d, ( 417 + 64 ) : ( 416 + 16 )
= ( 417 + 43 ) : ( 416 + 42 )
= 420 : 418 = 42 = 16
Chúc bn hc tốt <3
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\(a,248+14.36-3744:18=248+504-208\)
\(=8.31+8.63-8.26\)
\(=8\left(31+63-26\right)\)
\(=8.68=544\)
\(\left[347^0+\left(28-4^2:2^4\right)\right].2^5-9^3:9=\left[1+\left(28-1\right)\right].32-9^2\)
\(=28.32-81\)
\(=896-81=815\)
\(c,196.39+84.98+21.196-392=196.39+84.98+21.196-98.4\)
\(=196\left(39+21\right)+98\left(84-4\right)\)
\(=196.60+98.80\)
\(=20\left(196.3+98.4\right)\)
\(=20.980=19600\)
\(d,\left(4^{17}+64\right):\left(4^{16}+16\right)=\left(4^{17}+4^3\right):\left(4^{16}+4^2\right)\)
\(=\frac{4^3\left(4^{14}+1\right)}{4^2\left(4^{14}+1\right)}=4\)
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