a) 6857 + 3444 : 28
=6857 + 123
=6980
b) 80 - [ 130 - ( 75 - 11 ) ]
=80 - [ 130 - 64 ]
=80 - 66
=14
c) 100 : { 2 x [ 52 - ( 35 - 8 ) ]}
=100 : { 2 x [ 52 - 27 ]}
=100 : { 2 x 25 }
=100 : 50
=2
d) 12 : { 390 : [ 500 - ( 125 + 35 + 7 x 30 ) ] }
=12 : { 390 : [ 500 - ( 125 + 35 + 210 ) ] }
=12 : { 390 : [ 500 - 370 ] }
=12 : { 390 : 130 }
=12 : 3
=4
a) 6857 + 3444 : 28 = 6857 + 123 =6980
b) 80 - [ 130 - ( 75 - 11 ) ] = 80 - ( 130 - 64 ) = 80 - 66 = 14
c) 100 : { 2 x [ 52 - ( 35 - 8 ) ] = 100 : [ 2 x ( 52 - 27 ) ] = 100 : ( 2 x 25 )= 100 : 50 = 2
d) 12 : { 390 : [ 500 - ( 125 + 35 + 7 x 30 ) ] } = 4
Cái này khi nãy tui đi học thêm gặp nhìu dạng như thế này đấy
\(a.6857+3444\div28=6857+123=6980\)
\(b.80-\left[130-\left(75-11\right)\right]=80-\left[130-64\right]=80-66=14\)
\(c.100:\left\{2.\left[52-\left(35-8\right)\right]\right\}=100:\left\{2.\left[52-27\right]\right\}=100:\left\{2.25\right\}=100:50=2\)
\(d.12:\left\{390:\left[500-\left(125+35+7.30\right)\right]\right\}=12:\left\{390\left[500-\left(160+210\right)\right]\right\}=12:\left\{390\left[500-370\right]\right\}\)
\(12:\left\{390:130\right\}=12:3=4\)
a) 6857 + 3444 : 28
= 6857 + 123
= 6980
b) 80 - [130 - (75 - 11)]
= 80 - (130 - 64)
= 80 - 66
= 14
c) 100 : {2 * [52 - (35 - 8)]}
= 100 : [2 * (52 - 27)]
= 100 : (2 * 25)
= 100 : 50
= 2
d) 12 : {390 : [500 - (125 + 35 + 7 * 30)]}
= 12 : {390 : [500 - (125 + 35 + 210)]}
= 12 : [390 : (500 - 370)]
= 12 : (390 : 130)
= 12 : 3
= 4
