\(a,700:\left\{100-\left[40.2-\left(20.5\right):5\right]\right\}\\ =700:\left\{100-\left[80-20\right]\right\}\\ =700:40\\ =\dfrac{35}{2}.\)
Kiểm tra lại dấu phần \(b,\) .
700:{100-[40.2-100:5]}
700:(100-80-20)
700:0
70
a. 700 : { 100 - [ 40 . 2 - ( 20 . 5 ) : 5 ] }
= 700: { 100 - [ 40 . 2 - 100 : 5 ] }
= 700 : { 100 - [ 80-20 ] }
= 700 : { 100 - 60 }
= 700 : 40
= 17.5