Question

1 . tính :

27 . 75 + 25 . 27 - 150

20 - [ 30 - ( 5 - 1 )² ]

Answer 1

27 . 75 + 25 . 27 - 150

= 27.(75+25)-150

= 27.100-150

= 2700 - 150

= 2550

20 - [ 30 - ( 5 - 1 )² ]

= 20 -[30-4² ]

= 20 - ( 14 )

= 6

Answer 2

27 . 75 + 25 . 27 - 150

= 27.(75+25)-150

= 27.100-150

= 2700 - 150

= 2550

20 - [ 30 - ( 5 - 1 )² ]

= 20 -[30-4² ]

= 20 - ( 14 )

= 6