tính 4/5+(-7/6- 1/30 [2/4+(-5/3).6/5

2 bình luận về “tính 4/5+(-7/6- 1/30 [2/4+(-5/3).6/5”

1. ⇒Giải đáp :

   $a.$ ${\displaystyle \frac{4}{5}}$ + ( ${\displaystyle \frac{-7}{6}}$ – ${\displaystyle \frac{1}{30}}$ )

   = ${\displaystyle \frac{4}{5}}$ + ( ${\displaystyle \frac{-35}{30}}$ – ${\displaystyle \frac{1}{30}}$ )

   = ${\displaystyle \frac{4}{5}}$ + ${\displaystyle \frac{-36}{30}}$

   = ${\displaystyle \frac{4}{5}}$ + ${\displaystyle \frac{-6}{5}}$

   = ${\displaystyle \frac{-2}{5}}$

   $b.$ [ ${\displaystyle \frac{2}{4}}$ + ( ${\displaystyle \frac{-5}{3}}$ x ${\displaystyle \frac{6}{5}}$ )

   = ( ${\displaystyle \frac{2}{4}}$ + ( ${\displaystyle \frac{-30}{15}}$ ) 

   = ${\displaystyle \frac{2}{4}}$  + ( ${\displaystyle \frac{-2}{b}}$ )

   = ${\displaystyle \frac{2}{4}}$ – ${\displaystyle \frac{8}{4}}$

   = ${\displaystyle \frac{-6}{4}}$  = ${\displaystyle \frac{-3}{2}}$

   Trả lời
2. a) 4/5+(-7/6-1/30)

   =4/5+(-35/30-1/30)

   =4/5+(-36/30)

   =4/5+(-6/5)

   =4/5-6/5

   =-2/5

   —————

   b) 2/4+(-5/3) . 6/5

   =2/4+(-30/15)

   =2/4+(-2)

   =2/4-2

   =2/4-8/4

   =-6/4

   =-3/2

   ~~Hok tốt~~

    

   Trả lời