Đề em ghi bị thiếu dấu ngoặc nhé, sửa lại đề và giải như vầy:

375 : {32 - [4 + (5.3² - 42)]} - 14

= 375 : {32 - [4 + (5.9 - 42)]} - 14

= 375 : {32 - [4 + (45 - 42)]} - 14

= 375 : [32 - (4 + 3)] - 14

= 375 : (32 - 7) - 14

= 375 : 25 - 14

= 15 - 14

= 1

a) \(142-\left[50-\left(2^3.10-2^3.5\right)\right]\)

= \(142-\left[50-\left(8.10-8.5\right)\right]\)

= \(142-\left[50-8.\left(10-5\right)\right]\)

= \(142-\left[50-8.5\right]\)

= \(142-\left[50-40\right]\)

= \(142-10\)

= \(132\)

b) \(375:\left\{32-\left[4+\left(5.3^2-42\right)\right]\right\}-14\)

= \(375:\left\{32-\left[4+\left(5.9-42\right)\right]\right\}-14\)

= \(375:\left\{32-\left[4+\left(45-42\right)\right]\right\}-14\)

= \(375:\left\{32-\left[4+3\right]\right\}-14\)

= \(375:\left\{32-7\right\}-14\)

= \(375:25-14\)

= \(15-14\)

= \(1\)

Chúc bạn học tốt !!!

a)   142 - [ 50 - ( 2³ . 10 - 2³ . 5 )]

    = 142 - [ 50 - ( 8 . 10 - 8 . 5 )]

    = 142 - [ 50 - ( 80 - 40 )]

    = 142 - [ 50 - 40 ]

    = 142 - 10

   = 132

b)  375 : { 32 - [ 4 + ( 5 . 3² - 42 )]} - 14

    = 375 : { 32 - [ 4 + ( 5 . 9 - 42 )]} - 14

    = 375 : { 32 - [ 4 + ( 45 - 42 )]} - 14

    = 375 : { 32 - [ 4 + 3 ]} - 14

    = 375 : { 32 - 7 } - 14

    = 375 : 25 - 14

    = 15 - 14 

    = 1

\(5.3^2-32:4^2=43\)

=5.9-32:16

=45-2

=43

A.x=11

B.=47

\(a,\Rightarrow7\left(x-5\right)=100-58=42\\ \Rightarrow x-5=6\\ \Rightarrow x=11\\ b,=5\cdot9-2^5:2^4=45-2=43\)

\(375\div\left\{32-\left[4+\left(5\times3^2-42\right)\right]\right\}-14\)​

\(=375\div\left\{32-\left[4+3\right]\right\}-14\)

\(=375\div\left\{32-7\right\}-14\)

\(=375\div25-14\)

\(=15-14\)

\(=1\)

Chúc bạn học tốt!!!

\(375\div\left\{32-\left[4+\left(5\times3^2-42\right)\right]\right\}-14\)

= 375 : { 32 - [ 4 + 3 ]} - 14

= 375 : { 32 - 7 } - 14

= 375 : 25 - 14

= 15 - 14

= 1

Chúc bạn học tốt!!!

375 : {32 - [4 + (5×3^2-42]}-14

=375:{32-[4 + (5×9-42]}-14

=375:{32 -[4 + 3 ]}-14

=375 :{32-7} -14

=375:25-14

=15 -14

=1

CHÚC BẠN HỌC TỐT❤❤😊😊

\(375:\left\{32-\left[4+\left(5.32-42\right)\right]\right\}-14\)

\(=375:\left\{32-\left[4+\left(160-42\right)\right]\right\}-14\)

\(=375:\left\{32-\left[4+118\right]\right\}-14\)

\(=375:\left\{32-122\right\}-14\)

\(=375:\left(-90\right)-14\)

\(=\dfrac{-25}{6}-14\)

\(=\dfrac{-109}{6}\)

a) `27 .75 + 25.27 -150`

`=27 xx (75 + 25)-150`

`=27 xx 100-150`

`=2700-150`

`=2550`

b) `142-[50-(2^3 .10-2^3 .5)]`

`=142-[50-2^3 .(10-5)]`

`=142-(50-8 .5)`

`=142-(50-40)`

`=142-10`

`=132`

c) `375:{32-[4+(5.3^2-42)]}-14`

`=375:{32-[4+(45-42)]}-14`

`=375:[32-(4+3)]-14`

`=375: 25 -14`

`=15-14`

`=1`

a. 27 . 75 + 25 . 27 - 150

= 27. (75 + 25) - 150

= 27 . 100 - 150

= 2700 - 150

= 2550

b. 142 - [50 - (2³.10 - 2³.5)]

= 142 - [50 - (8 . 10 - 8 . 5)]

= 142 - {50 - [8 . (10 - 5)]} 

= 142 - (50 - 40)

= 142 - 10

= 132

c. 375 : {32 – [ 4 + (5. 3² – 42)]} – 14

= 375 : {32 – [ 4 + (5. 9 – 42)]} – 14

= 375 : {32 – [ 4 + (45 – 42)]} – 14

= 375 : {32 – [ 4 + 3]} – 14

= 375 : {32 –7} – 14

= 375 : 25 - 14

= 15 - 14

= 1

a: Ta có: \(142-\left[50-\left(2^3\cdot10-2^3\cdot5\right)\right]\)

\(=142-\left[50-80+40\right]\)

=142-10

=132

a. 142 - [50-(2³.10-2³.5)]

= 142 - [ 50 - ( 8 . 10 - 8 . 5 )]

= 142 - [ 50 - ( 80 - 40 )]

= 142 - [ 50 - 40 ]

= 142 - 10 = 132

b. 375 : { 32[ 4+(5.3² - 42 )]} - 14

= 375 : { 32[4+(5.9 - 42 )]} - 14

= 375 : { 32[4 + ( 45 - 42 )]} - 14

= 375 : {32[4+3]} - 14

= 375 : 224 - 14

c.{210 : [ 16+3.(6+3.2^2)]} - 3

= {210 : [ 16 + 3.(6+3.4)]} - 3

= { 210 :[16+3.(6+12)]}-3

= {210 : [ 16+3.18)]} - 3

= { 210 : [ 16 + 54]} - 3

= { 210 : 70 } - 3

= 30 - 3 = 27

d.500-{5.[409-(2^3 . 3-21^2)] - 1724}

= 500-{5.[409-(8 . 63 - 21^2] - 1724}

= 500 - { 5.[409- (504 -  441) - 1724}

= 500 -{ 5.[ 409 - 63 ] - 1724}

= 500 - { 5.346 - 1724}

= 500 - { 1720 - 1724 }

= 500 - 6 

= 494