Bạn ấy lm câu a rùi mik lm 3 câu còn lại nha
\(27^{16}:9^{10}\)
\(=3^{16}\cdot9^{16}:9^{10}\)
\(=9^8\cdot9^6=9^{14}\)
\(125^3:25^4\)
\(=5^3\cdot25^3:25^4\)
\(=5\cdot25\cdot25^3:25^4\)
\(=5\cdot25^4:25^4\)
\(=5\cdot1=5\)
\(24^4:3^4-32^{12}:16^{12}\)
\(=8^4\cdot3^4:3^4-2^{12}\cdot16^{12}:16^{12}\)
\(=8^4-2^{12}\)
\(=4096-4096\)
\(=0\)
\(2^{20}\)\(.15+20^{10}.85\)
=15728640+8,704x1014
=8,704000157x1014
Conan lm phần a hơi dài, ko phải bài nào cx lm theo cách của bạn đc, mik giải cho
\(2^{20}\cdot15+20^{10}\cdot85\)
\(=2^{20}\cdot15+2^{10}\cdot10^{10}\)
\(=2^{10}\cdot15\cdot2^{10}+2^{10}\cdot10^{10}\)
\(=2^{10}\cdot15360+2^{10}\cdot10^{10}\)
\(=2^{10}\cdot\left(15360+10^{10}\right)\)
=(3^3)^16/(3^2)^10=3^48/3^20=3^48-20=3^28
=(5^3)^3/(5^2)^4=5^9/5^8=5^9-8=5
=(24/3)^4-(32/16)^12=(2^3)^4-2^12=2^12-12=1
