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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 62 · 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. 1.0.42 × 4.3 — where does the decimal point go? (a) 0.1806 (b) 1.806 (c) 18.06 (d) 0.01806
  2. 2.0.87 × 5 — where does the decimal point go? (a) 4.35 (b) 43.5 (c) 0.435 (d) 0.0435
  3. 3.2.8 × 7 — where does the decimal point go? (a) 19.6 (b) 1.96 (c) 0.196 (d) 196
  4. 4.1.5 × 31 — where does the decimal point go? (a) 465 (b) 46.5 (c) 4.65 (d) 0.465
  5. 5.0.61 × 6 — where does the decimal point go? (a) 3.66 (b) 0.366 (c) 36.6 (d) 0.0366
  6. 6.9.6 × 0.7 — where does the decimal point go? (a) 67.2 (b) 6.72 (c) 0.672 (d) 0.0672
  7. 7.3.3 × 9 — where does the decimal point go? (a) 0.297 (b) 297 (c) 29.7 (d) 2.97
  8. 8.0.32 × 0.3 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 0.096 (d) 0.00096
  9. 9.9.1 × 0.7 — where does the decimal point go? (a) 63.7 (b) 0.637 (c) 6.37 (d) 0.0637
  10. 10.0.45 × 7 — where does the decimal point go? (a) 0.315 (b) 31.5 (c) 3.15 (d) 0.0315
  11. 11.8.5 × 1.7 — where does the decimal point go? (a) 144.5 (b) 14.45 (c) 0.1445 (d) 1.445
  12. 12.0.77 × 4.8 — where does the decimal point go? (a) 36.96 (b) 0.03696 (c) 0.3696 (d) 3.696
  13. 13.0.23 × 0.9 — where does the decimal point go? (a) 0.207 (b) 2.07 (c) 0.0207 (d) 0.00207
  14. 14.5.7 × 0.2 — where does the decimal point go? (a) 11.4 (b) 0.114 (c) 1.14 (d) 0.0114
  15. 15.3.3 × 5 — where does the decimal point go? (a) 1.65 (b) 16.5 (c) 0.165 (d) 165
  16. 16.7.6 × 42 — where does the decimal point go? (a) 3.192 (b) 3192 (c) 31.92 (d) 319.2
  17. 17.0.19 × 2.4 — where does the decimal point go? (a) 0.456 (b) 0.00456 (c) 0.0456 (d) 4.56
  18. 18.0.52 × 29 — where does the decimal point go? (a) 0.1508 (b) 150.8 (c) 1.508 (d) 15.08
  19. 19.6.2 × 2 — where does the decimal point go? (a) 0.124 (b) 1.24 (c) 124 (d) 12.4
  20. 20.3.4 × 38 — where does the decimal point go? (a) 12.92 (b) 129.2 (c) 1292 (d) 1.292
  21. 21.0.83 × 0.3 — where does the decimal point go? (a) 2.49 (b) 0.00249 (c) 0.249 (d) 0.0249
  22. 22.0.36 × 0.9 — where does the decimal point go? (a) 3.24 (b) 0.0324 (c) 0.324 (d) 0.00324
  23. 23.9.2 × 0.9 — where does the decimal point go? (a) 0.0828 (b) 0.828 (c) 82.8 (d) 8.28
  24. 24.1.3 × 28 — where does the decimal point go? (a) 0.364 (b) 36.4 (c) 3.64 (d) 364
  25. 25.0.69 × 4 — where does the decimal point go? (a) 0.0276 (b) 0.276 (c) 27.6 (d) 2.76
  26. 26.0.17 × 4 — where does the decimal point go? (a) 0.068 (b) 0.0068 (c) 0.68 (d) 6.8
  27. 27.0.66 × 4.4 — where does the decimal point go? (a) 29.04 (b) 0.02904 (c) 2.904 (d) 0.2904
  28. 28.2.9 × 4.4 — where does the decimal point go? (a) 127.6 (b) 12.76 (c) 1.276 (d) 0.1276
  29. 29.3.8 × 0.9 — where does the decimal point go? (a) 3.42 (b) 0.342 (c) 0.0342 (d) 34.2
  30. 30.0.98 × 4 — where does the decimal point go? (a) 3.92 (b) 0.0392 (c) 0.392 (d) 39.2
  31. 31.0.29 × 0.2 — where does the decimal point go? (a) 0.00058 (b) 0.0058 (c) 0.058 (d) 0.58
  32. 32.5.3 × 0.6 — where does the decimal point go? (a) 0.318 (b) 31.8 (c) 3.18 (d) 0.0318
  33. 33.1.6 × 1.4 — where does the decimal point go? (a) 0.224 (b) 2.24 (c) 22.4 (d) 0.0224
  34. 34.0.28 × 0.3 — where does the decimal point go? (a) 0.084 (b) 0.0084 (c) 0.84 (d) 0.00084
  35. 35.0.76 × 46 — where does the decimal point go? (a) 0.3496 (b) 349.6 (c) 3.496 (d) 34.96
  36. 36.1.6 × 2.2 — where does the decimal point go? (a) 35.2 (b) 0.0352 (c) 0.352 (d) 3.52
  37. 37.8.9 × 4.1 — where does the decimal point go? (a) 364.9 (b) 0.3649 (c) 36.49 (d) 3.649
  38. 38.0.29 × 17 — where does the decimal point go? (a) 0.493 (b) 4.93 (c) 0.0493 (d) 49.3
  39. 39.0.47 × 4 — where does the decimal point go? (a) 1.88 (b) 18.8 (c) 0.188 (d) 0.0188
  40. 40.2.1 × 5 — where does the decimal point go? (a) 0.105 (b) 10.5 (c) 105 (d) 1.05

Answer key

  1. 1.806
  2. 4.35
  3. 19.6
  4. 46.5
  5. 3.66
  6. 6.72
  7. 29.7
  8. 0.096
  9. 6.37
  10. 3.15
  11. 14.45
  12. 3.696
  13. 0.207
  14. 1.14
  15. 16.5
  16. 319.2
  17. 0.456
  18. 15.08
  19. 12.4
  20. 129.2
  21. 0.249
  22. 0.324
  23. 8.28
  24. 36.4
  25. 2.76
  26. 0.68
  27. 2.904
  28. 12.76
  29. 3.42
  30. 3.92
  31. 0.058
  32. 3.18
  33. 2.24
  34. 0.084
  35. 34.96
  36. 3.52
  37. 36.49
  38. 4.93
  39. 1.88
  40. 10.5

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