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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 268 · 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. 1.1.3 × 2 — where does the decimal point go? (a) 2.6 (b) 26 (c) 0.26 (d) 0.026
  2. 2.0.56 × 3.7 — where does the decimal point go? (a) 0.02072 (b) 2.072 (c) 0.2072 (d) 20.72
  3. 3.5.9 × 5 — where does the decimal point go? (a) 2.95 (b) 295 (c) 29.5 (d) 0.295
  4. 4.0.32 × 0.3 — where does the decimal point go? (a) 0.00096 (b) 0.96 (c) 0.096 (d) 0.0096
  5. 5.2.4 × 3 — where does the decimal point go? (a) 72 (b) 0.072 (c) 0.72 (d) 7.2
  6. 6.0.35 × 0.9 — where does the decimal point go? (a) 3.15 (b) 0.0315 (c) 0.00315 (d) 0.315
  7. 7.0.94 × 6 — where does the decimal point go? (a) 0.564 (b) 0.0564 (c) 5.64 (d) 56.4
  8. 8.0.83 × 5 — where does the decimal point go? (a) 4.15 (b) 41.5 (c) 0.415 (d) 0.0415
  9. 9.0.63 × 0.4 — where does the decimal point go? (a) 0.0252 (b) 0.252 (c) 2.52 (d) 0.00252
  10. 10.6.1 × 6 — where does the decimal point go? (a) 366 (b) 3.66 (c) 36.6 (d) 0.366
  11. 11.1.2 × 2 — where does the decimal point go? (a) 24 (b) 0.024 (c) 2.4 (d) 0.24
  12. 12.0.25 × 25 — where does the decimal point go? (a) 62.5 (b) 6.25 (c) 0.0625 (d) 0.625
  13. 13.6.9 × 0.3 — where does the decimal point go? (a) 2.07 (b) 0.207 (c) 20.7 (d) 0.0207
  14. 14.7.5 × 13 — where does the decimal point go? (a) 9.75 (b) 0.975 (c) 975 (d) 97.5
  15. 15.5.9 × 1.1 — where does the decimal point go? (a) 0.0649 (b) 64.9 (c) 0.649 (d) 6.49
  16. 16.4.9 × 8 — where does the decimal point go? (a) 39.2 (b) 3.92 (c) 0.392 (d) 392
  17. 17.2.2 × 7 — where does the decimal point go? (a) 0.154 (b) 1.54 (c) 154 (d) 15.4
  18. 18.9.8 × 4.6 — where does the decimal point go? (a) 0.4508 (b) 450.8 (c) 45.08 (d) 4.508
  19. 19.8.3 × 15 — where does the decimal point go? (a) 1245 (b) 124.5 (c) 1.245 (d) 12.45
  20. 20.0.59 × 0.9 — where does the decimal point go? (a) 5.31 (b) 0.531 (c) 0.00531 (d) 0.0531
  21. 21.7.8 × 0.8 — where does the decimal point go? (a) 0.624 (b) 6.24 (c) 62.4 (d) 0.0624
  22. 22.0.19 × 0.5 — where does the decimal point go? (a) 0.00095 (b) 0.0095 (c) 0.095 (d) 0.95
  23. 23.0.68 × 2.2 — where does the decimal point go? (a) 1.496 (b) 0.01496 (c) 14.96 (d) 0.1496
  24. 24.6.4 × 46 — where does the decimal point go? (a) 2944 (b) 29.44 (c) 2.944 (d) 294.4
  25. 25.0.23 × 4.1 — where does the decimal point go? (a) 0.00943 (b) 0.943 (c) 9.43 (d) 0.0943
  26. 26.4.8 × 4 — where does the decimal point go? (a) 1.92 (b) 19.2 (c) 0.192 (d) 192
  27. 27.0.67 × 3 — where does the decimal point go? (a) 2.01 (b) 0.0201 (c) 0.201 (d) 20.1
  28. 28.0.48 × 29 — where does the decimal point go? (a) 13.92 (b) 0.1392 (c) 1.392 (d) 139.2
  29. 29.0.44 × 4.7 — where does the decimal point go? (a) 2.068 (b) 20.68 (c) 0.02068 (d) 0.2068
  30. 30.6.9 × 5 — where does the decimal point go? (a) 3.45 (b) 345 (c) 0.345 (d) 34.5
  31. 31.3.7 × 13 — where does the decimal point go? (a) 481 (b) 0.481 (c) 4.81 (d) 48.1
  32. 32.0.81 × 1.6 — where does the decimal point go? (a) 0.01296 (b) 12.96 (c) 0.1296 (d) 1.296
  33. 33.3.9 × 48 — where does the decimal point go? (a) 1872 (b) 18.72 (c) 1.872 (d) 187.2
  34. 34.1.7 × 3.3 — where does the decimal point go? (a) 56.1 (b) 0.561 (c) 5.61 (d) 0.0561
  35. 35.4.7 × 4 — where does the decimal point go? (a) 1.88 (b) 188 (c) 0.188 (d) 18.8
  36. 36.7.1 × 0.7 — where does the decimal point go? (a) 4.97 (b) 0.0497 (c) 0.497 (d) 49.7
  37. 37.8.4 × 2.1 — where does the decimal point go? (a) 0.1764 (b) 176.4 (c) 17.64 (d) 1.764
  38. 38.0.19 × 9 — where does the decimal point go? (a) 0.0171 (b) 0.171 (c) 17.1 (d) 1.71
  39. 39.3.4 × 0.3 — where does the decimal point go? (a) 10.2 (b) 1.02 (c) 0.102 (d) 0.0102
  40. 40.0.85 × 3.7 — where does the decimal point go? (a) 3.145 (b) 31.45 (c) 0.3145 (d) 0.03145

Answer key

  1. 2.6
  2. 2.072
  3. 29.5
  4. 0.096
  5. 7.2
  6. 0.315
  7. 5.64
  8. 4.15
  9. 0.252
  10. 36.6
  11. 2.4
  12. 6.25
  13. 2.07
  14. 97.5
  15. 6.49
  16. 39.2
  17. 15.4
  18. 45.08
  19. 124.5
  20. 0.531
  21. 6.24
  22. 0.095
  23. 1.496
  24. 294.4
  25. 0.943
  26. 19.2
  27. 2.01
  28. 13.92
  29. 2.068
  30. 34.5
  31. 48.1
  32. 1.296
  33. 187.2
  34. 5.61
  35. 18.8
  36. 4.97
  37. 17.64
  38. 1.71
  39. 1.02
  40. 3.145

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