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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 939 · 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. 1.0.48 × 0.4 — where does the decimal point go? (a) 0.192 (b) 1.92 (c) 0.0192 (d) 0.00192
  2. 2.6.8 × 7 — where does the decimal point go? (a) 47.6 (b) 0.476 (c) 4.76 (d) 476
  3. 3.0.22 × 4 — where does the decimal point go? (a) 0.88 (b) 0.088 (c) 0.0088 (d) 8.8
  4. 4.0.55 × 21 — where does the decimal point go? (a) 115.5 (b) 0.1155 (c) 1.155 (d) 11.55
  5. 5.0.63 × 1.8 — where does the decimal point go? (a) 0.01134 (b) 11.34 (c) 1.134 (d) 0.1134
  6. 6.0.28 × 18 — where does the decimal point go? (a) 0.504 (b) 0.0504 (c) 5.04 (d) 50.4
  7. 7.7.9 × 0.9 — where does the decimal point go? (a) 0.0711 (b) 7.11 (c) 0.711 (d) 71.1
  8. 8.9.9 × 4.8 — where does the decimal point go? (a) 475.2 (b) 47.52 (c) 4.752 (d) 0.4752
  9. 9.0.22 × 1.4 — where does the decimal point go? (a) 0.0308 (b) 3.08 (c) 0.308 (d) 0.00308
  10. 10.0.95 × 23 — where does the decimal point go? (a) 0.2185 (b) 218.5 (c) 2.185 (d) 21.85
  11. 11.7.3 × 37 — where does the decimal point go? (a) 2.701 (b) 270.1 (c) 27.01 (d) 2701
  12. 12.7.5 × 1.9 — where does the decimal point go? (a) 1.425 (b) 0.1425 (c) 142.5 (d) 14.25
  13. 13.0.23 × 4.6 — where does the decimal point go? (a) 0.1058 (b) 1.058 (c) 10.58 (d) 0.01058
  14. 14.0.61 × 26 — where does the decimal point go? (a) 15.86 (b) 0.1586 (c) 1.586 (d) 158.6
  15. 15.0.44 × 0.3 — where does the decimal point go? (a) 0.00132 (b) 0.0132 (c) 1.32 (d) 0.132
  16. 16.5.3 × 23 — where does the decimal point go? (a) 121.9 (b) 12.19 (c) 1219 (d) 1.219
  17. 17.8.4 × 4.1 — where does the decimal point go? (a) 0.3444 (b) 344.4 (c) 3.444 (d) 34.44
  18. 18.3.2 × 0.8 — where does the decimal point go? (a) 2.56 (b) 25.6 (c) 0.256 (d) 0.0256
  19. 19.9.8 × 8 — where does the decimal point go? (a) 7.84 (b) 784 (c) 78.4 (d) 0.784
  20. 20.0.48 × 0.2 — where does the decimal point go? (a) 0.00096 (b) 0.96 (c) 0.096 (d) 0.0096
  21. 21.0.92 × 47 — where does the decimal point go? (a) 432.4 (b) 0.4324 (c) 43.24 (d) 4.324
  22. 22.0.38 × 0.8 — where does the decimal point go? (a) 0.0304 (b) 0.00304 (c) 3.04 (d) 0.304
  23. 23.6.4 × 4.4 — where does the decimal point go? (a) 0.2816 (b) 2.816 (c) 28.16 (d) 281.6
  24. 24.8.8 × 2.7 — where does the decimal point go? (a) 23.76 (b) 2.376 (c) 0.2376 (d) 237.6
  25. 25.1.2 × 2 — where does the decimal point go? (a) 0.24 (b) 0.024 (c) 2.4 (d) 24
  26. 26.7.5 × 11 — where does the decimal point go? (a) 82.5 (b) 0.825 (c) 825 (d) 8.25
  27. 27.2.9 × 7 — where does the decimal point go? (a) 0.203 (b) 2.03 (c) 203 (d) 20.3
  28. 28.9.4 × 2.1 — where does the decimal point go? (a) 0.1974 (b) 197.4 (c) 1.974 (d) 19.74
  29. 29.7.8 × 24 — where does the decimal point go? (a) 1872 (b) 187.2 (c) 1.872 (d) 18.72
  30. 30.6.7 × 1.1 — where does the decimal point go? (a) 73.7 (b) 7.37 (c) 0.0737 (d) 0.737
  31. 31.0.39 × 0.6 — where does the decimal point go? (a) 0.00234 (b) 2.34 (c) 0.0234 (d) 0.234
  32. 32.0.91 × 2 — where does the decimal point go? (a) 18.2 (b) 0.182 (c) 0.0182 (d) 1.82
  33. 33.0.21 × 17 — where does the decimal point go? (a) 0.357 (b) 3.57 (c) 0.0357 (d) 35.7
  34. 34.8.8 × 8 — where does the decimal point go? (a) 704 (b) 7.04 (c) 0.704 (d) 70.4
  35. 35.6.3 × 0.3 — where does the decimal point go? (a) 18.9 (b) 1.89 (c) 0.189 (d) 0.0189
  36. 36.0.61 × 4.6 — where does the decimal point go? (a) 0.02806 (b) 0.2806 (c) 2.806 (d) 28.06
  37. 37.6.8 × 4 — where does the decimal point go? (a) 27.2 (b) 272 (c) 2.72 (d) 0.272
  38. 38.0.22 × 26 — where does the decimal point go? (a) 57.2 (b) 5.72 (c) 0.0572 (d) 0.572
  39. 39.5.1 × 0.5 — where does the decimal point go? (a) 0.0255 (b) 2.55 (c) 25.5 (d) 0.255
  40. 40.0.63 × 42 — where does the decimal point go? (a) 0.2646 (b) 264.6 (c) 26.46 (d) 2.646

Answer key

  1. 0.192
  2. 47.6
  3. 0.88
  4. 11.55
  5. 1.134
  6. 5.04
  7. 7.11
  8. 47.52
  9. 0.308
  10. 21.85
  11. 270.1
  12. 14.25
  13. 1.058
  14. 15.86
  15. 0.132
  16. 121.9
  17. 34.44
  18. 2.56
  19. 78.4
  20. 0.096
  21. 43.24
  22. 0.304
  23. 28.16
  24. 23.76
  25. 2.4
  26. 82.5
  27. 20.3
  28. 19.74
  29. 187.2
  30. 7.37
  31. 0.234
  32. 1.82
  33. 3.57
  34. 70.4
  35. 1.89
  36. 2.806
  37. 27.2
  38. 5.72
  39. 2.55
  40. 26.46

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