nhầm  28:4

tự tính đi dễ mà

b: \(=12\left(35\cdot173+27\right)\)

\(=12\cdot6082=72984\)

có j đó sai 

Giải: (^ là mũ)

a) 3^8 : 3^4 + 2^2 . 2^3

= 6561 : 81 + 4 . 8

= 81 + 32

= 113

Mấy câu sau bn làm tương tự nhé!

b: \(=2^{12}\cdot3^4\cdot\dfrac{3^{10}}{3^{12}\cdot2^{12}}=3^2=9\)

c: \(=\dfrac{7^2\cdot3^2\cdot7\cdot2\cdot5^3}{5^3\cdot7^3\cdot2\cdot3}=\dfrac{3^2}{3}=3\)

d: \(=\dfrac{5^3\cdot3^6\cdot5^4\cdot2^8\cdot3^{16}\cdot2^2}{\left(2^2\cdot3^2\cdot5\right)^5}=\dfrac{5^{10}\cdot3^{22}\cdot2^{10}}{2^{10}\cdot3^{10}\cdot5^5}=3^{12}\cdot5^5\)

a) 3⁸ : 3⁴ + 2² x 2³ =  113

b) 3 x 4² - 2 . 3 = 42

c) 4⁶ . 3⁴ . 9⁵ : 6¹² = 9

d) 21² . 14 . 125 : 35³ . 6 = 108

e) 45³ . 20⁴ .18² : 180⁵ = 25

#BạcHà#

bn ơi ghi cả cách làm nữa bn 

ai lm lun cách làm mk sẽ k cho 2 k lun

a: Ta có: \(\frac{36^{10}\cdot14\cdot126}{35^5\cdot6}\)

\(=\frac{\left(2^2\cdot3^2\right)^{10}\cdot2\cdot7\cdot2\cdot3^2\cdot7}{\left(7\cdot5\right)^5\cdot2\cdot3}\)

\(=\frac{2^{20}\cdot3^{20}\cdot3^2\cdot2^2\cdot7^2}{7^5\cdot5^7\cdot2\cdot3}2^{21}\cdot\frac{3^{21}}{7^3}\)

b: \(\frac{21^2\cdot14\cdot126}{35^5\cdot6}\)

\(=\frac{7^2\cdot3^2\cdot2\cdot7\cdot2\cdot3^2\cdot7}{7^5\cdot5^5\cdot3\cdot2}=\frac{7^4\cdot3^4\cdot2^2}{7^5\cdot5^5\cdot3\cdot2}=\frac{2\cdot3^3}{7\cdot5^5}\)

c: \(\frac{4^9\cdot36+64^4}{100\cdot16^4}\)

\(=\frac{2^{18}\cdot2^2\cdot3^2+\left(2^6\right)^4}{2^2\cdot5^2\cdot\left(2^4\right)^4}=\frac{2^{20}\cdot3^2+2^{24}}{2^2\cdot5^2\cdot2^{16}}\)

\(=\frac{2^{20}\left(3^2+2^4\right)}{2^{18}\cdot5^2}=2^2=4\)