Robin

Robin needs 3 1/4 meters long of red lace, 5 meters of yellow lace, and 2 1/2 meters of pink lace for her project. How many laces does she need?

Correct answer:

x =  10 ³⁄₄ = 43/4 m

Step-by-step explanation:

$$\begin{gathered} a=3\frac{1}{4}=3+\frac{1}{4}=\frac{3\cdot 4+1}{4}=\frac{12+1}{4}=\frac{13}{4}=3.25\text{m} \\ b=5\text{m} \\ c=2\frac{1}{2}=2+\frac{1}{2}=\frac{2\cdot 2+1}{2}=\frac{4+1}{2}=\frac{5}{2}=2.5\text{m} \\ x=a+b+c=\frac{13}{4}+5+\frac{5}{2}=\frac{43}{4}\text{m}=10\frac{3}{4}\text{m}=10.75\text{m} \end{gathered}$$

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