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a, 32 x 35 + 32 x 65 b, 150 : [ 25 x ( 18- 42)]
= 32 x ( 35 +65) = 150 : [ 25 x ( 18-16)]
= 9 x 100 = 150 : ( 25 x 2)
= 900 = 150 : 50 = 3
c, 57 : 54 - 21 x 22
= 53- 2 x 4
= 125-8
=117
a) 3 ^ 2 x 35 + 3 ^ 2 x 65 = 9 x 35 + 9 x 65 = 9 x ( 65 + 35 ) = 9 x 100 = 900
=190:{ [ 950:[225-( 165-130)]}-20170+23.23
=190:{ [ 950:[225-35]}-20170+23.23
=190:{ 950:190}-20170+23.23
=190:5-20170+23.23
=190:5-1+23+3
=190:5-1+26
=190:5-1+64
=38-1+64
=39+64
=103
303 - 3 . {[655 - (18:2+1).43 + 5]} : 100
= 303 - 3 . {[655 - (9+1).64 + 5]} : 1
= 303 - 3 . {[655 - 10.64 + 5]} : 1
= 303 - 3 . {[655 - 640 + 5]} : 1
= 303 - 3 . {15 + 5} : 1
= 303 - 3 . 20 : 1
= 303 - 60 : 1
= 303 - 60
= 243
câu a sai đề hay sao rồi bn ơi
303-3{[655-(18:2+1).4^3+5]}:10^0
=303-3{[655-(9+1).64+5]}:1
=303-3(655-10.64+5):1
=303-3(655-640+5):1
=303-3.20:1
=303-60
=243
303-3. {[655-(18:2+1).43+5]}:100
=303-3.{[655-(18:2+1).64+5]}:1
=303.3{[655-(9+1).64+5]}:1
=303.3{[655-10.64+5]}:1
=303.3{[655-640+5]}:1
=303.3{[15+5]}:1
=303.3.20:1
=909.20:1
=18180:1
=18180
a) 65:[45^2-(2013-2012^0.1^2011)}
= 65:[45^2-(2013-1.1)]
= 65:[45^2-(2013-1)]
= 65:[2025-2012]
= 65:13)
=5
b)|-6|+(-7)+|-4|+(-3)
=6+(-7)+4+(-3)
=(6+4)+[(-7)+(-3)]
=10+(-10)
=0
nhớ đúng cho mình nha
a) \(\left(17x-25\right):8+65=9^2\)
\(\left(17x-25\right).\frac{1}{8}+65=81\)
\(\frac{17}{8}x-\frac{25}{8}=81-65\)
\(\frac{17}{8}x-\frac{25}{8}=16\)
\(\frac{17}{8}x=16+\frac{25}{8}\)
\(\frac{17}{8}x=\frac{128}{8}+\frac{25}{8}\)
\(\frac{17}{8}x=\frac{153}{8}\)
\(x=\frac{153}{8}:\frac{17}{8}\)
\(x=\frac{153}{8}.\frac{8}{17}\)
\(x=\frac{153}{17}\)
\(x=9\)
vay \(x=9\)
b) \(80-\left(4.5^2-3.2^3\right)=2^{10}-\left(x-4\right)\)
\(80-\left(100-24\right)=1024-x+4\)
\(80-76=1028-x\)
\(x=1028-80+76\)
\(x=1024\)
vay \(x=1024\)
4x + 1 + 40 = 65
4x + 1 + 1 = 65
4x + 1 = 64 = 44
=> x + 1 = 4
=> x = 3
Ta có: \(4^{x+1}+1=65\)
\(\Rightarrow4^{x+1}=64\)
\(\Rightarrow4^{x+1}=4^3\)
\(\Rightarrow x+1=3\)
\(\Rightarrow x=3-1=2\)
k cho mình nha cảm ơn nhìu