Solve a different way: evaluate 4 1/2 ÷ 1 1/3 + 2 1/3 - 3/4

Mathematics

ScanSolve AI Answer

Answer

423244 \frac{23}{24}

Step-by-step solution

4 steps

To evaluate the expression 412÷113+213−344 \frac{1}{2} \div 1 \frac{1}{3} + 2 \frac{1}{3} - \frac{3}{4}, we will follow the order of operations (PEMDAS/BODMAS): Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

The final answer is 42324\boxed{4 \frac{23}{24}}.

Here's a step-by-step solution:

  1. Convert all mixed numbers to improper fractions

    • 412=(4×2)+12=8+12=924 \frac{1}{2} = \frac{(4 \times 2) + 1}{2} = \frac{8 + 1}{2} = \frac{9}{2}
    • 113=(1×3)+13=3+13=431 \frac{1}{3} = \frac{(1 \times 3) + 1}{3} = \frac{3 + 1}{3} = \frac{4}{3}
    • 213=(2×3)+13=6+13=732 \frac{1}{3} = \frac{(2 \times 3) + 1}{3} = \frac{6 + 1}{3} = \frac{7}{3}

    The expression becomes:
    92÷43+73−34\frac{9}{2} \div \frac{4}{3} + \frac{7}{3} - \frac{3}{4}

  2. Perform the division

    To divide by a fraction, multiply by its reciprocal.
    92÷43=92×34=9×32×4=278\frac{9}{2} \div \frac{4}{3} = \frac{9}{2} \times \frac{3}{4} = \frac{9 \times 3}{2 \times 4} = \frac{27}{8}

    The expression now is:
    278+73−34\frac{27}{8} + \frac{7}{3} - \frac{3}{4}

  3. Perform addition and subtraction from left to right.

    First, find a common denominator for 8, 3, and 4. The least common multiple (LCM) of 8, 3, and 4 is 24.

    Convert each fraction to have a denominator of 24:

    • 278=27×38×3=8124\frac{27}{8} = \frac{27 \times 3}{8 \times 3} = \frac{81}{24}
    • 73=7×83×8=5624\frac{7}{3} = \frac{7 \times 8}{3 \times 8} = \frac{56}{24}
    • 34=3×64×6=1824\frac{3}{4} = \frac{3 \times 6}{4 \times 6} = \frac{18}{24}

    Substitute these back into the expression:
    8124+5624−1824\frac{81}{24} + \frac{56}{24} - \frac{18}{24}

    Now, perform the addition:
    8124+5624=81+5624=13724\frac{81}{24} + \frac{56}{24} = \frac{81 + 56}{24} = \frac{137}{24}

    Finally, perform the subtraction:
    13724−1824=137−1824=11924\frac{137}{24} - \frac{18}{24} = \frac{137 - 18}{24} = \frac{119}{24}

  4. Convert the improper fraction back to a mixed number

    Divide 119 by 24:
    119÷24=4119 \div 24 = 4 with a remainder of 119−(4×24)=119−96=23119 - (4 \times 24) = 119 - 96 = 23.
    So, 11924=42324\frac{119}{24} = 4 \frac{23}{24}.

Was this helpful?

Try one yourself

A new problem that tests the same skill.

Still stuck on this one?

Ask a follow-up, and the answer starts from this question.

Got a different question?Ask your own question