Peter 2

Peter wanted to have 120 kilograms of fruits.  He picked up ten bags.  Each bag contains 9 1/2 kilograms. How many kilograms does he need more?

Correct answer:

x =  25 kg

Step-by-step explanation:

$$\begin{gathered} m=9\frac{1}{2}=9+\frac{1}{2}=\frac{9\cdot 2+1}{2}=\frac{18+1}{2}=\frac{19}{2}=9.5\text{kg} \\ x=120-10\cdot m=120-10\cdot \frac{19}{2}=25\text{kg} \end{gathered}$$

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