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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 776 · 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. 1.5.2 × 7 — where does the decimal point go? (a) 0.364 (b) 3.64 (c) 364 (d) 36.4
  2. 2.1.9 × 13 — where does the decimal point go? (a) 24.7 (b) 0.247 (c) 2.47 (d) 247
  3. 3.8.5 × 49 — where does the decimal point go? (a) 41.65 (b) 4.165 (c) 416.5 (d) 4165
  4. 4.9.8 × 0.4 — where does the decimal point go? (a) 39.2 (b) 0.0392 (c) 0.392 (d) 3.92
  5. 5.0.63 × 5 — where does the decimal point go? (a) 3.15 (b) 0.315 (c) 0.0315 (d) 31.5
  6. 6.3.3 × 0.6 — where does the decimal point go? (a) 1.98 (b) 0.0198 (c) 0.198 (d) 19.8
  7. 7.0.72 × 0.2 — where does the decimal point go? (a) 0.00144 (b) 0.144 (c) 1.44 (d) 0.0144
  8. 8.1.4 × 2.6 — where does the decimal point go? (a) 3.64 (b) 36.4 (c) 0.0364 (d) 0.364
  9. 9.7.3 × 8 — where does the decimal point go? (a) 5.84 (b) 58.4 (c) 0.584 (d) 584
  10. 10.6.9 × 27 — where does the decimal point go? (a) 18.63 (b) 1.863 (c) 186.3 (d) 1863
  11. 11.0.56 × 2.7 — where does the decimal point go? (a) 1.512 (b) 0.1512 (c) 15.12 (d) 0.01512
  12. 12.0.47 × 0.4 — where does the decimal point go? (a) 0.188 (b) 0.00188 (c) 1.88 (d) 0.0188
  13. 13.5.6 × 37 — where does the decimal point go? (a) 2072 (b) 207.2 (c) 2.072 (d) 20.72
  14. 14.0.37 × 8 — where does the decimal point go? (a) 2.96 (b) 29.6 (c) 0.296 (d) 0.0296
  15. 15.0.15 × 0.9 — where does the decimal point go? (a) 0.0135 (b) 1.35 (c) 0.00135 (d) 0.135
  16. 16.0.28 × 16 — where does the decimal point go? (a) 44.8 (b) 0.448 (c) 4.48 (d) 0.0448
  17. 17.1.7 × 3.5 — where does the decimal point go? (a) 0.0595 (b) 5.95 (c) 59.5 (d) 0.595
  18. 18.0.32 × 3 — where does the decimal point go? (a) 9.6 (b) 0.96 (c) 0.0096 (d) 0.096
  19. 19.3.4 × 0.3 — where does the decimal point go? (a) 0.102 (b) 0.0102 (c) 10.2 (d) 1.02
  20. 20.2.3 × 7 — where does the decimal point go? (a) 161 (b) 0.161 (c) 1.61 (d) 16.1
  21. 21.0.94 × 2 — where does the decimal point go? (a) 18.8 (b) 1.88 (c) 0.188 (d) 0.0188
  22. 22.4.3 × 5 — where does the decimal point go? (a) 2.15 (b) 21.5 (c) 0.215 (d) 215
  23. 23.7.8 × 4 — where does the decimal point go? (a) 0.312 (b) 31.2 (c) 3.12 (d) 312
  24. 24.4.6 × 8 — where does the decimal point go? (a) 36.8 (b) 3.68 (c) 0.368 (d) 368
  25. 25.7.1 × 1.5 — where does the decimal point go? (a) 1.065 (b) 0.1065 (c) 10.65 (d) 106.5
  26. 26.6.7 × 45 — where does the decimal point go? (a) 301.5 (b) 3015 (c) 30.15 (d) 3.015
  27. 27.1.6 × 23 — where does the decimal point go? (a) 3.68 (b) 368 (c) 36.8 (d) 0.368
  28. 28.0.71 × 0.3 — where does the decimal point go? (a) 2.13 (b) 0.00213 (c) 0.0213 (d) 0.213
  29. 29.4.6 × 1.2 — where does the decimal point go? (a) 5.52 (b) 55.2 (c) 0.0552 (d) 0.552
  30. 30.0.23 × 3 — where does the decimal point go? (a) 0.69 (b) 0.069 (c) 0.0069 (d) 6.9
  31. 31.2.4 × 4 — where does the decimal point go? (a) 96 (b) 0.096 (c) 0.96 (d) 9.6
  32. 32.8.2 × 0.6 — where does the decimal point go? (a) 4.92 (b) 0.492 (c) 0.0492 (d) 49.2
  33. 33.0.15 × 0.5 — where does the decimal point go? (a) 0.00075 (b) 0.75 (c) 0.075 (d) 0.0075
  34. 34.3.3 × 3 — where does the decimal point go? (a) 0.99 (b) 9.9 (c) 0.099 (d) 99
  35. 35.0.57 × 8 — where does the decimal point go? (a) 4.56 (b) 0.0456 (c) 0.456 (d) 45.6
  36. 36.4.1 × 17 — where does the decimal point go? (a) 0.697 (b) 6.97 (c) 697 (d) 69.7
  37. 37.0.13 × 1.5 — where does the decimal point go? (a) 0.0195 (b) 0.195 (c) 1.95 (d) 0.00195
  38. 38.8.8 × 2 — where does the decimal point go? (a) 176 (b) 1.76 (c) 17.6 (d) 0.176
  39. 39.9.2 × 2 — where does the decimal point go? (a) 1.84 (b) 18.4 (c) 184 (d) 0.184
  40. 40.7.6 × 4.8 — where does the decimal point go? (a) 364.8 (b) 3.648 (c) 36.48 (d) 0.3648

Answer key

  1. 36.4
  2. 24.7
  3. 416.5
  4. 3.92
  5. 3.15
  6. 1.98
  7. 0.144
  8. 3.64
  9. 58.4
  10. 186.3
  11. 1.512
  12. 0.188
  13. 207.2
  14. 2.96
  15. 0.135
  16. 4.48
  17. 5.95
  18. 0.96
  19. 1.02
  20. 16.1
  21. 1.88
  22. 21.5
  23. 31.2
  24. 36.8
  25. 10.65
  26. 301.5
  27. 36.8
  28. 0.213
  29. 5.52
  30. 0.69
  31. 9.6
  32. 4.92
  33. 0.075
  34. 9.9
  35. 4.56
  36. 69.7
  37. 0.195
  38. 17.6
  39. 18.4
  40. 36.48

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