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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 759 · 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. 1.0.86 × 2 — where does the decimal point go? (a) 1.72 (b) 0.0172 (c) 17.2 (d) 0.172
  2. 2.0.76 × 0.9 — where does the decimal point go? (a) 0.0684 (b) 0.00684 (c) 6.84 (d) 0.684
  3. 3.7.8 × 18 — where does the decimal point go? (a) 14.04 (b) 140.4 (c) 1.404 (d) 1404
  4. 4.0.71 × 4.8 — where does the decimal point go? (a) 0.03408 (b) 3.408 (c) 0.3408 (d) 34.08
  5. 5.9.7 × 0.4 — where does the decimal point go? (a) 38.8 (b) 0.388 (c) 3.88 (d) 0.0388
  6. 6.2.5 × 23 — where does the decimal point go? (a) 57.5 (b) 575 (c) 0.575 (d) 5.75
  7. 7.0.68 × 3 — where does the decimal point go? (a) 20.4 (b) 2.04 (c) 0.0204 (d) 0.204
  8. 8.1.4 × 9 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 126 (d) 0.126
  9. 9.0.34 × 4 — where does the decimal point go? (a) 0.136 (b) 1.36 (c) 0.0136 (d) 13.6
  10. 10.2.3 × 26 — where does the decimal point go? (a) 0.598 (b) 59.8 (c) 598 (d) 5.98
  11. 11.0.52 × 41 — where does the decimal point go? (a) 213.2 (b) 0.2132 (c) 21.32 (d) 2.132
  12. 12.1.3 × 0.4 — where does the decimal point go? (a) 0.052 (b) 5.2 (c) 0.0052 (d) 0.52
  13. 13.0.44 × 3.7 — where does the decimal point go? (a) 16.28 (b) 0.1628 (c) 0.01628 (d) 1.628
  14. 14.1.4 × 8 — where does the decimal point go? (a) 0.112 (b) 1.12 (c) 11.2 (d) 112
  15. 15.0.89 × 25 — where does the decimal point go? (a) 222.5 (b) 22.25 (c) 2.225 (d) 0.2225
  16. 16.0.44 × 0.2 — where does the decimal point go? (a) 0.088 (b) 0.0088 (c) 0.00088 (d) 0.88
  17. 17.4.6 × 22 — where does the decimal point go? (a) 10.12 (b) 1012 (c) 1.012 (d) 101.2
  18. 18.1.3 × 11 — where does the decimal point go? (a) 14.3 (b) 1.43 (c) 0.143 (d) 143
  19. 19.0.83 × 4 — where does the decimal point go? (a) 0.332 (b) 0.0332 (c) 33.2 (d) 3.32
  20. 20.4.9 × 4.1 — where does the decimal point go? (a) 200.9 (b) 2.009 (c) 20.09 (d) 0.2009
  21. 21.3.3 × 3 — where does the decimal point go? (a) 0.99 (b) 0.099 (c) 9.9 (d) 99
  22. 22.0.37 × 3 — where does the decimal point go? (a) 1.11 (b) 0.0111 (c) 11.1 (d) 0.111
  23. 23.4.4 × 2 — where does the decimal point go? (a) 88 (b) 0.088 (c) 8.8 (d) 0.88
  24. 24.1.8 × 41 — where does the decimal point go? (a) 73.8 (b) 0.738 (c) 738 (d) 7.38
  25. 25.6.4 × 16 — where does the decimal point go? (a) 1024 (b) 10.24 (c) 1.024 (d) 102.4
  26. 26.5.6 × 9 — where does the decimal point go? (a) 5.04 (b) 50.4 (c) 0.504 (d) 504
  27. 27.2.2 × 0.8 — where does the decimal point go? (a) 0.0176 (b) 17.6 (c) 1.76 (d) 0.176
  28. 28.8.3 × 0.7 — where does the decimal point go? (a) 0.581 (b) 58.1 (c) 0.0581 (d) 5.81
  29. 29.6.1 × 7 — where does the decimal point go? (a) 42.7 (b) 0.427 (c) 427 (d) 4.27
  30. 30.0.23 × 22 — where does the decimal point go? (a) 5.06 (b) 0.0506 (c) 50.6 (d) 0.506
  31. 31.9.8 × 4.1 — where does the decimal point go? (a) 0.4018 (b) 4.018 (c) 40.18 (d) 401.8
  32. 32.4.7 × 9 — where does the decimal point go? (a) 42.3 (b) 4.23 (c) 0.423 (d) 423
  33. 33.0.58 × 17 — where does the decimal point go? (a) 0.0986 (b) 0.986 (c) 98.6 (d) 9.86
  34. 34.0.12 × 0.4 — where does the decimal point go? (a) 0.00048 (b) 0.0048 (c) 0.048 (d) 0.48
  35. 35.3.2 × 9 — where does the decimal point go? (a) 288 (b) 0.288 (c) 28.8 (d) 2.88
  36. 36.7.6 × 6 — where does the decimal point go? (a) 0.456 (b) 45.6 (c) 4.56 (d) 456
  37. 37.5.9 × 0.6 — where does the decimal point go? (a) 3.54 (b) 0.354 (c) 0.0354 (d) 35.4
  38. 38.5.6 × 0.3 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.0168 (d) 0.168
  39. 39.0.54 × 6 — where does the decimal point go? (a) 0.324 (b) 0.0324 (c) 32.4 (d) 3.24
  40. 40.0.34 × 0.9 — where does the decimal point go? (a) 0.306 (b) 0.00306 (c) 0.0306 (d) 3.06

Answer key

  1. 1.72
  2. 0.684
  3. 140.4
  4. 3.408
  5. 3.88
  6. 57.5
  7. 2.04
  8. 12.6
  9. 1.36
  10. 59.8
  11. 21.32
  12. 0.52
  13. 1.628
  14. 11.2
  15. 22.25
  16. 0.088
  17. 101.2
  18. 14.3
  19. 3.32
  20. 20.09
  21. 9.9
  22. 1.11
  23. 8.8
  24. 73.8
  25. 102.4
  26. 50.4
  27. 1.76
  28. 5.81
  29. 42.7
  30. 5.06
  31. 40.18
  32. 42.3
  33. 9.86
  34. 0.048
  35. 28.8
  36. 45.6
  37. 3.54
  38. 1.68
  39. 3.24
  40. 0.306

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