## anonymous 5 years ago (-2/5 +1/2=???? can you help? I got 9/10

1. mathteacher1729

Here you have to find the common denominator. The denominator of -2/5 is 5 The denominator of 1/2 is 2 If we multiply: $\frac{-2}{5}\frac{2}{2}$ and $\frac{1}{2}\frac{5}{5}$ THE TRICK HERE IS IN TWO PARTS 1) 2/2 and 5/5 are just fancy ways of representing the number 1. 2) One times any number does not change the number. The benefit is that we now have: $\frac{-4}{10}+\frac{5}{10}=\frac{-4+5}{10}$ So... check your answer... :)

2. Elizabeth

is body here