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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 434 · 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. 1.0.37 × 1.9 — where does the decimal point go? (a) 0.00703 (b) 0.0703 (c) 7.03 (d) 0.703
  2. 2.6.7 × 0.4 — where does the decimal point go? (a) 0.268 (b) 26.8 (c) 2.68 (d) 0.0268
  3. 3.0.44 × 0.2 — where does the decimal point go? (a) 0.0088 (b) 0.00088 (c) 0.088 (d) 0.88
  4. 4.0.23 × 0.9 — where does the decimal point go? (a) 0.00207 (b) 0.207 (c) 0.0207 (d) 2.07
  5. 5.0.71 × 3.9 — where does the decimal point go? (a) 2.769 (b) 27.69 (c) 0.2769 (d) 0.02769
  6. 6.0.39 × 2.4 — where does the decimal point go? (a) 0.936 (b) 0.0936 (c) 0.00936 (d) 9.36
  7. 7.8.1 × 0.8 — where does the decimal point go? (a) 0.0648 (b) 64.8 (c) 6.48 (d) 0.648
  8. 8.0.37 × 0.9 — where does the decimal point go? (a) 3.33 (b) 0.00333 (c) 0.333 (d) 0.0333
  9. 9.3.3 × 0.8 — where does the decimal point go? (a) 0.0264 (b) 2.64 (c) 26.4 (d) 0.264
  10. 10.1.5 × 21 — where does the decimal point go? (a) 315 (b) 31.5 (c) 3.15 (d) 0.315
  11. 11.6.1 × 3.5 — where does the decimal point go? (a) 2.135 (b) 0.2135 (c) 21.35 (d) 213.5
  12. 12.4.7 × 0.5 — where does the decimal point go? (a) 2.35 (b) 23.5 (c) 0.0235 (d) 0.235
  13. 13.0.18 × 1.6 — where does the decimal point go? (a) 0.00288 (b) 0.288 (c) 2.88 (d) 0.0288
  14. 14.1.5 × 7 — where does the decimal point go? (a) 0.105 (b) 1.05 (c) 10.5 (d) 105
  15. 15.0.31 × 48 — where does the decimal point go? (a) 1.488 (b) 148.8 (c) 14.88 (d) 0.1488
  16. 16.0.49 × 47 — where does the decimal point go? (a) 0.2303 (b) 23.03 (c) 2.303 (d) 230.3
  17. 17.2.6 × 11 — where does the decimal point go? (a) 28.6 (b) 0.286 (c) 286 (d) 2.86
  18. 18.0.59 × 0.3 — where does the decimal point go? (a) 1.77 (b) 0.00177 (c) 0.0177 (d) 0.177
  19. 19.0.15 × 0.3 — where does the decimal point go? (a) 0.045 (b) 0.00045 (c) 0.45 (d) 0.0045
  20. 20.7.8 × 2.4 — where does the decimal point go? (a) 18.72 (b) 0.1872 (c) 1.872 (d) 187.2
  21. 21.9.3 × 2 — where does the decimal point go? (a) 0.186 (b) 18.6 (c) 1.86 (d) 186
  22. 22.4.2 × 0.7 — where does the decimal point go? (a) 0.0294 (b) 0.294 (c) 29.4 (d) 2.94
  23. 23.1.2 × 4 — where does the decimal point go? (a) 4.8 (b) 0.48 (c) 0.048 (d) 48
  24. 24.7.7 × 0.5 — where does the decimal point go? (a) 0.0385 (b) 0.385 (c) 38.5 (d) 3.85
  25. 25.0.66 × 2.9 — where does the decimal point go? (a) 0.1914 (b) 1.914 (c) 0.01914 (d) 19.14
  26. 26.1.9 × 21 — where does the decimal point go? (a) 399 (b) 39.9 (c) 0.399 (d) 3.99
  27. 27.0.33 × 2 — where does the decimal point go? (a) 6.6 (b) 0.66 (c) 0.0066 (d) 0.066
  28. 28.0.79 × 1.5 — where does the decimal point go? (a) 0.1185 (b) 0.01185 (c) 1.185 (d) 11.85
  29. 29.5.4 × 3.2 — where does the decimal point go? (a) 17.28 (b) 172.8 (c) 1.728 (d) 0.1728
  30. 30.0.69 × 4 — where does the decimal point go? (a) 2.76 (b) 0.276 (c) 0.0276 (d) 27.6
  31. 31.2.4 × 8 — where does the decimal point go? (a) 192 (b) 0.192 (c) 1.92 (d) 19.2
  32. 32.1.6 × 6 — where does the decimal point go? (a) 9.6 (b) 0.96 (c) 0.096 (d) 96
  33. 33.8.6 × 31 — where does the decimal point go? (a) 26.66 (b) 266.6 (c) 2666 (d) 2.666
  34. 34.3.8 × 0.4 — where does the decimal point go? (a) 1.52 (b) 0.0152 (c) 0.152 (d) 15.2
  35. 35.0.37 × 4.6 — where does the decimal point go? (a) 0.01702 (b) 0.1702 (c) 1.702 (d) 17.02
  36. 36.0.81 × 0.4 — where does the decimal point go? (a) 0.00324 (b) 0.0324 (c) 0.324 (d) 3.24
  37. 37.0.94 × 3 — where does the decimal point go? (a) 0.282 (b) 0.0282 (c) 28.2 (d) 2.82
  38. 38.0.53 × 4 — where does the decimal point go? (a) 21.2 (b) 0.0212 (c) 2.12 (d) 0.212
  39. 39.0.58 × 6 — where does the decimal point go? (a) 0.348 (b) 0.0348 (c) 3.48 (d) 34.8
  40. 40.0.37 × 11 — where does the decimal point go? (a) 40.7 (b) 0.407 (c) 0.0407 (d) 4.07

Answer key

  1. 0.703
  2. 2.68
  3. 0.088
  4. 0.207
  5. 2.769
  6. 0.936
  7. 6.48
  8. 0.333
  9. 2.64
  10. 31.5
  11. 21.35
  12. 2.35
  13. 0.288
  14. 10.5
  15. 14.88
  16. 23.03
  17. 28.6
  18. 0.177
  19. 0.045
  20. 18.72
  21. 18.6
  22. 2.94
  23. 4.8
  24. 3.85
  25. 1.914
  26. 39.9
  27. 0.66
  28. 1.185
  29. 17.28
  30. 2.76
  31. 19.2
  32. 9.6
  33. 266.6
  34. 1.52
  35. 1.702
  36. 0.324
  37. 2.82
  38. 2.12
  39. 3.48
  40. 4.07

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