![What is the error in finding the sum given below: \displaystyle{ \begin{align} \frac{3}{10} + \frac{\left ( -1 \right)}{10} &= \frac{3 + 1}{10} \\[0.3 cm] &= \frac{4}{10}\\[0.3 cm] &= \frac{2}{5}....](/_next/image?url=https%3A%2F%2Fimg.multiplicationschart.com%2Fdoc%2F855fd879-2994-445e-97b7-cbc1da285ca5.jpg&w=3840&q=75)
The Error in Finding the Sum of Fractions
As an experienced high school mathematics teacher, I often encounter students struggling with the proper way to add fractions. One common mistake that I've observed is the error in the solution presented below:
``` \displaystyle{ \begin{align