Question

-47  . 69 + 31 . (-47) - (-155) + 5 . (\(-3^2\)) 

tính

Answer 1

-47 . 69 + 31 . ( -47 ) - ( -155 ) + 5 . ( -3²)

= -47. ( 69 + 31 ) +155 + 5. ( -9 )

= -47 . 100 + 155 -45

= -4700 + 155 + -45

= -4950

Answer 2

-47.69+31.(-47)-(-155)+5.(3²)

=-47.(69+31)-(-155)+5.9

=47.100-(-155)+45

=4700-(-110)

=4810