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Calculate the sum in the numerator.

Mathematics

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10. Work out 3.6+11.20.144\frac{3.6 + 11.2}{0.144}

  1. Calculate the sum in the numerator.

    3.6+11.2=14.83.6 + 11.2 = 14.8
  2. Divide the result by the denominator.

    14.80.144\frac{14.8}{0.144}

    To simplify the division, multiply both the numerator and the denominator by 1000 to remove the decimals:

    14.8×10000.144×1000=14800144\frac{14.8 \times 1000}{0.144 \times 1000} = \frac{14800}{144}
  3. Perform the division.

    14800144=102.777...\frac{14800}{144} = 102.777...

    Rounding to four decimal places:

    102.777...≈102.7778102.777... \approx 102.7778

    The value is 102.7778\boxed{\text{102.7778}}.

    11. Use a table to look for a square root of 0.8236

    To find the square root of 0.8236 using a table, you would locate 0.8236 in the table's appropriate column (e.g., for square roots of numbers between 0 and 1).
    Calculating the square root directly:

    0.8236≈0.9075241\sqrt{0.8236} \approx 0.9075241

    Rounding to four decimal places, as is common for table values:

    0.8236≈0.9075\sqrt{0.8236} \approx 0.9075

    The square root of 0.8236 is approximately 0.9075\boxed{\text{0.9075}}.

    12. Evaluate: 38\frac{3}{8} of [735−13(114+313×225)]\left[7\frac{3}{5} - \frac{1}{3}\left(1\frac{1}{4} + 3\frac{1}{3} \times 2\frac{2}{5}\right)\right]

  4. Convert all mixed numbers to improper fractions.

    735=7×5+35=3857\frac{3}{5} = \frac{7 \times 5 + 3}{5} = \frac{38}{5} 114=1×4+14=541\frac{1}{4} = \frac{1 \times 4 + 1}{4} = \frac{5}{4} 313=3×3+13=1033\frac{1}{3} = \frac{3 \times 3 + 1}{3} = \frac{10}{3} 225=2×5+25=1252\frac{2}{5} = \frac{2 \times 5 + 2}{5} = \frac{12}{5}

    Substitute these into the expression:

    38×[385−13(54+103×125)]\frac{3}{8} \times \left[\frac{38}{5} - \frac{1}{3}\left(\frac{5}{4} + \frac{10}{3} \times \frac{12}{5}\right)\right]
  5. Perform the multiplication inside the innermost parentheses.

    103×125=10×123×5=12015=8\frac{10}{3} \times \frac{12}{5} = \frac{10 \times 12}{3 \times 5} = \frac{120}{15} = 8
  6. Perform the addition inside the innermost parentheses.

    54+8=54+324=374\frac{5}{4} + 8 = \frac{5}{4} + \frac{32}{4} = \frac{37}{4}

    The expression now becomes:

    38×[385−13(374)]\frac{3}{8} \times \left[\frac{38}{5} - \frac{1}{3}\left(\frac{37}{4}\right)\right]
  7. Perform the multiplication 13×374\frac{1}{3} \times \frac{37}{4}.

    13×374=3712\frac{1}{3} \times \frac{37}{4} = \frac{37}{12}

    The expression now becomes:

    38×[385−3712]\frac{3}{8} \times \left[\frac{38}{5} - \frac{37}{12}\right]
  8. Perform the subtraction inside the square brackets.

    Find a common denominator for 5 and 12, which is 60.

    385−3712=38×125×12−37×512×5=45660−18560=456−18560=27160\frac{38}{5} - \frac{37}{12} = \frac{38 \times 12}{5 \times 12} - \frac{37 \times 5}{12 \times 5} = \frac{456}{60} - \frac{185}{60} = \frac{456 - 185}{60} = \frac{271}{60}

    The expression now becomes:

    38×27160\frac{3}{8} \times \frac{271}{60}
  9. Perform the final multiplication.

    38×27160=3×2718×60\frac{3}{8} \times \frac{271}{60} = \frac{3 \times 271}{8 \times 60}

    We can simplify by dividing 3 and 60 by their common factor, 3:

    1×2718×20=271160\frac{1 \times 271}{8 \times 20} = \frac{271}{160}

    As a mixed number:

    11111601\frac{111}{160}

    The evaluated expression is 271160\boxed{\frac{271}{160}} or 1111160\boxed{1\frac{111}{160}}.

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