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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 96 · 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. 1.1.4 × 2 — where does the decimal point go? (a) 2.8 (b) 28 (c) 0.28 (d) 0.028
  2. 2.5.9 × 1.9 — where does the decimal point go? (a) 11.21 (b) 0.1121 (c) 112.1 (d) 1.121
  3. 3.0.33 × 0.2 — where does the decimal point go? (a) 0.066 (b) 0.0066 (c) 0.66 (d) 0.00066
  4. 4.0.17 × 1.9 — where does the decimal point go? (a) 0.323 (b) 0.00323 (c) 3.23 (d) 0.0323
  5. 5.2.1 × 0.2 — where does the decimal point go? (a) 0.42 (b) 4.2 (c) 0.0042 (d) 0.042
  6. 6.0.76 × 7 — where does the decimal point go? (a) 5.32 (b) 0.0532 (c) 53.2 (d) 0.532
  7. 7.0.56 × 7 — where does the decimal point go? (a) 0.0392 (b) 39.2 (c) 0.392 (d) 3.92
  8. 8.0.83 × 4.8 — where does the decimal point go? (a) 3.984 (b) 39.84 (c) 0.3984 (d) 0.03984
  9. 9.0.88 × 2.2 — where does the decimal point go? (a) 1.936 (b) 0.1936 (c) 19.36 (d) 0.01936
  10. 10.0.89 × 2 — where does the decimal point go? (a) 0.178 (b) 0.0178 (c) 17.8 (d) 1.78
  11. 11.0.17 × 2.4 — where does the decimal point go? (a) 0.0408 (b) 0.408 (c) 4.08 (d) 0.00408
  12. 12.0.81 × 0.2 — where does the decimal point go? (a) 0.162 (b) 0.0162 (c) 1.62 (d) 0.00162
  13. 13.4.2 × 3.8 — where does the decimal point go? (a) 1.596 (b) 15.96 (c) 0.1596 (d) 159.6
  14. 14.7.3 × 0.7 — where does the decimal point go? (a) 5.11 (b) 0.0511 (c) 51.1 (d) 0.511
  15. 15.0.13 × 5 — where does the decimal point go? (a) 6.5 (b) 0.65 (c) 0.0065 (d) 0.065
  16. 16.0.77 × 4.4 — where does the decimal point go? (a) 0.3388 (b) 3.388 (c) 0.03388 (d) 33.88
  17. 17.1.8 × 26 — where does the decimal point go? (a) 468 (b) 46.8 (c) 0.468 (d) 4.68
  18. 18.4.7 × 0.8 — where does the decimal point go? (a) 3.76 (b) 0.0376 (c) 0.376 (d) 37.6
  19. 19.8.2 × 14 — where does the decimal point go? (a) 114.8 (b) 11.48 (c) 1148 (d) 1.148
  20. 20.0.86 × 26 — where does the decimal point go? (a) 0.2236 (b) 2.236 (c) 223.6 (d) 22.36
  21. 21.3.7 × 15 — where does the decimal point go? (a) 5.55 (b) 0.555 (c) 555 (d) 55.5
  22. 22.5.6 × 4.4 — where does the decimal point go? (a) 0.2464 (b) 2.464 (c) 24.64 (d) 246.4
  23. 23.1.3 × 2 — where does the decimal point go? (a) 26 (b) 0.26 (c) 0.026 (d) 2.6
  24. 24.0.12 × 2.6 — where does the decimal point go? (a) 0.00312 (b) 0.0312 (c) 0.312 (d) 3.12
  25. 25.4.3 × 5 — where does the decimal point go? (a) 215 (b) 2.15 (c) 21.5 (d) 0.215
  26. 26.6.3 × 8 — where does the decimal point go? (a) 504 (b) 50.4 (c) 0.504 (d) 5.04
  27. 27.3.1 × 0.2 — where does the decimal point go? (a) 0.0062 (b) 6.2 (c) 0.062 (d) 0.62
  28. 28.7.3 × 12 — where does the decimal point go? (a) 8.76 (b) 876 (c) 0.876 (d) 87.6
  29. 29.2.4 × 34 — where does the decimal point go? (a) 8.16 (b) 0.816 (c) 81.6 (d) 816
  30. 30.4.8 × 0.8 — where does the decimal point go? (a) 38.4 (b) 0.384 (c) 3.84 (d) 0.0384
  31. 31.0.21 × 23 — where does the decimal point go? (a) 0.483 (b) 4.83 (c) 0.0483 (d) 48.3
  32. 32.0.87 × 4.1 — where does the decimal point go? (a) 0.3567 (b) 0.03567 (c) 35.67 (d) 3.567
  33. 33.6.7 × 6 — where does the decimal point go? (a) 0.402 (b) 40.2 (c) 4.02 (d) 402
  34. 34.0.43 × 0.2 — where does the decimal point go? (a) 0.00086 (b) 0.86 (c) 0.0086 (d) 0.086
  35. 35.9.9 × 33 — where does the decimal point go? (a) 3.267 (b) 326.7 (c) 3267 (d) 32.67
  36. 36.0.16 × 4.9 — where does the decimal point go? (a) 0.0784 (b) 0.784 (c) 7.84 (d) 0.00784
  37. 37.0.84 × 9 — where does the decimal point go? (a) 75.6 (b) 7.56 (c) 0.756 (d) 0.0756
  38. 38.0.45 × 13 — where does the decimal point go? (a) 5.85 (b) 58.5 (c) 0.585 (d) 0.0585
  39. 39.0.14 × 11 — where does the decimal point go? (a) 0.154 (b) 15.4 (c) 1.54 (d) 0.0154
  40. 40.2.9 × 2.1 — where does the decimal point go? (a) 6.09 (b) 0.0609 (c) 60.9 (d) 0.609

Answer key

  1. 2.8
  2. 11.21
  3. 0.066
  4. 0.323
  5. 0.42
  6. 5.32
  7. 3.92
  8. 3.984
  9. 1.936
  10. 1.78
  11. 0.408
  12. 0.162
  13. 15.96
  14. 5.11
  15. 0.65
  16. 3.388
  17. 46.8
  18. 3.76
  19. 114.8
  20. 22.36
  21. 55.5
  22. 24.64
  23. 2.6
  24. 0.312
  25. 21.5
  26. 50.4
  27. 0.62
  28. 87.6
  29. 81.6
  30. 3.84
  31. 4.83
  32. 3.567
  33. 40.2
  34. 0.086
  35. 326.7
  36. 0.784
  37. 7.56
  38. 5.85
  39. 1.54
  40. 6.09

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