A. 1/5 : x = 2/3
x = 1/5 : 2/3
x = 1/5 * 3/2
x = 3/10
B. 3/8 * x = 5/7
x = 5/7 : 3/8
x = 5/7 * 8/3
x = 40/21
a)\(\frac{1}{5}:x=\frac{2}{3}\)
\(x=\frac{2}{3}\times\frac{1}{5}\)
\(x=\frac{2}{15}\)
b)\(\frac{3}{8}\times x=\frac{5}{7}\)
\(x=\frac{5}{7}\times\frac{8}{3}\)
\(x=\frac{40}{21}\)
Bài làm
a) \(\frac{1}{5}:X=\frac{2}{3}\) b) \(\frac{3}{8}xX=\frac{5}{7}\)
\(X=\frac{1}{5}:\frac{2}{3}\) \(X=\frac{5}{7}:\frac{3}{8}\)
\(X=\frac{1}{5}x\frac{3}{2}\) \(X=\frac{5}{7}x\frac{8}{3}\)
\(X=\frac{3}{10}\) \(X=\frac{40}{21}\)
Vậy \(X=\frac{3}{10}\) Vậy \(X=\frac{40}{21}\)
# Chúc bạn học tốt #
A) \(\frac{1}{5}:x=\frac{2}{3}\)
\(x=\frac{1}{5}:\frac{2}{3}\)
\(x=\frac{1}{5}\cdot\frac{3}{2}\)
\(x=\frac{3}{10}\)
B) \(\frac{3}{8}\cdot x=\frac{5}{7}\)
\(x=\frac{5}{7}:\frac{3}{8}\)
\(x=\frac{5}{7}\cdot\frac{8}{3}\)
\(x=\frac{40}{21}\)
A.1/5:x=2/3
x=1/5:2/3
x=1/5*3/2
x=3/10
B.3/8*x=5/7
x=5/7:3/8
x=5/7*8/3
x=40/21
k cho minh nha
a)\(\frac{1}{5}:x=\frac{2}{3}\)
\(x=\frac{1}{5}:\frac{2}{3}=\frac{3}{10}\)
b)\(\frac{3}{8}\cdot x=\frac{5}{7}\)
\(x=\frac{5}{7}:\frac{3}{8}=\frac{40}{21}\)
\(\frac{1}{5}:x=\frac{2}{3}\)
\(=\frac{1}{5}\times\frac{2}{3}\)
\(=\frac{2}{15}\)
\(\frac{3}{8}\times x=\frac{5}{7}\)
\(x=\frac{5}{7}:\frac{3}{8}\)
\(x=\frac{5}{7}\times\frac{8}{3}\)
\(x=\frac{40}{21}\)