30 :{ 175 :[ 355 - ( 135 + 37. 5] }
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\(30\div\left\{175\div\left[355-\left(135+37.5\right)\right]\right\}\)
\(=\)\(30\div\left\{175\div\left[355-\left(135+185\right)\right]\right\}\)
\(=\)\(30\div\left\{175\div\left[355-320\right]\right\}\)
\(=\)\(30\div\left\{175\div35\right\}\)
\(=\)\(30\div5\)
\(=\)\(6\)
=30:{175:[355-(135+185)]}
=30:{175:[355-320]}
=30:{175:35}
=30:5
=6
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1) 100 : { 250 : [ 450 - ( 4 x 53 - 22 x 25 ) ] }
= 100 : { 250 : [ 450 - ( 4 x 125 - 4 x 25 ) ] }
= 100 : { 250 : [ 450 - ( 500 - 100 ) ] }
= 100 : [ 250 : ( 450 - 400 ) ]
= 100 : ( 250 : 50 )
= 100 : 5
= 20
2) 30 : { 175 : [ 355 - ( 135 + 37 x 5 ) ] }
= 30 : { 175 : [ 355 - ( 135 + 185 ) ] }
= 30 : [ 175 : ( 355 - 320 ) ]
= 30 : ( 175 : 35 )
= 30 : 5
= 6
chúc bạn học giỏi
1) 100 : { 250 : [ 450 - ( 4 x 53 - 22 x 25 ) ] }
= 100 : { 250 : [ 450 - ( 4 x 125 - 4 x 25 ) ] }
= 100 : { 250 : [ 450 - ( 500 - 100 ) ] }
= 100 : [ 250 : ( 450 - 400 ) ]
= 100 : ( 250 : 50 )
= 100 : 5
= 20
2) 30 : { 175 : [ 355 - ( 135 + 37 x 5 ) ] }
= 30 : { 175 : [ 355 - ( 135 + 185 ) ] }
= 30 : [ 175 : ( 355 - 320 ) ]
= 30 : ( 175 : 35 )
= 30 : 5
= 6
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
30 : { 175 : [ 355 - ( 135 + 37 . 5] }
= 30 : { 175 : [ 355 - ( 135 + 185] }
= 30 : [ 175 : ( 355 - 320 ) ]
= 30 : ( 175 : 35 )
= 30 : 5
= 6