\(36:\left\{180:\left[2\cdot5^2-\left(5^3-3\cdot5\cdot7\right)\right]\right\}\)

\(=36:\left\{180:\left[2\cdot25-\left(125-15\cdot7\right)\right]\right\}\)

\(=36:\left\{180:\left[50-\left(125-105\right)\right]\right\}\)

\(=36:\left[180:\left(50-20\right)\right]\)

\(=36:\left(180:30\right)\)

\(=36:6\)

\(=6\)

\(=\dfrac{36}{180:\left[2\cdot25-5^3+15\cdot7\right]}=\dfrac{36}{180:30}=\dfrac{36}{6}=6\)

2 . 5³ - 36 - 3²

= 2 . 125 - 36 - 9

= 250 - 36 - 9

= 214 - 9

= 205

b) 13 . 3 . 5² + 13 - 25 - 140

= 13 . 3 . 25 + 13 - 25 - 140

= 39 . 25 + 13 - 25 - 140

= 975 + 13 - 25 - 140

= 823

a,2.5³-36:3²

=2.125-36:9

=250-4=246

b,13.75+13.25-140

=13.(75+25)-140

=13.100-140

=1300-140

=1160

c,50-[30-(6-2)²]

=50-[30-4²]

=50-[30-16]

=50-14=36

Câu a =246

Câu b =1160

Câu c =36

Chúc bạn học giỏi nhé!!!

2.5³ - 36 : 3²

= 2 . 125 - 36 : 9

= 250 - 4

= 246

a: \(2^2\cdot5-\dfrac{\left(1^{10}+8\right)}{3^2}\)

\(=4\cdot5-\dfrac{1+8}{3}\)

=20-3

=17

b: \(5^8:5^6+4\left(3^2-1\right)\)

\(=5^2+4\left(9-1\right)\)

=25+4*8

=25+32

=57

c: \(400-\left\{36-20:\left[3^3-\left(8-3\right)\right]\right\}\)

\(=400-36+20:\left[27-5\right]\)

\(=364+\dfrac{20}{22}\)

\(=364+\dfrac{10}{11}=\dfrac{4014}{11}\)

A) 2².5 - (1¹⁰ + 8) : 3²

= 4.5 - (1 + 8) : 9

= 20 - 9 : 9

= 20 - 1

= 19

B) 5⁸ : 5⁶ + 4.(3² - 1)

= 5² + 4.(9 - 1)

= 25 + 4.8

= 25 + 32

= 57

C) 400 - {36 - 20 : [3³ - (8 - 3)]}

= 400 - [36 - 20 : (27 - 5)]

= 400 -(36 - 20 : 22)

= 400 - (36 - 10/11)

= 400 - 386/11

= 4014/11

\(36:3^2-2.5^2\)

\(=36-2.\left(5^2-3^2\right)\)

\(=24.5^0\)

\(=24.5=120\)

cảm ơn bạn

a)\(5^{2x-3}-2\cdot5^2=5^2\cdot3\)

\(5^{2x-3}-2\cdot25=75\)

\(5^{2x-3}-50=75\)

\(5^{2x-3}=125\)

\(125=5^3\)

\(5^3=5^{\left(3+3\right):2}=5^3\Rightarrow x=3\)

Vậy \(x=3\)

b)\(\frac{2}{9}\cdot\left(5x+1\right):2-\frac{1}{18}=\frac{5}{36}\)

\(=\frac{2}{9}\cdot\left(5x+1\right):2=\frac{5}{36}+\frac{1}{18}\)

\(=\frac{2}{9}\cdot\left(5x+1\right)=\frac{7}{36}\cdot2\)

\(5x+1=\frac{7}{18}:\frac{2}{9}\)

\(x=\left(\frac{7}{4}-1\right):5=\frac{3}{20}\)

\(\Rightarrow x=\frac{3}{20}\)

a, \(5^{2x-3}-2.5^2=5^2.3\)

\(\Leftrightarrow5^{2x-3}-2.25=25.3\)

\(\Leftrightarrow5^{2x-3}-50=75\)

\(\Leftrightarrow5^{2x-3}=125\)

\(\Leftrightarrow5^{2x-3}=5^3\)

\(\Leftrightarrow2x-3=3\)

\(\Leftrightarrow2x=6\)

\(\Leftrightarrow x=3\)

b, \(\frac{2}{9}.\left(5x+1\right):2-\frac{1}{18}=\frac{5}{36}\)

\(\Leftrightarrow\frac{2}{9}.\left(5x+1\right):2=\frac{7}{36}\)

\(\Leftrightarrow\frac{2}{9}.\left(5x+1\right)=\frac{7}{36}.2\)

\(\Leftrightarrow\frac{2}{9}.\left(5x+1\right)=\frac{7}{18}\)

\(\Leftrightarrow5x+1=\frac{7}{18}:\frac{2}{9}\)

\(\Leftrightarrow5x+1=\frac{7}{18}.\frac{9}{2}\)

\(\Leftrightarrow5x+1=\frac{7}{4}\)

\(\Leftrightarrow5x=\frac{3}{4}\)

\(\Leftrightarrow x=\frac{3}{4}:5=\frac{3}{4}.\frac{1}{5}=\frac{3}{20}\)

Bạn viết khó hiểu quá!! Bạn viết lại đề bài rõ ràng để mình giải giùm cho.

a , = 123+39-23 =(123-23) +39 =100+39 =139

b, = (64+36).32 = 100.32 =3200

c, =6².4 +5.2(5-1) =6².4 + 40 = 36.4+40 =144+40 +184

d, đề sao sao ấy nhể k rõ đề lm