Question

Thực hiện phép tính :

a) 27. 75 + 25.27 - 150

b) 12 :  {390 : |500 - (125 + 35 . 7 )|}

Answer 1

a) \(27\cdot75+25\cdot27-150\)

\(=27\cdot\left(75+25\right)-150\)

\(=27\cdot100-150\)

\(=2700-150\)

\(=2550\)

b) \(12:\left\{390:\left|500-\left(125+35\cdot7\right)\right|\right\}\)

\(=12:\left\{390:\left|500-\left(125+245\right)\right|\right\}\)

\(=12:\left\{390:\left|500-370\right|\right\}\)

\(=12:\left\{390:130\right\}\)

\(=12:3\)

\(=3\)

Answer 2

a) 27.(75+25)-150=27.100-150=2550

Answer 3

a,3900.                     b,4