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 :

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

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

   = $\dfrac{4}{5}$ + $\dfrac{-36}{30}$

   = $\dfrac{4}{5}$ + $\dfrac{-6}{5}$

   = $\dfrac{-2}{5}$

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

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

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

   = $\dfrac{2}{4}$ – $\dfrac{8}{4}$

   = $\dfrac{-6}{4}$  = $\dfrac{-3}{2}$

   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