Question

A=12:{390[500-(125+35x7)]}

Answer 1

Ta có: A = 12 : {390 : [500 - 370)]}

= 12 : {390 : 130}

=12 : 3

=4 

Answer 2

Ta có: A = 12 : {390 : [500 - 370)]}

= 12 : {390 : 130}

=12 : 3

=4 

Answer 3

A=12:{390:[500-(125+35x7)]}

=12:{390:[500-(125+245)]}

=12:{390:[500-370]

=12:{390:130}

=12:3

=4

Answer 4

A= 12:{390x[500-(125+245)]}

  = 12:[390x130] = 12/50700

  =1/4225

Answer 5

A=12:{390:[500-(125+35x7)]}

A=12:{390:[500-(125+245)]}

A=12:{390:[500-370]}

A=12:{390:130}

A=12:3

A=4