3².22-3².19

=3².(22-19)

=9.2

=18

Đáp Án

a)52:4x3+2x52

=13x3+2x52

=39+104

=143

b)5x42-18:32

=100-0.5625

=99.4375

của bạn nha

T là ng hỏi mà>

\(3^3.18-3^3.12=3^3.2.3^2-3^3.2^2.3=3^5.2-3^4.2^2=3^4.2.\left(3-2\right)=3^4.2=162\\ \)

\(3^3.18-3^3.12=3^3.\left(18-12\right)=27.6=162\)

b) 9 . 22 . 13 + 87 . 39 = 198 . 13 + 87 . 3 . 13 = 198 . 13 + 261 . 13 = 13 . (198 + 261) = 13 . 459 = 5967

c) 4 . 5² - 81 : 3² = 4 . 25 - 81 : 9 = 100 - 9 = 91

d) 3² . 22 - 33 . 19 = 9 . 22 - 33 . 19 = 198 - 627 = - 429

e) 24 . 5 - [ 131 - (13 - 4)² ] = 120 - (131 - 9²) = 120 - (131 - 81) = 120 - 50 = 70

g) 100 . { 250 : [ 450 - (4 . 5³ - 2² . 25) ] } = 100 . { 250 : [ 450 - (4 . 125 - 4 .25) ] }

= 100 . [ 250 : (450 - 400) ]

= 100 . (250 : 50)

= 100 . 5

= 500

a) \(4.5^2-81:3^2=4.25-81:9=100-9=91\)

b) \(3^3.23-3^3.19=3^3.\left(23-19\right)=27.4=108\)

c) \(2^4.5-[131-\left(13-4\right)^2]=16.5-\left(131-9^2\right)=80-\left(131-81\right)=80-50=30\)

d) \(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)

\(=100:\left\{250:\left[450-4.\left(125-25\right)\right]\right\}\)

\(=100:\left[250:\left(450-4.100\right)\right]\)

\(=100:\left[250:\left(450-400\right)\right]=100:\left(250:50\right)=100:5=20\)

mình cũng ko bít làm

gíup em vs ạ

100:{250:[450-(4 . 5³-2² . 25 ] }

=100:{250:[450-(500-100)])

=100:{250:[450-400])

=100:{250:50}

=100:5

=20

a. 525

b. 

a. -82

b. 15

\(100\div\left\{250\div\left[450-\left(4\times5^2-2^2\times25\right)\right]\right\}\)

\(=100\div\left\{250\div\left[450-\left(4\times25-4\times25\right)\right]\right\}\)

\(=100\div\left\{250\div\left[450-0\right]\right\}\)

\(=100\div\frac{250}{450}=100\times\frac{450}{250}=180\)

100 : { 250 : [ 450 - ( 4 . 5² - 2² . 25 ) ] }

= 100 : { 250 : [ 450 - ( 4 . 25 - 4 . 25 ) ] }

= 100 : { 250 : [ 450 - 0 ] }

= 100 : { 250 : 450 }

= 100 : \(\frac{5}{9}\)

= 180

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