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\(A=\dfrac{2^{10}\cdot13+2^{10}\cdot65}{2^8\cdot2^3\cdot13}=\dfrac{2^{11}\cdot3\cdot13}{2^{11}\cdot13}=3\)

23 tháng 8 2016

\(A=\frac{4^5.13+32^2.65}{4^4.104}=\frac{2^{10}.13+2^{10}.13.5}{2^8.2^3.13}=\frac{2^{10}.13.\left(1+5\right)}{2^{11}.13}=\frac{6}{2}=3\)

Vậy A = 3

23 tháng 8 2016
                              

A+B

 

                                                                                                                       
                                                                                                                                                      
                                                                                                                                                      
                                                                                                                                                      
18 tháng 7 2019

`1, (10-4-6)+(5/4-9/14-5/7+7/3)

=0+187/84

=187/ 84

18 tháng 7 2019

29/32.41/36-29/32.32/58-41/36.29/32-41/36.18/41

=-29/32.32/58-41/36.18/41

=-1/2-1/2=-1

12 tháng 4 2017

\(A=\frac{4}{23.27}+\frac{5}{27.32}+\frac{6}{32.38}+\frac{8}{38.46}\)

\(A=\frac{1}{23}-\frac{1}{27}+\frac{1}{27}-\frac{1}{32}+\frac{1}{32}-\frac{1}{38}+\frac{1}{38}-\frac{1}{46}\)

\(A=\frac{1}{23}-\frac{1}{46}\)

\(A=\frac{1}{46}\)

12 tháng 4 2017

=1/23-1/27+1/27-1/32+1/32-1/38+1/38-1/46

=1/32-1/46

xiin lỗi mk ko tính ra kết quả được,mk có chút việc bận

tk mk nha ,thanks nha

a: \(=\left(\dfrac{2}{18}-\dfrac{15}{18}-\dfrac{72}{18}\right):\left(\dfrac{21}{36}-\dfrac{1}{36}-\dfrac{360}{36}\right)\)

\(=\dfrac{-85}{18}:\dfrac{-170}{18}\)

\(=\dfrac{85}{170}=\dfrac{1}{2}\)

b: \(=\left(\dfrac{5}{8}-\dfrac{5}{6}-\dfrac{5}{32}+\dfrac{5}{64}\right):\left(1-\dfrac{1}{2}-\dfrac{1}{4}+\dfrac{1}{8}\right)\)

\(=\dfrac{-55}{192}:\dfrac{3}{8}=\dfrac{-55}{192}\cdot\dfrac{8}{3}=-\dfrac{55}{72}\)