Bài 5 : Thực hiện phép tính:
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b)1024(5)-132(5)=892(5)
c)214(5).32(5)=6848(5)
d)211(5):13(5)=17(5)
2,1001(2):11(2)=91(2)
hehe làm bừa sai xin lỗi
vì tui ko hiểu
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\(=\dfrac{3}{5}+\dfrac{2}{5}\cdot\dfrac{5}{6}=\dfrac{3}{5}+\dfrac{1}{3}=\dfrac{9}{15}+\dfrac{5}{15}=\dfrac{14}{15}\)
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3/4-5/6=18/24+20/24=38/24
tớ nhanh nhất mà
Đúng 100%
Đúng 100%
Đúng 100%
Đúng 100%
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sẵn tiện giúp em luôn nha :
( -17)+ 14+ (-12)
5 mũ 10 : 5 mũ 8 +60 : 12+(-10)
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Bài 1:
b: \(=\dfrac{x+3-4-x}{x-2}=\dfrac{-1}{x-2}\)
Bài 2:
a: \(=\dfrac{x+1}{2\left(x+3\right)}+\dfrac{2x+3}{x\left(x+3\right)}\)
\(=\dfrac{x^2+x+4x+6}{2x\left(x+3\right)}=\dfrac{x^2+5x+6}{2x\left(x+3\right)}=\dfrac{x+2}{2x}\)
d: \(=\dfrac{3}{2x^2y}+\dfrac{5}{xy^2}+\dfrac{x}{y^3}\)
\(=\dfrac{3y^2+10xy+2x^3}{2x^2y^3}\)
e: \(=\dfrac{x^2+2xy+x^2-2xy-4xy}{\left(x+2y\right)\left(x-2y\right)}=\dfrac{2x^2-4xy}{\left(x+2y\right)\cdot\left(x-2y\right)}=\dfrac{2x}{x+2y}\)
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\(4^3:2^5+3^5:9^2=64:32+243:81=2+3=5\\ \left(\dfrac{1}{2}\right)^5-1,5^2+\dfrac{31}{32}+102,25=\dfrac{1}{32}-\dfrac{9}{4}+\dfrac{31}{32}+\dfrac{409}{4}\\ =\left(\dfrac{1}{32}+\dfrac{31}{32}\right)+\left(\dfrac{409}{4}-\dfrac{9}{4}\right)=1+100=101\\ \left(-1\right)^{2023}+\left(-\dfrac{1}{2}\right)^2:2=\left(-1\right)+\dfrac{1}{4}:2=-1+\dfrac{1}{8}=-\dfrac{7}{8}\)