Question

Các bạn giúp mình với câu 1 3/5 - 5/6 câu 2 -5/9 -(-5)/12

Answer 1

Câu 1:

\(\dfrac{3}{5}-\dfrac{5}{6}=\dfrac{18}{30}-\dfrac{25}{30}=\dfrac{18-25}{30}=\dfrac{-7}{30}\) 

Câu 2:

\(\dfrac{-5}{9}-\dfrac{-5}{12}=\dfrac{-20}{36}-\dfrac{-15}{36}=\dfrac{-20-\left(-15\right)}{36}=\dfrac{-5}{36}\)

Answer 2

 1. 3/5-5/6=-7/30

2.\(\dfrac{-5}{9}-\dfrac{-5}{12}=\dfrac{-5}{36}\)

Answer 3

Câu 1: \(1\dfrac{3}{5}-\dfrac{5}{6}=\dfrac{8}{5}-\dfrac{5}{6}=\dfrac{23}{30}\)

Câu 2: \(\dfrac{-5}{9}-\left(\dfrac{-5}{12}\right)=\dfrac{-5}{36}\)