KQ là \(-\frac{61}{16}\)

mk ko bít bạn có cần lời giải ko mk chỉ vít kq hoi 

có j nếu cần lời giải ns mk ha  

\(4\frac{25}{16_{ }}+25.\left(\frac{9}{16}-\frac{117}{64}\right):\frac{27}{8}\)

=\(\frac{25}{4}+25.\left(\frac{36}{64}-\frac{117}{64}\right):\frac{27}{8}\)

=\(\frac{25}{4}+25.\left(\frac{-81}{64}\right):\frac{28}{7}\)

=\(\frac{25}{4}+\left(\frac{-2025}{64}\right).\frac{7}{28}\)

=\(\frac{25}{4}+\left(\frac{-2025}{256}\right)\)

=\(\frac{1600}{256}-\frac{2025}{256}\)

=\(\frac{-425}{256}\)

bn xem có đúng k  nhé!

\(=\frac{89}{16}+25.\frac{369}{500}:\left(\frac{-27}{8}\right)\)

\(=\frac{89}{16}+\frac{369}{20}:\left(\frac{-27}{8}\right)\)

\(=\frac{89}{16}+\frac{-82}{15}\)

\(=\frac{23}{240}\)

a)Ta có:

\(A=4\frac{25}{16}+25\left(\frac{9}{16}:\frac{125}{64}\right):\frac{-27}{8}\)

\(\Rightarrow A=\frac{89}{16}+25.\frac{36}{125}:\frac{-27}{8}\)

\(\Rightarrow A=\frac{89}{16}+\frac{36}{5}:\frac{-27}{8}\)

\(\Rightarrow A=\frac{89}{16}+\frac{-32}{15}\)

\(\Rightarrow A=\frac{823}{240}\)

Vậy A=.....

b)Ta có:

\(C=\frac{2^3}{3.5}+\frac{2^3}{5.7}+\frac{2^3}{7.9}+...+\frac{2^3}{101.103}\)

\(\Rightarrow C=\frac{2^2.2}{3.5}+\frac{2^2.2}{5.7}+\frac{2^2.2}{7.9}+...+\frac{2^2.2}{101.103}\)

\(\Rightarrow C=2^2\left(\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+...+\frac{2}{101.103}\right)\)

\(\Rightarrow C=4\left(\frac{1}{3}-\frac{1}{5}+\frac{1}{5}-\frac{1}{7}+\frac{1}{7}-\frac{1}{9}+....+\frac{1}{101}-\frac{1}{103}\right)\)

\(\Rightarrow C=4\left(\frac{1}{3}-\frac{1}{103}\right)\)

\(\Rightarrow C=4.\frac{100}{309}\)

\(\Rightarrow C=\frac{400}{309}\)

Vậy C=.....

B, C=2^3/3.5 + 2^3/5.7+......+2^3/101.103

C= 2^3(1/3-1/5+1/5-1/7+....+1/101-1/103)

C=8(1/3-1/103)

C=8.100/309

C=800/309

VẬY C= 800/309

mik làm được mỗi ý b thui : 

b ) \(\frac{169}{10}=16,9\)

mik nha

phần đầu bằng -6675/128

phần sau bằng 13 

bạn dùng máy tính là được mà

\(4\frac{25}{16}X25\left(\frac{9}{16}-\frac{117}{64}\right):\frac{27}{8}=-\frac{6675}{128}=-52,1484375\)

\(\frac{5}{16}:0,125+1,456:\frac{7}{25}+4\frac{1}{2}+0,8=13\)

a) \(\frac{-61}{16}\)

b) -360

c) 11,3

=\(\frac{89}{15}+25(-\frac{81}{64}):\frac{27}{8}\)

=\(\frac{89}{15}+(-\frac{2025}{64}):\frac{27}{8} \)

=\(\frac{89}{15}+(-\frac{75}{8})\)

=\(-\frac{89}{24}\)

\(\frac{89}{15}\)+  25 \((\) \(\frac{36}{64}\)\(-\)\(\frac{117}{64}\)\()\). \(\frac{8}{27}\)

=  \(\frac{89}{15}\)+ 25 \((\)\(\frac{-81}{64}\)\()\)\(\frac{8}{27}\)

= \(\frac{89}{15}\)+ 25 . \((\)\(\frac{-3}{8}\)\()\)

= \(\frac{89}{15}\)+ \(\frac{-75}{8}\)

= \(\frac{-413}{120}\)

Nếu đúng cho mình xin 1 k nhé 

Đáp án là  :\(\frac{17}{48}\)bạn nhé.

đề bài là gì vậy bạn

\(\frac{1}{5}+\frac{4}{10}+...+\frac{81}{45}=\frac{1}{5}+\frac{2}{5}+\frac{3}{5}+...+\frac{9}{5}=\frac{1+2+3+...+9}{5}=\frac{45}{5}=9\)

1/5 + 4/10 + 9/15 + 16/20 + 25/25 + 36/30 + 49/35 + 64/40 + 81/45

=1/5 + 2/5 + 3/5 + 4/5 + 5/5 + 6/5 + 7/5 + 8/5 + 9/5

=45/5 = 9