Question

[Nguyễn Hương Giang]

a,20 - [ 30 - (5-1)² 
b, 48 . 69 + 31 . 48

Answer 1

[Vũ Lê Ngọc Liên]

a ) 20 - [ 30 - ( 5 - 1 )² ]

= 20 - [ 30 - 4² ]

= 20 - [ 30 - 16 ]

= 20 - 14

= 6

b ) 48 . 69 + 31 . 48

= 48 ( 69 + 31 )

= 48 . 100

= 4800

Nhớ tick cho mik nha !!!