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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 311 · 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. 1.5.8 × 0.7 — where does the decimal point go? (a) 0.406 (b) 0.0406 (c) 4.06 (d) 40.6
  2. 2.0.56 × 8 — where does the decimal point go? (a) 0.0448 (b) 4.48 (c) 0.448 (d) 44.8
  3. 3.7.8 × 3 — where does the decimal point go? (a) 0.234 (b) 234 (c) 2.34 (d) 23.4
  4. 4.8.9 × 0.6 — where does the decimal point go? (a) 5.34 (b) 0.0534 (c) 0.534 (d) 53.4
  5. 5.0.74 × 3 — where does the decimal point go? (a) 22.2 (b) 0.0222 (c) 0.222 (d) 2.22
  6. 6.0.62 × 13 — where does the decimal point go? (a) 0.806 (b) 0.0806 (c) 8.06 (d) 80.6
  7. 7.0.56 × 2 — where does the decimal point go? (a) 0.0112 (b) 1.12 (c) 0.112 (d) 11.2
  8. 8.0.27 × 2 — where does the decimal point go? (a) 5.4 (b) 0.0054 (c) 0.54 (d) 0.054
  9. 9.0.86 × 49 — where does the decimal point go? (a) 0.4214 (b) 4.214 (c) 421.4 (d) 42.14
  10. 10.0.27 × 23 — where does the decimal point go? (a) 0.621 (b) 0.0621 (c) 62.1 (d) 6.21
  11. 11.5.2 × 2.1 — where does the decimal point go? (a) 0.1092 (b) 109.2 (c) 10.92 (d) 1.092
  12. 12.1.9 × 0.9 — where does the decimal point go? (a) 17.1 (b) 0.0171 (c) 0.171 (d) 1.71
  13. 13.0.62 × 2.9 — where does the decimal point go? (a) 17.98 (b) 1.798 (c) 0.01798 (d) 0.1798
  14. 14.0.65 × 5 — where does the decimal point go? (a) 0.0325 (b) 32.5 (c) 3.25 (d) 0.325
  15. 15.5.8 × 47 — where does the decimal point go? (a) 27.26 (b) 2.726 (c) 2726 (d) 272.6
  16. 16.0.14 × 0.3 — where does the decimal point go? (a) 0.00042 (b) 0.042 (c) 0.42 (d) 0.0042
  17. 17.2.5 × 0.9 — where does the decimal point go? (a) 2.25 (b) 0.225 (c) 0.0225 (d) 22.5
  18. 18.0.59 × 2 — where does the decimal point go? (a) 0.0118 (b) 0.118 (c) 1.18 (d) 11.8
  19. 19.2.2 × 6 — where does the decimal point go? (a) 132 (b) 0.132 (c) 1.32 (d) 13.2
  20. 20.7.3 × 0.3 — where does the decimal point go? (a) 21.9 (b) 0.0219 (c) 2.19 (d) 0.219
  21. 21.4.1 × 0.9 — where does the decimal point go? (a) 36.9 (b) 3.69 (c) 0.0369 (d) 0.369
  22. 22.0.44 × 3.8 — where does the decimal point go? (a) 0.01672 (b) 16.72 (c) 1.672 (d) 0.1672
  23. 23.0.62 × 0.4 — where does the decimal point go? (a) 0.0248 (b) 0.248 (c) 0.00248 (d) 2.48
  24. 24.5.1 × 13 — where does the decimal point go? (a) 6.63 (b) 663 (c) 0.663 (d) 66.3
  25. 25.5.1 × 0.7 — where does the decimal point go? (a) 35.7 (b) 0.0357 (c) 0.357 (d) 3.57
  26. 26.9.5 × 27 — where does the decimal point go? (a) 2565 (b) 256.5 (c) 2.565 (d) 25.65
  27. 27.0.72 × 4.9 — where does the decimal point go? (a) 0.03528 (b) 3.528 (c) 35.28 (d) 0.3528
  28. 28.0.18 × 0.6 — where does the decimal point go? (a) 0.00108 (b) 0.108 (c) 0.0108 (d) 1.08
  29. 29.7.7 × 5 — where does the decimal point go? (a) 0.385 (b) 38.5 (c) 385 (d) 3.85
  30. 30.9.6 × 1.8 — where does the decimal point go? (a) 17.28 (b) 0.1728 (c) 172.8 (d) 1.728
  31. 31.3.5 × 3 — where does the decimal point go? (a) 0.105 (b) 10.5 (c) 105 (d) 1.05
  32. 32.5.9 × 26 — where does the decimal point go? (a) 15.34 (b) 1534 (c) 153.4 (d) 1.534
  33. 33.0.18 × 2 — where does the decimal point go? (a) 3.6 (b) 0.36 (c) 0.0036 (d) 0.036
  34. 34.9.5 × 0.7 — where does the decimal point go? (a) 0.665 (b) 0.0665 (c) 66.5 (d) 6.65
  35. 35.9.3 × 5 — where does the decimal point go? (a) 0.465 (b) 4.65 (c) 465 (d) 46.5
  36. 36.3.2 × 11 — where does the decimal point go? (a) 0.352 (b) 352 (c) 3.52 (d) 35.2
  37. 37.8.9 × 1.4 — where does the decimal point go? (a) 1.246 (b) 0.1246 (c) 124.6 (d) 12.46
  38. 38.0.31 × 44 — where does the decimal point go? (a) 13.64 (b) 0.1364 (c) 136.4 (d) 1.364
  39. 39.0.63 × 7 — where does the decimal point go? (a) 44.1 (b) 0.441 (c) 0.0441 (d) 4.41
  40. 40.0.89 × 4.6 — where does the decimal point go? (a) 4.094 (b) 40.94 (c) 0.4094 (d) 0.04094

Answer key

  1. 4.06
  2. 4.48
  3. 23.4
  4. 5.34
  5. 2.22
  6. 8.06
  7. 1.12
  8. 0.54
  9. 42.14
  10. 6.21
  11. 10.92
  12. 1.71
  13. 1.798
  14. 3.25
  15. 272.6
  16. 0.042
  17. 2.25
  18. 1.18
  19. 13.2
  20. 2.19
  21. 3.69
  22. 1.672
  23. 0.248
  24. 66.3
  25. 3.57
  26. 256.5
  27. 3.528
  28. 0.108
  29. 38.5
  30. 17.28
  31. 10.5
  32. 153.4
  33. 0.36
  34. 6.65
  35. 46.5
  36. 35.2
  37. 12.46
  38. 13.64
  39. 4.41
  40. 4.094

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