7\\frac{2}{4}+7\\frac{2}{4}+7\\frac{2}{4}+7\\frac{2}{4}

Explanation:

Step1: Convert mixed - numbers to improper fractions

$7\frac{2}{4}=\frac{7\times4 + 2}{4}=\frac{28+2}{4}=\frac{30}{4}$ So the expression becomes $\frac{30}{4}+\frac{30}{4}+\frac{30}{4}+\frac{30}{4}$.

Step2: Use the rule of adding fractions with the same denominator

$\frac{30}{4}+\frac{30}{4}+\frac{30}{4}+\frac{30}{4}=\frac{30 + 30+30+30}{4}$.

Step3: Calculate the numerator

$30+30+30+30 = 120$. So the fraction is $\frac{120}{4}$.

Step4: Simplify the fraction

$\frac{120}{4}=30$.

Answer:

$30$