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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 727 · 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. 1.0.92 × 1.9 — where does the decimal point go? (a) 0.01748 (b) 17.48 (c) 1.748 (d) 0.1748
  2. 2.6.1 × 7 — where does the decimal point go? (a) 427 (b) 42.7 (c) 4.27 (d) 0.427
  3. 3.0.95 × 0.7 — where does the decimal point go? (a) 0.00665 (b) 0.665 (c) 6.65 (d) 0.0665
  4. 4.5.7 × 3.1 — where does the decimal point go? (a) 176.7 (b) 1.767 (c) 0.1767 (d) 17.67
  5. 5.7.4 × 0.2 — where does the decimal point go? (a) 0.148 (b) 14.8 (c) 1.48 (d) 0.0148
  6. 6.0.63 × 0.5 — where does the decimal point go? (a) 0.315 (b) 3.15 (c) 0.00315 (d) 0.0315
  7. 7.0.62 × 4.4 — where does the decimal point go? (a) 0.2728 (b) 2.728 (c) 27.28 (d) 0.02728
  8. 8.5.4 × 6 — where does the decimal point go? (a) 3.24 (b) 324 (c) 32.4 (d) 0.324
  9. 9.4.8 × 8 — where does the decimal point go? (a) 38.4 (b) 3.84 (c) 384 (d) 0.384
  10. 10.0.23 × 0.9 — where does the decimal point go? (a) 0.00207 (b) 2.07 (c) 0.207 (d) 0.0207
  11. 11.3.3 × 31 — where does the decimal point go? (a) 1.023 (b) 1023 (c) 102.3 (d) 10.23
  12. 12.0.21 × 24 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 0.0504 (d) 5.04
  13. 13.0.69 × 16 — where does the decimal point go? (a) 11.04 (b) 110.4 (c) 0.1104 (d) 1.104
  14. 14.0.55 × 7 — where does the decimal point go? (a) 3.85 (b) 0.0385 (c) 0.385 (d) 38.5
  15. 15.7.4 × 0.6 — where does the decimal point go? (a) 4.44 (b) 0.444 (c) 0.0444 (d) 44.4
  16. 16.2.8 × 0.2 — where does the decimal point go? (a) 0.056 (b) 5.6 (c) 0.56 (d) 0.0056
  17. 17.6.1 × 43 — where does the decimal point go? (a) 262.3 (b) 2623 (c) 26.23 (d) 2.623
  18. 18.2.7 × 1.4 — where does the decimal point go? (a) 37.8 (b) 3.78 (c) 0.0378 (d) 0.378
  19. 19.1.6 × 4 — where does the decimal point go? (a) 64 (b) 0.064 (c) 0.64 (d) 6.4
  20. 20.0.77 × 17 — where does the decimal point go? (a) 0.1309 (b) 130.9 (c) 13.09 (d) 1.309
  21. 21.0.98 × 3.8 — where does the decimal point go? (a) 37.24 (b) 0.03724 (c) 0.3724 (d) 3.724
  22. 22.0.52 × 0.3 — where does the decimal point go? (a) 0.00156 (b) 0.0156 (c) 1.56 (d) 0.156
  23. 23.7.4 × 2.2 — where does the decimal point go? (a) 0.1628 (b) 16.28 (c) 162.8 (d) 1.628
  24. 24.0.52 × 7 — where does the decimal point go? (a) 0.0364 (b) 3.64 (c) 36.4 (d) 0.364
  25. 25.1.9 × 3.3 — where does the decimal point go? (a) 0.0627 (b) 0.627 (c) 62.7 (d) 6.27
  26. 26.7.6 × 0.3 — where does the decimal point go? (a) 0.0228 (b) 0.228 (c) 22.8 (d) 2.28
  27. 27.0.21 × 18 — where does the decimal point go? (a) 3.78 (b) 0.378 (c) 0.0378 (d) 37.8
  28. 28.8.7 × 41 — where does the decimal point go? (a) 3.567 (b) 35.67 (c) 3567 (d) 356.7
  29. 29.0.43 × 8 — where does the decimal point go? (a) 34.4 (b) 3.44 (c) 0.344 (d) 0.0344
  30. 30.9.1 × 2.5 — where does the decimal point go? (a) 2.275 (b) 0.2275 (c) 22.75 (d) 227.5
  31. 31.5.7 × 1.3 — where does the decimal point go? (a) 0.741 (b) 7.41 (c) 0.0741 (d) 74.1
  32. 32.0.73 × 0.9 — where does the decimal point go? (a) 0.657 (b) 6.57 (c) 0.0657 (d) 0.00657
  33. 33.0.49 × 16 — where does the decimal point go? (a) 7.84 (b) 0.784 (c) 0.0784 (d) 78.4
  34. 34.0.94 × 2 — where does the decimal point go? (a) 0.0188 (b) 1.88 (c) 18.8 (d) 0.188
  35. 35.2.6 × 0.8 — where does the decimal point go? (a) 2.08 (b) 0.0208 (c) 20.8 (d) 0.208
  36. 36.0.66 × 3.2 — where does the decimal point go? (a) 2.112 (b) 0.2112 (c) 0.02112 (d) 21.12
  37. 37.2.3 × 3 — where does the decimal point go? (a) 6.9 (b) 0.69 (c) 69 (d) 0.069
  38. 38.1.3 × 5 — where does the decimal point go? (a) 0.065 (b) 65 (c) 0.65 (d) 6.5
  39. 39.5.7 × 8 — where does the decimal point go? (a) 4.56 (b) 0.456 (c) 45.6 (d) 456
  40. 40.9.5 × 35 — where does the decimal point go? (a) 332.5 (b) 3.325 (c) 33.25 (d) 3325

Answer key

  1. 1.748
  2. 42.7
  3. 0.665
  4. 17.67
  5. 1.48
  6. 0.315
  7. 2.728
  8. 32.4
  9. 38.4
  10. 0.207
  11. 102.3
  12. 5.04
  13. 11.04
  14. 3.85
  15. 4.44
  16. 0.56
  17. 262.3
  18. 3.78
  19. 6.4
  20. 13.09
  21. 3.724
  22. 0.156
  23. 16.28
  24. 3.64
  25. 6.27
  26. 2.28
  27. 3.78
  28. 356.7
  29. 3.44
  30. 22.75
  31. 7.41
  32. 0.657
  33. 7.84
  34. 1.88
  35. 2.08
  36. 2.112
  37. 6.9
  38. 6.5
  39. 45.6
  40. 332.5

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