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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 562 · 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. 1.7.8 × 0.8 — where does the decimal point go? (a) 6.24 (b) 0.0624 (c) 0.624 (d) 62.4
  2. 2.3.3 × 2 — where does the decimal point go? (a) 0.66 (b) 6.6 (c) 66 (d) 0.066
  3. 3.1.2 × 2 — where does the decimal point go? (a) 2.4 (b) 0.24 (c) 0.024 (d) 24
  4. 4.0.24 × 2.8 — where does the decimal point go? (a) 0.672 (b) 0.00672 (c) 0.0672 (d) 6.72
  5. 5.0.47 × 0.9 — where does the decimal point go? (a) 0.423 (b) 4.23 (c) 0.0423 (d) 0.00423
  6. 6.4.1 × 25 — where does the decimal point go? (a) 102.5 (b) 1.025 (c) 10.25 (d) 1025
  7. 7.0.65 × 43 — where does the decimal point go? (a) 2.795 (b) 0.2795 (c) 27.95 (d) 279.5
  8. 8.3.7 × 39 — where does the decimal point go? (a) 1.443 (b) 14.43 (c) 144.3 (d) 1443
  9. 9.0.35 × 5 — where does the decimal point go? (a) 0.0175 (b) 1.75 (c) 0.175 (d) 17.5
  10. 10.0.98 × 0.9 — where does the decimal point go? (a) 8.82 (b) 0.0882 (c) 0.882 (d) 0.00882
  11. 11.3.1 × 27 — where does the decimal point go? (a) 8.37 (b) 837 (c) 0.837 (d) 83.7
  12. 12.0.36 × 8 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 28.8 (d) 0.0288
  13. 13.3.1 × 3.7 — where does the decimal point go? (a) 11.47 (b) 114.7 (c) 0.1147 (d) 1.147
  14. 14.0.72 × 1.7 — where does the decimal point go? (a) 0.1224 (b) 1.224 (c) 12.24 (d) 0.01224
  15. 15.0.18 × 14 — where does the decimal point go? (a) 0.252 (b) 25.2 (c) 2.52 (d) 0.0252
  16. 16.1.8 × 34 — where does the decimal point go? (a) 612 (b) 6.12 (c) 61.2 (d) 0.612
  17. 17.8.6 × 37 — where does the decimal point go? (a) 318.2 (b) 31.82 (c) 3182 (d) 3.182
  18. 18.5.5 × 37 — where does the decimal point go? (a) 20.35 (b) 203.5 (c) 2035 (d) 2.035
  19. 19.7.4 × 32 — where does the decimal point go? (a) 23.68 (b) 2.368 (c) 236.8 (d) 2368
  20. 20.0.16 × 6 — where does the decimal point go? (a) 0.96 (b) 0.096 (c) 9.6 (d) 0.0096
  21. 21.1.4 × 0.3 — where does the decimal point go? (a) 0.042 (b) 0.42 (c) 0.0042 (d) 4.2
  22. 22.1.6 × 21 — where does the decimal point go? (a) 336 (b) 0.336 (c) 33.6 (d) 3.36
  23. 23.0.46 × 29 — where does the decimal point go? (a) 0.1334 (b) 133.4 (c) 13.34 (d) 1.334
  24. 24.8.7 × 0.3 — where does the decimal point go? (a) 0.261 (b) 0.0261 (c) 26.1 (d) 2.61
  25. 25.0.18 × 0.9 — where does the decimal point go? (a) 0.162 (b) 0.00162 (c) 0.0162 (d) 1.62
  26. 26.5.7 × 0.3 — where does the decimal point go? (a) 0.0171 (b) 17.1 (c) 0.171 (d) 1.71
  27. 27.9.8 × 27 — where does the decimal point go? (a) 2.646 (b) 26.46 (c) 2646 (d) 264.6
  28. 28.0.19 × 35 — where does the decimal point go? (a) 66.5 (b) 0.0665 (c) 0.665 (d) 6.65
  29. 29.0.34 × 0.7 — where does the decimal point go? (a) 2.38 (b) 0.238 (c) 0.0238 (d) 0.00238
  30. 30.4.8 × 1.9 — where does the decimal point go? (a) 9.12 (b) 91.2 (c) 0.0912 (d) 0.912
  31. 31.1.4 × 3 — where does the decimal point go? (a) 4.2 (b) 42 (c) 0.42 (d) 0.042
  32. 32.0.28 × 8 — where does the decimal point go? (a) 22.4 (b) 0.0224 (c) 2.24 (d) 0.224
  33. 33.7.9 × 3.7 — where does the decimal point go? (a) 29.23 (b) 0.2923 (c) 292.3 (d) 2.923
  34. 34.3.4 × 29 — where does the decimal point go? (a) 9.86 (b) 98.6 (c) 0.986 (d) 986
  35. 35.0.29 × 38 — where does the decimal point go? (a) 0.1102 (b) 110.2 (c) 1.102 (d) 11.02
  36. 36.0.37 × 3 — where does the decimal point go? (a) 11.1 (b) 0.0111 (c) 0.111 (d) 1.11
  37. 37.0.55 × 11 — where does the decimal point go? (a) 6.05 (b) 60.5 (c) 0.605 (d) 0.0605
  38. 38.8.1 × 0.7 — where does the decimal point go? (a) 5.67 (b) 0.567 (c) 56.7 (d) 0.0567
  39. 39.0.74 × 9 — where does the decimal point go? (a) 0.0666 (b) 6.66 (c) 0.666 (d) 66.6
  40. 40.1.9 × 3.2 — where does the decimal point go? (a) 6.08 (b) 60.8 (c) 0.0608 (d) 0.608

Answer key

  1. 6.24
  2. 6.6
  3. 2.4
  4. 0.672
  5. 0.423
  6. 102.5
  7. 27.95
  8. 144.3
  9. 1.75
  10. 0.882
  11. 83.7
  12. 2.88
  13. 11.47
  14. 1.224
  15. 2.52
  16. 61.2
  17. 318.2
  18. 203.5
  19. 236.8
  20. 0.96
  21. 0.42
  22. 33.6
  23. 13.34
  24. 2.61
  25. 0.162
  26. 1.71
  27. 264.6
  28. 6.65
  29. 0.238
  30. 9.12
  31. 4.2
  32. 2.24
  33. 29.23
  34. 98.6
  35. 11.02
  36. 1.11
  37. 6.05
  38. 5.67
  39. 6.66
  40. 6.08

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