`5/9` x `23/11` – `5/9` x `1/11 + `5/9`

2 bình luận về “`5/9` x `23/11` – `5/9` x `1/11 + `5/9`”

1. $\dfrac{5}{9}\times \dfrac{23}{11}-\dfrac{5}{9}\times \dfrac{1}{11}+\dfrac{5}{9}\\
   =\dfrac{5}{9}\times \left(\dfrac{23}{11}-\dfrac{1}{11}+1\right)\\
   =\dfrac{5}{9}\times \left(\dfrac{23}{11}-\dfrac{1}{11}+\dfrac{11}{11}\right)\\
   =\dfrac{5}{9}\times \dfrac{33}{11}\\
   =\dfrac{5}{9}\times 3\\
   =\dfrac{5}{3}$

   Trả lời
2. Giải đáp:

   5/9 xx 23/11 – 5/9 xx 1/11 + 5/9

   = 5/9 xx 23/11 – 5/9 xx 1/11 + 5/9 xx 1

   = 5/9 xx (23/11-1/11+1)

   = 5/9 xx (22/11 + 1)

   = 5/9 xx (2+1)

   = 5/9 xx 3

   = 5/3

    

   Trả lời