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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 504 · 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. 1.1.3 × 2 — where does the decimal point go? (a) 0.026 (b) 2.6 (c) 0.26 (d) 26
  2. 2.4.5 × 41 — where does the decimal point go? (a) 184.5 (b) 18.45 (c) 1845 (d) 1.845
  3. 3.7.9 × 3.2 — where does the decimal point go? (a) 252.8 (b) 25.28 (c) 2.528 (d) 0.2528
  4. 4.0.96 × 7 — where does the decimal point go? (a) 67.2 (b) 0.672 (c) 6.72 (d) 0.0672
  5. 5.0.41 × 17 — where does the decimal point go? (a) 0.0697 (b) 6.97 (c) 0.697 (d) 69.7
  6. 6.0.59 × 41 — where does the decimal point go? (a) 2.419 (b) 0.2419 (c) 241.9 (d) 24.19
  7. 7.9.7 × 0.5 — where does the decimal point go? (a) 0.0485 (b) 4.85 (c) 0.485 (d) 48.5
  8. 8.0.19 × 33 — where does the decimal point go? (a) 0.0627 (b) 62.7 (c) 6.27 (d) 0.627
  9. 9.1.2 × 6 — where does the decimal point go? (a) 0.72 (b) 7.2 (c) 0.072 (d) 72
  10. 10.4.6 × 23 — where does the decimal point go? (a) 105.8 (b) 1058 (c) 1.058 (d) 10.58
  11. 11.0.53 × 0.9 — where does the decimal point go? (a) 0.477 (b) 0.00477 (c) 0.0477 (d) 4.77
  12. 12.2.7 × 8 — where does the decimal point go? (a) 0.216 (b) 216 (c) 2.16 (d) 21.6
  13. 13.5.6 × 2 — where does the decimal point go? (a) 0.112 (b) 112 (c) 11.2 (d) 1.12
  14. 14.0.61 × 6 — where does the decimal point go? (a) 36.6 (b) 0.366 (c) 3.66 (d) 0.0366
  15. 15.5.3 × 0.4 — where does the decimal point go? (a) 0.0212 (b) 21.2 (c) 2.12 (d) 0.212
  16. 16.5.6 × 4 — where does the decimal point go? (a) 0.224 (b) 22.4 (c) 2.24 (d) 224
  17. 17.0.94 × 43 — where does the decimal point go? (a) 4.042 (b) 404.2 (c) 0.4042 (d) 40.42
  18. 18.0.14 × 46 — where does the decimal point go? (a) 6.44 (b) 0.0644 (c) 64.4 (d) 0.644
  19. 19.0.16 × 41 — where does the decimal point go? (a) 0.0656 (b) 65.6 (c) 6.56 (d) 0.656
  20. 20.4.4 × 3.9 — where does the decimal point go? (a) 1.716 (b) 171.6 (c) 0.1716 (d) 17.16
  21. 21.0.72 × 11 — where does the decimal point go? (a) 0.792 (b) 7.92 (c) 79.2 (d) 0.0792
  22. 22.4.9 × 3 — where does the decimal point go? (a) 1.47 (b) 14.7 (c) 147 (d) 0.147
  23. 23.4.2 × 0.3 — where does the decimal point go? (a) 0.0126 (b) 12.6 (c) 0.126 (d) 1.26
  24. 24.0.97 × 0.3 — where does the decimal point go? (a) 2.91 (b) 0.00291 (c) 0.0291 (d) 0.291
  25. 25.1.4 × 16 — where does the decimal point go? (a) 2.24 (b) 0.224 (c) 22.4 (d) 224
  26. 26.2.7 × 17 — where does the decimal point go? (a) 4.59 (b) 45.9 (c) 0.459 (d) 459
  27. 27.2.8 × 2 — where does the decimal point go? (a) 0.56 (b) 0.056 (c) 5.6 (d) 56
  28. 28.3.2 × 4 — where does the decimal point go? (a) 128 (b) 1.28 (c) 12.8 (d) 0.128
  29. 29.1.2 × 24 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 28.8 (d) 288
  30. 30.0.99 × 0.2 — where does the decimal point go? (a) 0.198 (b) 1.98 (c) 0.00198 (d) 0.0198
  31. 31.3.1 × 3.1 — where does the decimal point go? (a) 9.61 (b) 0.0961 (c) 0.961 (d) 96.1
  32. 32.9.8 × 2.6 — where does the decimal point go? (a) 25.48 (b) 0.2548 (c) 2.548 (d) 254.8
  33. 33.6.8 × 0.7 — where does the decimal point go? (a) 4.76 (b) 0.0476 (c) 47.6 (d) 0.476
  34. 34.5.8 × 17 — where does the decimal point go? (a) 98.6 (b) 0.986 (c) 986 (d) 9.86
  35. 35.3.9 × 42 — where does the decimal point go? (a) 16.38 (b) 1638 (c) 163.8 (d) 1.638
  36. 36.7.1 × 1.9 — where does the decimal point go? (a) 1.349 (b) 0.1349 (c) 134.9 (d) 13.49
  37. 37.0.51 × 3.8 — where does the decimal point go? (a) 0.01938 (b) 19.38 (c) 1.938 (d) 0.1938
  38. 38.0.44 × 1.8 — where does the decimal point go? (a) 0.792 (b) 0.00792 (c) 0.0792 (d) 7.92
  39. 39.0.53 × 13 — where does the decimal point go? (a) 0.689 (b) 6.89 (c) 0.0689 (d) 68.9
  40. 40.0.64 × 7 — where does the decimal point go? (a) 44.8 (b) 4.48 (c) 0.0448 (d) 0.448

Answer key

  1. 2.6
  2. 184.5
  3. 25.28
  4. 6.72
  5. 6.97
  6. 24.19
  7. 4.85
  8. 6.27
  9. 7.2
  10. 105.8
  11. 0.477
  12. 21.6
  13. 11.2
  14. 3.66
  15. 2.12
  16. 22.4
  17. 40.42
  18. 6.44
  19. 6.56
  20. 17.16
  21. 7.92
  22. 14.7
  23. 1.26
  24. 0.291
  25. 22.4
  26. 45.9
  27. 5.6
  28. 12.8
  29. 28.8
  30. 0.198
  31. 9.61
  32. 25.48
  33. 4.76
  34. 98.6
  35. 163.8
  36. 13.49
  37. 1.938
  38. 0.792
  39. 6.89
  40. 4.48

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