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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 252 · 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 × 4 — where does the decimal point go? (a) 14.8 (b) 0.148 (c) 0.0148 (d) 1.48
  2. 2.0.53 × 0.5 — where does the decimal point go? (a) 0.00265 (b) 0.265 (c) 0.0265 (d) 2.65
  3. 3.0.12 × 31 — where does the decimal point go? (a) 37.2 (b) 3.72 (c) 0.372 (d) 0.0372
  4. 4.1.3 × 0.8 — where does the decimal point go? (a) 0.0104 (b) 0.104 (c) 1.04 (d) 10.4
  5. 5.2.8 × 41 — where does the decimal point go? (a) 11.48 (b) 1.148 (c) 114.8 (d) 1148
  6. 6.3.9 × 19 — where does the decimal point go? (a) 0.741 (b) 7.41 (c) 74.1 (d) 741
  7. 7.0.36 × 2 — where does the decimal point go? (a) 0.072 (b) 7.2 (c) 0.72 (d) 0.0072
  8. 8.0.37 × 27 — where does the decimal point go? (a) 0.0999 (b) 99.9 (c) 0.999 (d) 9.99
  9. 9.2.1 × 4.7 — where does the decimal point go? (a) 9.87 (b) 0.987 (c) 0.0987 (d) 98.7
  10. 10.3.8 × 4 — where does the decimal point go? (a) 15.2 (b) 0.152 (c) 1.52 (d) 152
  11. 11.0.52 × 4.7 — where does the decimal point go? (a) 0.02444 (b) 0.2444 (c) 24.44 (d) 2.444
  12. 12.0.19 × 9 — where does the decimal point go? (a) 0.171 (b) 1.71 (c) 0.0171 (d) 17.1
  13. 13.0.19 × 0.3 — where does the decimal point go? (a) 0.057 (b) 0.0057 (c) 0.57 (d) 0.00057
  14. 14.0.96 × 17 — where does the decimal point go? (a) 163.2 (b) 0.1632 (c) 16.32 (d) 1.632
  15. 15.3.6 × 8 — where does the decimal point go? (a) 288 (b) 2.88 (c) 28.8 (d) 0.288
  16. 16.7.3 × 0.5 — where does the decimal point go? (a) 36.5 (b) 3.65 (c) 0.0365 (d) 0.365
  17. 17.0.12 × 6 — where does the decimal point go? (a) 0.72 (b) 7.2 (c) 0.072 (d) 0.0072
  18. 18.9.8 × 0.4 — where does the decimal point go? (a) 3.92 (b) 0.392 (c) 39.2 (d) 0.0392
  19. 19.0.27 × 48 — where does the decimal point go? (a) 0.1296 (b) 1.296 (c) 129.6 (d) 12.96
  20. 20.3.9 × 5 — where does the decimal point go? (a) 1.95 (b) 0.195 (c) 19.5 (d) 195
  21. 21.2.8 × 2.6 — where does the decimal point go? (a) 7.28 (b) 0.728 (c) 72.8 (d) 0.0728
  22. 22.6.1 × 37 — where does the decimal point go? (a) 225.7 (b) 2257 (c) 2.257 (d) 22.57
  23. 23.0.91 × 3.8 — where does the decimal point go? (a) 0.03458 (b) 3.458 (c) 34.58 (d) 0.3458
  24. 24.0.99 × 4.6 — where does the decimal point go? (a) 4.554 (b) 0.04554 (c) 45.54 (d) 0.4554
  25. 25.9.8 × 2.1 — where does the decimal point go? (a) 205.8 (b) 2.058 (c) 0.2058 (d) 20.58
  26. 26.0.17 × 0.6 — where does the decimal point go? (a) 1.02 (b) 0.0102 (c) 0.00102 (d) 0.102
  27. 27.9.9 × 45 — where does the decimal point go? (a) 4455 (b) 44.55 (c) 4.455 (d) 445.5
  28. 28.0.68 × 0.4 — where does the decimal point go? (a) 0.00272 (b) 2.72 (c) 0.0272 (d) 0.272
  29. 29.0.22 × 2 — where does the decimal point go? (a) 0.0044 (b) 4.4 (c) 0.44 (d) 0.044
  30. 30.0.24 × 0.4 — where does the decimal point go? (a) 0.096 (b) 0.0096 (c) 0.96 (d) 0.00096
  31. 31.0.93 × 1.4 — where does the decimal point go? (a) 13.02 (b) 0.01302 (c) 0.1302 (d) 1.302
  32. 32.0.33 × 34 — where does the decimal point go? (a) 1.122 (b) 112.2 (c) 0.1122 (d) 11.22
  33. 33.0.78 × 36 — where does the decimal point go? (a) 28.08 (b) 280.8 (c) 0.2808 (d) 2.808
  34. 34.0.81 × 4 — where does the decimal point go? (a) 3.24 (b) 0.324 (c) 32.4 (d) 0.0324
  35. 35.8.7 × 6 — where does the decimal point go? (a) 5.22 (b) 0.522 (c) 52.2 (d) 522
  36. 36.8.3 × 1.3 — where does the decimal point go? (a) 1.079 (b) 107.9 (c) 10.79 (d) 0.1079
  37. 37.0.38 × 28 — where does the decimal point go? (a) 0.1064 (b) 1.064 (c) 106.4 (d) 10.64
  38. 38.8.4 × 8 — where does the decimal point go? (a) 67.2 (b) 6.72 (c) 0.672 (d) 672
  39. 39.0.65 × 15 — where does the decimal point go? (a) 9.75 (b) 97.5 (c) 0.975 (d) 0.0975
  40. 40.0.57 × 7 — where does the decimal point go? (a) 3.99 (b) 0.0399 (c) 39.9 (d) 0.399

Answer key

  1. 1.48
  2. 0.265
  3. 3.72
  4. 1.04
  5. 114.8
  6. 74.1
  7. 0.72
  8. 9.99
  9. 9.87
  10. 15.2
  11. 2.444
  12. 1.71
  13. 0.057
  14. 16.32
  15. 28.8
  16. 3.65
  17. 0.72
  18. 3.92
  19. 12.96
  20. 19.5
  21. 7.28
  22. 225.7
  23. 3.458
  24. 4.554
  25. 20.58
  26. 0.102
  27. 445.5
  28. 0.272
  29. 0.44
  30. 0.096
  31. 1.302
  32. 11.22
  33. 28.08
  34. 3.24
  35. 52.2
  36. 10.79
  37. 10.64
  38. 67.2
  39. 9.75
  40. 3.99

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