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30÷{175÷[355-(135+37.5)]}
= 30÷{175÷[355-(135+185)]}
= 30÷{175÷[355-320]}
= 30÷{175÷35}
= 30÷5
= 6
![](https://rs.olm.vn/images/avt/0.png?1311)
30÷{175÷[355-(135+37.5)]}
= 30÷{175÷[355-(135+185)]}
= 30÷{175÷[355-320]}
= 30÷{175÷35}
= 30÷5
= 6
30 : { 175 : [ 355 - (135 + 37 . 5) ] }
= 30 : { 175 : [ 355 - 320 ] }
= 30 : { 175 : 35 }
= 30 : 5
= 6
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30 : { 175 : [ 355 - ( 135 + 37 . 5] }
= 30 : { 175 : [ 355 - ( 135 + 185] }
= 30 : [ 175 : ( 355 - 320 ) ]
= 30 : ( 175 : 35 )
= 30 : 5
= 6
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a) 24.5 - [ 131. ( 13 - 4 )2 ]
=120 - [ 131 . 92 ]
=120 - [ 131 . 81 ]
=120 - 10611
= - 10491
b) 100 : {230:[450−(4−53−52.25)]}
= 100 : \(\left\{230:\left[450-\left(4-125-25.25\right)\right]\right\}\)
= \(100:\left\{230:\left[450-\left(4-125-625\right)\right]\right\}\)
= \(100:\left\{230:\left[450-\left(-746\right)\right]\right\}\)
=\(100:\left\{230:1196\right\}\)
= 100 : \(\dfrac{5}{26}\)= 520