a: \(7^{18}:7^{16}+2^2:3^3\)
\(=7^2+4:27=49+\dfrac{4}{27}\)
\(=\dfrac{49\cdot27+4}{27}=\dfrac{1327}{27}\)
b: \(1200:2+6^2\cdot2^1+18\)
\(=600+36\cdot2+18\)
=600+90=690
c: \(5^9:5^7+70:14-20\)
\(=5^2+5-20\)
=25+5-20=30-20=10
d: \(3^2:5-2^2\cdot7+83\)
\(=\dfrac{9}{5}-4\cdot7+83=1,8+83-28=56,8\)
e: \(5^9:5^7+12\cdot3+7^0\)
\(=5^2+36+1\)
=25+37=62
f: Sửa đề: \(151-2^{91}:2^{88}+1^2\cdot3\)
\(=151-2^3+1\cdot3\)
\(=151-8+3\)
=154-8=146
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