24.5-[131-(13-4)2]
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\(2^4.5-\left[131-\left(13-4\right)^2\right]=16.5-\left[131-81\right]=80-50=30\)
\(2^4.5-\left[131-\left(13-4\right)^2\right]\)
\(=2^4.5-\left(131-9^2\right)\)
\(=2^4.5-\left(131-81\right)\)
\(=2^4.5-50\)
\(=16.5-50\)
\(=80-50\)
\(=30\)
\(2^4.5-\left[131-\left(31-4\right)^2\right]\)
<=>\(80-\left[131-729\right]\)
<=>\(80-\left(-598\right)\)
<=>\(678\)
=))))))))))))))))))))))))))))))
a) \(4.5^2-81:3^2=4.25-81:9=100-9=91\)
b) \(3^3.23-3^3.19=3^3.\left(23-19\right)=27.4=108\)
c) \(2^4.5-[131-\left(13-4\right)^2]=16.5-\left(131-9^2\right)=80-\left(131-81\right)=80-50=30\)
d) \(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)
\(=100:\left\{250:\left[450-4.\left(125-25\right)\right]\right\}\)
\(=100:\left[250:\left(450-4.100\right)\right]\)
\(=100:\left[250:\left(450-400\right)\right]=100:\left(250:50\right)=100:5=20\)
2^4.5-[131-(130-4)^2]
=16.5-[131-126^2]
=80-[131-15876]
=80--15745
=80+15745
=15825
\(2^4.5-\left[131-\left(130-4\right)^2\right]=1280-\left[131-15876\right]=1280-\left(-15745\right)=17025\)
b
.ta có
=-3/5+28/5.43/56+28/5.5/24-28/5.21/63
=-3/5+28/5.(43/56+5/24-21/63)
=5.9/14=45/14
suy ra
biểu thức b có giá trị là 45/14
24.5-[131-(13-4)2]
=16.5-[131-92]
=80-(131-81)
=80-50=30
24 . 5 - [131 - (13-4)2 ]
= 24 . 5 - [131 - 92 ]
= 24 . 5 - 50
=80 - 50
= 30