Question

2³-5³:5²+12×2²
5[(85-35:7):8+90] -50

Answer 1

`a, = 8 - 5 + 12 xx 4`

`= 3 + 48`

`= 51`

`b, = 5 . [80 : 8 + 90]-50`

`= 5 .100 - 50`

`= 500 - 50`

`= 450`

Answer 2

Đề bài B.
=5×(50:7:8+90)−50
=5×(50:7:98)−50
=(5×50:7:98)−50
=(250:7:98)−50

 

Answer 3

= 8 - 5 + 12 x 4

= 3 + 48

= 51 

= 5 x [( 85 - 5 )] : 8 + 90 ] - 50

= 5 x [ 80 : 8 + 90 ] - 50

= 5 x 100 - 50 

= 450

Answer 4

a. 2 mũ 3 - 5 mũ 3 : 12 . 2 mũ 2

= 3 + 48

= 51

b. 5 . [( 85 - 35 : 7 ) : 8 + 90 ] - 50 

= 5 . 100 - 50

= 500 - 50

= 450