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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 774 · 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. 1.0.53 × 5 — where does the decimal point go? (a) 0.0265 (b) 0.265 (c) 26.5 (d) 2.65
  2. 2.0.69 × 3.2 — where does the decimal point go? (a) 22.08 (b) 2.208 (c) 0.02208 (d) 0.2208
  3. 3.0.92 × 4 — where does the decimal point go? (a) 0.0368 (b) 36.8 (c) 3.68 (d) 0.368
  4. 4.0.36 × 3 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 1.08 (d) 10.8
  5. 5.7.5 × 25 — where does the decimal point go? (a) 18.75 (b) 187.5 (c) 1875 (d) 1.875
  6. 6.5.8 × 41 — where does the decimal point go? (a) 2378 (b) 23.78 (c) 237.8 (d) 2.378
  7. 7.2.4 × 1.6 — where does the decimal point go? (a) 0.384 (b) 0.0384 (c) 3.84 (d) 38.4
  8. 8.0.17 × 1.8 — where does the decimal point go? (a) 0.0306 (b) 0.00306 (c) 0.306 (d) 3.06
  9. 9.8.4 × 43 — where does the decimal point go? (a) 3612 (b) 361.2 (c) 36.12 (d) 3.612
  10. 10.3.6 × 9 — where does the decimal point go? (a) 324 (b) 3.24 (c) 32.4 (d) 0.324
  11. 11.1.9 × 2 — where does the decimal point go? (a) 0.38 (b) 3.8 (c) 38 (d) 0.038
  12. 12.0.29 × 0.3 — where does the decimal point go? (a) 0.0087 (b) 0.00087 (c) 0.87 (d) 0.087
  13. 13.8.3 × 0.8 — where does the decimal point go? (a) 0.664 (b) 66.4 (c) 6.64 (d) 0.0664
  14. 14.4.1 × 3.6 — where does the decimal point go? (a) 147.6 (b) 14.76 (c) 0.1476 (d) 1.476
  15. 15.0.69 × 8 — where does the decimal point go? (a) 55.2 (b) 0.0552 (c) 5.52 (d) 0.552
  16. 16.0.77 × 29 — where does the decimal point go? (a) 22.33 (b) 2.233 (c) 0.2233 (d) 223.3
  17. 17.7.7 × 2.4 — where does the decimal point go? (a) 0.1848 (b) 1.848 (c) 184.8 (d) 18.48
  18. 18.8.8 × 2 — where does the decimal point go? (a) 1.76 (b) 176 (c) 0.176 (d) 17.6
  19. 19.6.9 × 9 — where does the decimal point go? (a) 0.621 (b) 621 (c) 62.1 (d) 6.21
  20. 20.0.46 × 14 — where does the decimal point go? (a) 6.44 (b) 64.4 (c) 0.644 (d) 0.0644
  21. 21.2.1 × 0.5 — where does the decimal point go? (a) 0.105 (b) 0.0105 (c) 10.5 (d) 1.05
  22. 22.0.79 × 15 — where does the decimal point go? (a) 11.85 (b) 1.185 (c) 0.1185 (d) 118.5
  23. 23.0.12 × 41 — where does the decimal point go? (a) 4.92 (b) 0.0492 (c) 49.2 (d) 0.492
  24. 24.0.41 × 35 — where does the decimal point go? (a) 143.5 (b) 0.1435 (c) 14.35 (d) 1.435
  25. 25.0.25 × 0.3 — where does the decimal point go? (a) 0.075 (b) 0.75 (c) 0.0075 (d) 0.00075
  26. 26.7.4 × 0.9 — where does the decimal point go? (a) 6.66 (b) 66.6 (c) 0.666 (d) 0.0666
  27. 27.5.8 × 3 — where does the decimal point go? (a) 17.4 (b) 1.74 (c) 0.174 (d) 174
  28. 28.0.33 × 0.3 — where does the decimal point go? (a) 0.99 (b) 0.0099 (c) 0.00099 (d) 0.099
  29. 29.1.6 × 0.8 — where does the decimal point go? (a) 12.8 (b) 1.28 (c) 0.0128 (d) 0.128
  30. 30.7.5 × 45 — where does the decimal point go? (a) 33.75 (b) 337.5 (c) 3.375 (d) 3375
  31. 31.0.56 × 4.7 — where does the decimal point go? (a) 26.32 (b) 2.632 (c) 0.02632 (d) 0.2632
  32. 32.8.2 × 4 — where does the decimal point go? (a) 32.8 (b) 0.328 (c) 3.28 (d) 328
  33. 33.0.22 × 38 — where does the decimal point go? (a) 83.6 (b) 0.836 (c) 0.0836 (d) 8.36
  34. 34.1.8 × 47 — where does the decimal point go? (a) 84.6 (b) 846 (c) 0.846 (d) 8.46
  35. 35.1.6 × 4 — where does the decimal point go? (a) 64 (b) 0.064 (c) 0.64 (d) 6.4
  36. 36.3.6 × 3.6 — where does the decimal point go? (a) 0.1296 (b) 1.296 (c) 129.6 (d) 12.96
  37. 37.4.5 × 5 — where does the decimal point go? (a) 225 (b) 2.25 (c) 0.225 (d) 22.5
  38. 38.0.62 × 0.3 — where does the decimal point go? (a) 1.86 (b) 0.00186 (c) 0.186 (d) 0.0186
  39. 39.0.19 × 0.4 — where does the decimal point go? (a) 0.76 (b) 0.076 (c) 0.0076 (d) 0.00076
  40. 40.0.63 × 5 — where does the decimal point go? (a) 31.5 (b) 0.315 (c) 0.0315 (d) 3.15

Answer key

  1. 2.65
  2. 2.208
  3. 3.68
  4. 1.08
  5. 187.5
  6. 237.8
  7. 3.84
  8. 0.306
  9. 361.2
  10. 32.4
  11. 3.8
  12. 0.087
  13. 6.64
  14. 14.76
  15. 5.52
  16. 22.33
  17. 18.48
  18. 17.6
  19. 62.1
  20. 6.44
  21. 1.05
  22. 11.85
  23. 4.92
  24. 14.35
  25. 0.075
  26. 6.66
  27. 17.4
  28. 0.099
  29. 1.28
  30. 337.5
  31. 2.632
  32. 32.8
  33. 8.36
  34. 84.6
  35. 6.4
  36. 12.96
  37. 22.5
  38. 0.186
  39. 0.076
  40. 3.15

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