Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{x}{12}+\frac{5}{24}=\frac{5}{6}\)
\(\frac{x}{12}=\frac{5}{6}-\frac{5}{24}\)
\(\frac{x}{12}=\frac{20}{24}-\frac{5}{24}\)
\(\frac{x}{12}=\frac{15}{24}\)
\(\frac{2x}{24}=\frac{15}{24}\)
=> 2x = 15
=> \(x=\frac{15}{2}\)
\(=87+\frac{23}{59}+74+\frac{17}{71}+12+\frac{36}{59}+25+\frac{54}{71}\)
=\(\left(87+74+12+25\right)+\left(\frac{23}{59}+\frac{36}{59}\right)+\left(\frac{17}{71}+\frac{54}{71}\right)\)
=\(198+1+1=200\)
\(\frac{9}{15}< \frac{9}{17}\)
\(\frac{12}{25}=\frac{36}{75}\)
\(\frac{17}{15}< \frac{5}{4}\)
\(\frac{5}{12}:\frac{7}{4}-\frac{25}{8}:\frac{35}{6}\)
\(=\frac{5}{12}X\frac{4}{7}-\frac{25}{8}X\frac{6}{35}\)
\(=\frac{5}{21}-\frac{15}{28}\)
\(=-\frac{25}{84}\)
a) \(\frac{5}{1.4}+\frac{5}{4.7}+\frac{5}{7.10}+.....+\frac{5}{27.30}\)
\(=\frac{5}{3}\left(\frac{1}{1.4}+\frac{1}{4.7}+........+\frac{1}{27.30}\right)\)
\(=\frac{5}{3}\left(1-\frac{1}{4}+\frac{1}{4}-\frac{1}{7}+.....+\frac{1}{27}-\frac{1}{30}\right)\)
\(=\frac{5}{3}\left(1-\frac{1}{30}\right)\)
\(=\frac{5}{3}.\frac{29}{30}=\frac{29}{36}\)
Đặt \(A=\frac{12}{3\cdot5}+\frac{12}{5\cdot7}+\frac{12}{7\cdot9}+....+\frac{12}{97\cdot99}\)
\(2A=\frac{12}{3}-\frac{12}{5}+\frac{12}{5}-\frac{12}{7}+...+\frac{12}{97}-\frac{12}{99}\)
\(2A=\frac{12}{3}-\frac{12}{99}\)
\(A=\frac{128}{33}\cdot\frac{1}{2}=\frac{64}{33}\)
Bài 1 :
a) \(\frac{6}{10}\)
Bài 2 :
c) \(\frac{8}{18}\)
Bài 1:
Kết quả:\(\frac{6}{10}\)
Bài 2:
Kết quả:\(\frac{8}{18}\)
K CHO MK NHA:
KÍ TÊN
\(!@#HUYDEPZAI\%\&\)
\(=66\frac{5}{12}+37+25\frac{1}{2}\)
\(\frac{797}{12}+\frac{444}{12}+\frac{51}{2}=\frac{1241}{12}+\frac{306}{12}=\frac{1547}{12}=128\frac{11}{12}\)
**** **** ****
\(66\frac{5}{12}+36\frac{12}{12}+25\frac{12}{24}=66\frac{5}{12}+36+1+25\frac{6}{12}=\left(66+37+25\right)+\left(\frac{5}{12}+\frac{6}{12}\right)=128+\frac{11}{12}=128\frac{11}{12}\)