Các bạn giải hộ mình bài này với ạaaa

$b) 195+\{[(5^2.3-51:17)+2^3]:4^2\}$

$=195+\{[(25.3-3)+8]:4^2\}$

$=195+\{(72+8):16\}$

$=195+(80:16)$

$=195+5$

$=200$

$c) 100:\{250:[325-(4.5^3-2^2.50)]\}$

$=100:\{250:[325-(4.125-4.50)]\}$

$=100:\{250:[325-300]\}$

$=100:\{250:25\}$

$=100:10$

$=10$

$d)500-\{5.[409-(2^3.3-21)^2]+10^3\}$

$=500-\{5.[409-3^2]+1000\}$

$=500-\{5.400+1000\}$

$=500-(2000+1000)$

$=500-3000$

$=-2500$