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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 748 · 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. 1.5.7 × 0.5 — where does the decimal point go? (a) 2.85 (b) 0.0285 (c) 28.5 (d) 0.285
  2. 2.0.16 × 27 — where does the decimal point go? (a) 0.432 (b) 0.0432 (c) 4.32 (d) 43.2
  3. 3.0.56 × 0.2 — where does the decimal point go? (a) 0.112 (b) 1.12 (c) 0.0112 (d) 0.00112
  4. 4.0.22 × 4.6 — where does the decimal point go? (a) 1.012 (b) 0.1012 (c) 10.12 (d) 0.01012
  5. 5.1.7 × 19 — where does the decimal point go? (a) 323 (b) 0.323 (c) 3.23 (d) 32.3
  6. 6.0.64 × 2 — where does the decimal point go? (a) 12.8 (b) 0.128 (c) 0.0128 (d) 1.28
  7. 7.8.8 × 26 — where does the decimal point go? (a) 2.288 (b) 2288 (c) 22.88 (d) 228.8
  8. 8.1.4 × 0.6 — where does the decimal point go? (a) 0.84 (b) 8.4 (c) 0.0084 (d) 0.084
  9. 9.3.9 × 0.6 — where does the decimal point go? (a) 0.234 (b) 2.34 (c) 23.4 (d) 0.0234
  10. 10.7.6 × 4.3 — where does the decimal point go? (a) 0.3268 (b) 3.268 (c) 32.68 (d) 326.8
  11. 11.3.2 × 24 — where does the decimal point go? (a) 0.768 (b) 768 (c) 7.68 (d) 76.8
  12. 12.0.56 × 3.1 — where does the decimal point go? (a) 1.736 (b) 0.01736 (c) 17.36 (d) 0.1736
  13. 13.1.9 × 1.7 — where does the decimal point go? (a) 32.3 (b) 0.0323 (c) 3.23 (d) 0.323
  14. 14.0.21 × 2.5 — where does the decimal point go? (a) 5.25 (b) 0.00525 (c) 0.525 (d) 0.0525
  15. 15.4.7 × 21 — where does the decimal point go? (a) 9.87 (b) 0.987 (c) 987 (d) 98.7
  16. 16.2.6 × 2 — where does the decimal point go? (a) 0.52 (b) 52 (c) 0.052 (d) 5.2
  17. 17.0.12 × 0.8 — where does the decimal point go? (a) 0.96 (b) 0.00096 (c) 0.0096 (d) 0.096
  18. 18.0.69 × 5 — where does the decimal point go? (a) 0.0345 (b) 0.345 (c) 34.5 (d) 3.45
  19. 19.5.5 × 9 — where does the decimal point go? (a) 49.5 (b) 0.495 (c) 4.95 (d) 495
  20. 20.0.47 × 0.2 — where does the decimal point go? (a) 0.094 (b) 0.94 (c) 0.0094 (d) 0.00094
  21. 21.7.3 × 0.3 — where does the decimal point go? (a) 2.19 (b) 0.219 (c) 0.0219 (d) 21.9
  22. 22.2.8 × 0.2 — where does the decimal point go? (a) 0.0056 (b) 0.056 (c) 0.56 (d) 5.6
  23. 23.0.39 × 9 — where does the decimal point go? (a) 3.51 (b) 0.0351 (c) 0.351 (d) 35.1
  24. 24.3.2 × 8 — where does the decimal point go? (a) 0.256 (b) 2.56 (c) 256 (d) 25.6
  25. 25.2.3 × 43 — where does the decimal point go? (a) 989 (b) 0.989 (c) 98.9 (d) 9.89
  26. 26.0.29 × 0.6 — where does the decimal point go? (a) 0.174 (b) 0.00174 (c) 1.74 (d) 0.0174
  27. 27.0.54 × 34 — where does the decimal point go? (a) 1.836 (b) 0.1836 (c) 18.36 (d) 183.6
  28. 28.0.62 × 3.6 — where does the decimal point go? (a) 0.2232 (b) 0.02232 (c) 2.232 (d) 22.32
  29. 29.8.1 × 0.3 — where does the decimal point go? (a) 2.43 (b) 0.0243 (c) 0.243 (d) 24.3
  30. 30.0.76 × 4 — where does the decimal point go? (a) 3.04 (b) 0.0304 (c) 0.304 (d) 30.4
  31. 31.6.9 × 7 — where does the decimal point go? (a) 48.3 (b) 4.83 (c) 0.483 (d) 483
  32. 32.1.6 × 0.2 — where does the decimal point go? (a) 0.032 (b) 0.0032 (c) 0.32 (d) 3.2
  33. 33.0.92 × 0.9 — where does the decimal point go? (a) 8.28 (b) 0.0828 (c) 0.00828 (d) 0.828
  34. 34.5.7 × 4.4 — where does the decimal point go? (a) 2.508 (b) 250.8 (c) 0.2508 (d) 25.08
  35. 35.5.9 × 32 — where does the decimal point go? (a) 188.8 (b) 18.88 (c) 1.888 (d) 1888
  36. 36.4.1 × 9 — where does the decimal point go? (a) 0.369 (b) 369 (c) 36.9 (d) 3.69
  37. 37.9.5 × 13 — where does the decimal point go? (a) 123.5 (b) 12.35 (c) 1235 (d) 1.235
  38. 38.7.4 × 49 — where does the decimal point go? (a) 3626 (b) 3.626 (c) 36.26 (d) 362.6
  39. 39.0.54 × 2.8 — where does the decimal point go? (a) 1.512 (b) 0.01512 (c) 15.12 (d) 0.1512
  40. 40.2.2 × 2.6 — where does the decimal point go? (a) 0.572 (b) 0.0572 (c) 57.2 (d) 5.72

Answer key

  1. 2.85
  2. 4.32
  3. 0.112
  4. 1.012
  5. 32.3
  6. 1.28
  7. 228.8
  8. 0.84
  9. 2.34
  10. 32.68
  11. 76.8
  12. 1.736
  13. 3.23
  14. 0.525
  15. 98.7
  16. 5.2
  17. 0.096
  18. 3.45
  19. 49.5
  20. 0.094
  21. 2.19
  22. 0.56
  23. 3.51
  24. 25.6
  25. 98.9
  26. 0.174
  27. 18.36
  28. 2.232
  29. 2.43
  30. 3.04
  31. 48.3
  32. 0.32
  33. 0.828
  34. 25.08
  35. 188.8
  36. 36.9
  37. 123.5
  38. 362.6
  39. 1.512
  40. 5.72

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