Fraction Computation Review

Analyze the following problems. In which cases do you need to find a common denominator and in which cases could you cross multiply to find an answer? Explain your thinking.

1. Add. \(\dfrac{3}{4}+\dfrac{2}{3}\)
2. Subtract. \(\dfrac{2}{3}-\dfrac{x}{5}\)
3. Multiply. \(\dfrac{3}{4}\cdot{\dfrac{4}{x}}\)
4. Divide. \(\dfrac{7}{12}\div{\dfrac{1}{3}}\)
5. Solve. \(\dfrac{2}{x}=\dfrac{4}{6}\)

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