The problem asks to simplify the expression $1\frac{1}{2} + 2\frac{1}{3} \times \frac{3}{4} - \frac{1}{2}$.

ArithmeticFractionsMixed NumbersOrder of OperationsSimplification
2025/4/29

1. Problem Description

The problem asks to simplify the expression 112+213×34121\frac{1}{2} + 2\frac{1}{3} \times \frac{3}{4} - \frac{1}{2}.

2. Solution Steps

First, we convert the mixed numbers to improper fractions:
112=1×2+12=321\frac{1}{2} = \frac{1 \times 2 + 1}{2} = \frac{3}{2}
213=2×3+13=732\frac{1}{3} = \frac{2 \times 3 + 1}{3} = \frac{7}{3}
Now we can rewrite the expression as:
32+73×3412\frac{3}{2} + \frac{7}{3} \times \frac{3}{4} - \frac{1}{2}
Next, we perform the multiplication:
73×34=7×33×4=2112=74\frac{7}{3} \times \frac{3}{4} = \frac{7 \times 3}{3 \times 4} = \frac{21}{12} = \frac{7}{4}
So the expression becomes:
32+7412\frac{3}{2} + \frac{7}{4} - \frac{1}{2}
Now, we find a common denominator, which is 4:
32=3×22×2=64\frac{3}{2} = \frac{3 \times 2}{2 \times 2} = \frac{6}{4}
12=1×22×2=24\frac{1}{2} = \frac{1 \times 2}{2 \times 2} = \frac{2}{4}
The expression becomes:
64+7424\frac{6}{4} + \frac{7}{4} - \frac{2}{4}
Now we perform the addition and subtraction from left to right:
64+74=6+74=134\frac{6}{4} + \frac{7}{4} = \frac{6 + 7}{4} = \frac{13}{4}
13424=1324=114\frac{13}{4} - \frac{2}{4} = \frac{13 - 2}{4} = \frac{11}{4}
Finally, we convert the improper fraction 114\frac{11}{4} to a mixed number:
114=234\frac{11}{4} = 2\frac{3}{4}

3. Final Answer

2342\frac{3}{4}

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