Fresh chickens

In the market, one stall is selling fresh chickens worth P120 per kilo. A person bought two fresh chickens weighing 1 1/2 and 1 1/4 kilos each. What is the total weight of the two chickens?

Correct answer:

m =  2 ³⁄₄ = 11/4 kg

Step-by-step explanation:

$$\begin{gathered} a=1\frac{1}{2}=1+\frac{1}{2}=\frac{1\cdot 2+1}{2}=\frac{2+1}{2}=\frac{3}{2}=1.5\text{kg} \\ b=1\frac{1}{4}=1+\frac{1}{4}=\frac{1\cdot 4+1}{4}=\frac{4+1}{4}=\frac{5}{4}=1.25\text{kg} \\ m=a+b=\frac{3}{2}+\frac{5}{4}=\frac{6}{4}+\frac{5}{4}=\frac{6+5}{4}=\frac{11}{4}=\frac{11}{4}\text{kg}=2\frac{3}{4}\text{kg}=2.75\text{kg} \end{gathered}$$

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