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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 75 · 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. 1.0.97 × 1.1 — where does the decimal point go? (a) 10.67 (b) 0.1067 (c) 0.01067 (d) 1.067
  2. 2.0.88 × 24 — where does the decimal point go? (a) 21.12 (b) 2.112 (c) 0.2112 (d) 211.2
  3. 3.0.84 × 43 — where does the decimal point go? (a) 0.3612 (b) 361.2 (c) 36.12 (d) 3.612
  4. 4.0.84 × 6 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 0.0504 (d) 50.4
  5. 5.8.9 × 9 — where does the decimal point go? (a) 80.1 (b) 0.801 (c) 8.01 (d) 801
  6. 6.0.16 × 2.1 — where does the decimal point go? (a) 0.00336 (b) 3.36 (c) 0.0336 (d) 0.336
  7. 7.1.9 × 2 — where does the decimal point go? (a) 0.038 (b) 3.8 (c) 38 (d) 0.38
  8. 8.8.7 × 35 — where does the decimal point go? (a) 3.045 (b) 304.5 (c) 3045 (d) 30.45
  9. 9.0.41 × 44 — where does the decimal point go? (a) 0.1804 (b) 1.804 (c) 180.4 (d) 18.04
  10. 10.0.33 × 4 — where does the decimal point go? (a) 1.32 (b) 13.2 (c) 0.132 (d) 0.0132
  11. 11.1.9 × 0.4 — where does the decimal point go? (a) 0.76 (b) 0.0076 (c) 0.076 (d) 7.6
  12. 12.0.24 × 0.3 — where does the decimal point go? (a) 0.72 (b) 0.0072 (c) 0.072 (d) 0.00072
  13. 13.8.9 × 2 — where does the decimal point go? (a) 178 (b) 17.8 (c) 1.78 (d) 0.178
  14. 14.0.84 × 4 — where does the decimal point go? (a) 3.36 (b) 33.6 (c) 0.336 (d) 0.0336
  15. 15.7.2 × 0.6 — where does the decimal point go? (a) 0.0432 (b) 43.2 (c) 4.32 (d) 0.432
  16. 16.0.27 × 0.4 — where does the decimal point go? (a) 1.08 (b) 0.0108 (c) 0.00108 (d) 0.108
  17. 17.9.5 × 49 — where does the decimal point go? (a) 46.55 (b) 4.655 (c) 465.5 (d) 4655
  18. 18.5.3 × 39 — where does the decimal point go? (a) 20.67 (b) 206.7 (c) 2067 (d) 2.067
  19. 19.0.91 × 0.6 — where does the decimal point go? (a) 0.546 (b) 0.00546 (c) 0.0546 (d) 5.46
  20. 20.4.4 × 14 — where does the decimal point go? (a) 61.6 (b) 616 (c) 0.616 (d) 6.16
  21. 21.0.58 × 4.3 — where does the decimal point go? (a) 2.494 (b) 24.94 (c) 0.2494 (d) 0.02494
  22. 22.0.87 × 4.2 — where does the decimal point go? (a) 0.3654 (b) 0.03654 (c) 36.54 (d) 3.654
  23. 23.8.6 × 32 — where does the decimal point go? (a) 2.752 (b) 27.52 (c) 2752 (d) 275.2
  24. 24.0.81 × 0.7 — where does the decimal point go? (a) 5.67 (b) 0.567 (c) 0.0567 (d) 0.00567
  25. 25.0.28 × 8 — where does the decimal point go? (a) 22.4 (b) 0.0224 (c) 2.24 (d) 0.224
  26. 26.0.17 × 7 — where does the decimal point go? (a) 0.119 (b) 0.0119 (c) 11.9 (d) 1.19
  27. 27.1.4 × 3.8 — where does the decimal point go? (a) 53.2 (b) 0.0532 (c) 5.32 (d) 0.532
  28. 28.0.19 × 2 — where does the decimal point go? (a) 0.038 (b) 0.0038 (c) 0.38 (d) 3.8
  29. 29.8.6 × 47 — where does the decimal point go? (a) 404.2 (b) 4.042 (c) 40.42 (d) 4042
  30. 30.0.92 × 3.4 — where does the decimal point go? (a) 3.128 (b) 31.28 (c) 0.3128 (d) 0.03128
  31. 31.0.39 × 15 — where does the decimal point go? (a) 0.0585 (b) 5.85 (c) 0.585 (d) 58.5
  32. 32.7.8 × 0.6 — where does the decimal point go? (a) 0.468 (b) 0.0468 (c) 4.68 (d) 46.8
  33. 33.0.24 × 0.2 — where does the decimal point go? (a) 0.00048 (b) 0.48 (c) 0.0048 (d) 0.048
  34. 34.1.9 × 0.3 — where does the decimal point go? (a) 5.7 (b) 0.57 (c) 0.0057 (d) 0.057
  35. 35.0.82 × 19 — where does the decimal point go? (a) 0.1558 (b) 1.558 (c) 15.58 (d) 155.8
  36. 36.0.58 × 7 — where does the decimal point go? (a) 4.06 (b) 40.6 (c) 0.406 (d) 0.0406
  37. 37.0.38 × 8 — where does the decimal point go? (a) 3.04 (b) 0.0304 (c) 30.4 (d) 0.304
  38. 38.7.5 × 2.7 — where does the decimal point go? (a) 0.2025 (b) 2.025 (c) 202.5 (d) 20.25
  39. 39.5.6 × 26 — where does the decimal point go? (a) 1456 (b) 1.456 (c) 14.56 (d) 145.6
  40. 40.0.85 × 5 — where does the decimal point go? (a) 0.425 (b) 42.5 (c) 4.25 (d) 0.0425

Answer key

  1. 1.067
  2. 21.12
  3. 36.12
  4. 5.04
  5. 80.1
  6. 0.336
  7. 3.8
  8. 304.5
  9. 18.04
  10. 1.32
  11. 0.76
  12. 0.072
  13. 17.8
  14. 3.36
  15. 4.32
  16. 0.108
  17. 465.5
  18. 206.7
  19. 0.546
  20. 61.6
  21. 2.494
  22. 3.654
  23. 275.2
  24. 0.567
  25. 2.24
  26. 1.19
  27. 5.32
  28. 0.38
  29. 404.2
  30. 3.128
  31. 5.85
  32. 4.68
  33. 0.048
  34. 0.57
  35. 15.58
  36. 4.06
  37. 3.04
  38. 20.25
  39. 145.6
  40. 4.25

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