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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 405 · 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. 1.0.98 × 1.4 — where does the decimal point go? (a) 1.372 (b) 13.72 (c) 0.01372 (d) 0.1372
  2. 2.1.9 × 2 — where does the decimal point go? (a) 0.38 (b) 3.8 (c) 0.038 (d) 38
  3. 3.0.32 × 0.3 — where does the decimal point go? (a) 0.00096 (b) 0.096 (c) 0.0096 (d) 0.96
  4. 4.0.77 × 41 — where does the decimal point go? (a) 31.57 (b) 3.157 (c) 0.3157 (d) 315.7
  5. 5.0.88 × 0.2 — where does the decimal point go? (a) 0.00176 (b) 0.0176 (c) 1.76 (d) 0.176
  6. 6.0.73 × 2 — where does the decimal point go? (a) 0.0146 (b) 1.46 (c) 0.146 (d) 14.6
  7. 7.0.31 × 4.9 — where does the decimal point go? (a) 1.519 (b) 0.01519 (c) 15.19 (d) 0.1519
  8. 8.5.7 × 17 — where does the decimal point go? (a) 96.9 (b) 9.69 (c) 0.969 (d) 969
  9. 9.0.33 × 19 — where does the decimal point go? (a) 0.0627 (b) 0.627 (c) 62.7 (d) 6.27
  10. 10.4.4 × 0.6 — where does the decimal point go? (a) 0.264 (b) 2.64 (c) 26.4 (d) 0.0264
  11. 11.0.34 × 38 — where does the decimal point go? (a) 129.2 (b) 0.1292 (c) 1.292 (d) 12.92
  12. 12.0.46 × 0.9 — where does the decimal point go? (a) 4.14 (b) 0.00414 (c) 0.0414 (d) 0.414
  13. 13.0.23 × 0.9 — where does the decimal point go? (a) 0.0207 (b) 2.07 (c) 0.207 (d) 0.00207
  14. 14.0.12 × 2 — where does the decimal point go? (a) 2.4 (b) 0.024 (c) 0.0024 (d) 0.24
  15. 15.9.2 × 0.6 — where does the decimal point go? (a) 0.0552 (b) 0.552 (c) 5.52 (d) 55.2
  16. 16.0.89 × 2 — where does the decimal point go? (a) 17.8 (b) 1.78 (c) 0.0178 (d) 0.178
  17. 17.4.6 × 8 — where does the decimal point go? (a) 36.8 (b) 3.68 (c) 368 (d) 0.368
  18. 18.5.4 × 2.3 — where does the decimal point go? (a) 124.2 (b) 12.42 (c) 1.242 (d) 0.1242
  19. 19.3.2 × 3.4 — where does the decimal point go? (a) 0.1088 (b) 1.088 (c) 10.88 (d) 108.8
  20. 20.0.95 × 0.3 — where does the decimal point go? (a) 0.0285 (b) 0.285 (c) 2.85 (d) 0.00285
  21. 21.1.3 × 33 — where does the decimal point go? (a) 429 (b) 0.429 (c) 4.29 (d) 42.9
  22. 22.0.47 × 12 — where does the decimal point go? (a) 0.564 (b) 56.4 (c) 0.0564 (d) 5.64
  23. 23.0.77 × 45 — where does the decimal point go? (a) 346.5 (b) 3.465 (c) 34.65 (d) 0.3465
  24. 24.0.68 × 4.1 — where does the decimal point go? (a) 2.788 (b) 0.02788 (c) 27.88 (d) 0.2788
  25. 25.9.4 × 2 — where does the decimal point go? (a) 188 (b) 1.88 (c) 0.188 (d) 18.8
  26. 26.3.7 × 2.4 — where does the decimal point go? (a) 0.888 (b) 88.8 (c) 8.88 (d) 0.0888
  27. 27.6.5 × 0.3 — where does the decimal point go? (a) 0.195 (b) 0.0195 (c) 19.5 (d) 1.95
  28. 28.8.3 × 8 — where does the decimal point go? (a) 664 (b) 0.664 (c) 66.4 (d) 6.64
  29. 29.0.33 × 5 — where does the decimal point go? (a) 0.165 (b) 16.5 (c) 0.0165 (d) 1.65
  30. 30.3.3 × 9 — where does the decimal point go? (a) 0.297 (b) 29.7 (c) 297 (d) 2.97
  31. 31.7.3 × 4.8 — where does the decimal point go? (a) 0.3504 (b) 350.4 (c) 3.504 (d) 35.04
  32. 32.0.18 × 0.6 — where does the decimal point go? (a) 0.108 (b) 0.0108 (c) 0.00108 (d) 1.08
  33. 33.1.8 × 0.2 — where does the decimal point go? (a) 0.036 (b) 3.6 (c) 0.36 (d) 0.0036
  34. 34.5.4 × 8 — where does the decimal point go? (a) 4.32 (b) 43.2 (c) 0.432 (d) 432
  35. 35.0.29 × 6 — where does the decimal point go? (a) 0.174 (b) 0.0174 (c) 1.74 (d) 17.4
  36. 36.0.98 × 6 — where does the decimal point go? (a) 0.588 (b) 5.88 (c) 0.0588 (d) 58.8
  37. 37.5.2 × 28 — where does the decimal point go? (a) 14.56 (b) 145.6 (c) 1.456 (d) 1456
  38. 38.9.1 × 13 — where does the decimal point go? (a) 1.183 (b) 118.3 (c) 11.83 (d) 1183
  39. 39.2.1 × 0.2 — where does the decimal point go? (a) 0.042 (b) 4.2 (c) 0.0042 (d) 0.42
  40. 40.7.4 × 14 — where does the decimal point go? (a) 1.036 (b) 1036 (c) 103.6 (d) 10.36

Answer key

  1. 1.372
  2. 3.8
  3. 0.096
  4. 31.57
  5. 0.176
  6. 1.46
  7. 1.519
  8. 96.9
  9. 6.27
  10. 2.64
  11. 12.92
  12. 0.414
  13. 0.207
  14. 0.24
  15. 5.52
  16. 1.78
  17. 36.8
  18. 12.42
  19. 10.88
  20. 0.285
  21. 42.9
  22. 5.64
  23. 34.65
  24. 2.788
  25. 18.8
  26. 8.88
  27. 1.95
  28. 66.4
  29. 1.65
  30. 29.7
  31. 35.04
  32. 0.108
  33. 0.36
  34. 43.2
  35. 1.74
  36. 5.88
  37. 145.6
  38. 118.3
  39. 0.42
  40. 103.6

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