0.2074 (c) 2.074 (d) 0.02074
  29. 29.0.59 × 3 — where does the decimal point go? (a) 1.77 (b) 0.177 (c) 0.0177 (d) 17.7
  30. 30.0.34 × 0.3 — where does the decimal point go? (a) 0.0102 (b) 1.02 (c) 0.00102 (d) 0.102
  31. 31.7.9 × 5 — where does the decimal point go? (a) 0.395 (b) 3.95 (c) 395 (d) 39.5
  32. 32.4.6 × 33 — where does the decimal point go? (a) 151.8 (b) 1518 (c) 15.18 (d) 1.518
  33. 33.0.23 × 16 — where does the decimal point go? (a) 36.8 (b) 3.68 (c) 0.0368 (d) 0.368
  34. 34.0.83 × 47 — where does the decimal point go? (a) 0.3901 (b) 39.01 (c) 390.1 (d) 3.901
  35. 35.0.87 × 0.3 — where does the decimal point go? (a) 0.00261 (b) 0.261 (c) 0.0261 (d) 2.61
  36. 36.1.9 × 3.7 — where does the decimal point go? (a) 0.0703 (b) 70.3 (c) 7.03 (d) 0.703
  37. 37.8.9 × 0.3 — where does the decimal point go? (a) 0.267 (b) 0.0267 (c) 2.67 (d) 26.7
  38. 38.0.31 × 3 — where does the decimal point go? (a) 0.093 (b) 0.93 (c) 9.3 (d) 0.0093
  39. 39.0.36 × 31 — where does the decimal point go? (a) 111.6 (b) 1.116 (c) 0.1116 (d) 11.16
  40. 40.3.2 × 3 — where does the decimal point go? (a) 0.96 (b) 9.6 (c) 0.096 (d) 96

Answer key

  1. 8.4
  2. 7.04
  3. 0.273
  4. 0.648
  5. 1.86
  6. 0.999
  7. 109.2
  8. 2.04
  9. 0.203
  10. 0.144
  11. 1.15
  12. 1.881
  13. 267.3
  14. 10.45
  15. 2.024
  16. 0.336
  17. 103.4
  18. 1.224
  19. 3.91
  20. 57.2
  21. 6.48
  22. 73.7
  23. 0.588
  24. 3.69
  25. 12.4
  26. 1.16
  27. 2.52
  28. 2.074
  29. 1.77
  30. 0.102
  31. 39.5
  32. 151.8
  33. 3.68
  34. 39.01
  35. 0.261
  36. 7.03
  37. 2.67
  38. 0.93
  39. 11.16
  40. 9.6

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