Pizza party

At a pizza party, Diego and his friends ate one and one-fourth cheese pizza and three-eighths pepperoni pizzas. How much pizza did they eat in all?

Correct answer:

x =  1 ⁵⁄₈ = 13/8

Step-by-step explanation:

$$\begin{gathered} a=1\frac{1}{4}=1+\frac{1}{4}=\frac{1\cdot 4+1}{4}=\frac{4+1}{4}=\frac{5}{4}=1\frac{1}{4}=1.25 \\ b=\frac{3}{8}=0.375 \\ x=a+b=\frac{5}{4}+\frac{3}{8}=\frac{10}{8}+\frac{3}{8}=\frac{10+3}{8}=\frac{13}{8}=1\frac{5}{8}=1.625 \end{gathered}$$

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