Question

[Đoàn Hương Trà]

thuc hien phep tinh

a)205 -[ 1200 -(4^2 -2 x3)^ 3 ]:140

b)[ (25 -2^2 x3 )+ (3^2 x4 +16) ] :5

Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(=205-\left[1200-\left(16-6\right)^3\right]:140\)

\(=205-\left[1200-10^3\right]:140\)

\(=205-\dfrac{200}{140}=205-\dfrac{10}{7}=\dfrac{1425}{7}\)

b: \(=\left[25-4\cdot3+9\cdot4+16\right]:5\)

\(=\left(25-12+36+16\right):5=\dfrac{65}{5}=13\)