Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
A. \(\frac{2}{5}\div\frac{2}{3}=\frac{2}{5}\times\frac{3}{2}=\frac{2\times3}{5\times2}=\frac{3}{5}\text{ }\)
B. \(\frac{4}{7}\div\frac{4}{5}=\frac{4}{7}\times\frac{5}{4}=\frac{4\times5}{7\times4}=\frac{5}{7}\)
C. \(\frac{1}{6}\div\frac{1}{3}=\frac{1}{6}\times\frac{3}{1}=\frac{3}{6}=\frac{1}{2}\)
D. \(\frac{1}{4}\div\frac{1}{8}=\frac{1}{4}\times\frac{8}{1}=\frac{8}{4}=2\)
a) \(\left(\frac{1}{3}+\frac{1}{5}\right)\times x=\frac{8}{25}\)
\(\frac{8}{15}\times x=\frac{8}{25}\)
\(x=\frac{8}{25}:\frac{8}{15}\)
\(x=\frac{3}{5}\)
Vậy x = 3/5
b) \(\frac{1}{2}:\frac{4}{5}:x=\frac{7}{3}\)
\(\frac{5}{8}:x=\frac{7}{3}\)
\(x=\frac{5}{8}:\frac{7}{3}\)
\(x=\frac{15}{56}\)
Vậy x = 15/36
ủng hộ tớ nha. thank you nhìu
a) (1/3 + 1/5) . x = 8/25
(5/15 + 3/15) . x = 8/25
=> 8/15 . x = 8/25
x = 8/25 : 8/15
x = 3/5
Vậy x = 3/5
a) \(\dfrac{3}{7}\)
b)\(\dfrac{9}{4}\)
c)\(\dfrac{1}{3}\)
d)\(\dfrac{41}{32}\)
e)\(\dfrac{73}{60}\)
\(\dfrac{4}{3}:\dfrac{2}{5}=\dfrac{4}{3}\cdot\dfrac{5}{2}=\dfrac{20}{6}=\dfrac{10}{3}\)
\(\dfrac{1}{8}:7=\dfrac{1}{8\cdot7}=\dfrac{1}{56}\)
\(3:\dfrac{4}{5}=3\cdot\dfrac{5}{4}=\dfrac{15}{4}\)
\(\dfrac{4}{5}:3=\dfrac{4}{5\cdot3}=\dfrac{4}{15}\)
a) \(\frac{3}{5}\times x=\frac{4}{7}\)
\(x=\frac{4}{7}:\frac{3}{5}\)
\(x=\frac{20}{21}\)
b) \(\frac{1}{8}:x=\frac{1}{5}\)
\(x=\frac{1}{8}:\frac{1}{5}\)
\(x=\frac{5}{8}\)
k nha
a)x=\(\frac{4}{7}:\frac{3}{5}\)
x=20/21
b) x=\(\frac{1}{8}:\frac{1}{5}\)
=>x=5/8
k to di mà
8/12 + 9/12 = 17/12
12/15 - 5/15 = 7/15
4 x 8/3 = 32/3
1/8 x 3 = 3/8
5 x 2 = 10
2/5 x 1/4 = 2/20 = 1/10
\(\dfrac{2}{3}+\dfrac{3}{4}=\dfrac{8}{12}+\dfrac{9}{12}=\dfrac{17}{12};\dfrac{4}{5}-\dfrac{1}{3}=\dfrac{12}{15}-\dfrac{5}{15}=\dfrac{7}{15}\\ 4\times\dfrac{8}{3}=\dfrac{32}{3};\dfrac{1}{8}\times3=\dfrac{3}{8}\\ 5:\dfrac{1}{2}=5\times\dfrac{2}{1}=10;\dfrac{2}{5}:4=\dfrac{2}{5}\times\dfrac{1}{4}=\dfrac{2}{20}=\dfrac{1}{10}\)