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\(\dfrac{8}{3}-\dfrac{5}{7}=\dfrac{8\times7}{3\times7}-\dfrac{5\times3}{7\times3}=\dfrac{56}{21}-\dfrac{15}{21}=\dfrac{56-15}{21}=\dfrac{41}{21}\)
\(\dfrac{8}{3}-\dfrac{5}{7}=\dfrac{56}{21}-\dfrac{15}{21}=\dfrac{56-15}{21}=\dfrac{41}{21}\)
\(x\times\dfrac{11}{8}=\dfrac{33}{20}\)
\(x=\dfrac{33}{20}:\dfrac{11}{8}\)
\(x=\dfrac{33}{20}\times\dfrac{8}{11}\)
\(x=\dfrac{6}{5}\)
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\(5:x=\dfrac{4}{7}\)
\(x=5:\dfrac{4}{7}\)
\(x=5\times\dfrac{7}{4}\)
\(x=\dfrac{35}{4}\)
Chúc bạn học tốt
\(x\times11=\dfrac{33}{20}\)
\(x=\dfrac{33}{20}:11\)
\(x=\dfrac{3}{20}\)
\(5:x=\dfrac{4}{7}\)
\(x=5:\dfrac{4}{7}\)
\(x=\dfrac{35}{4}\)
a } 4 / 5 x 3 /y x 2 / 11 = 24 / 165
= 4/5 x 2/11 x 3/y =24/125
=8/55 x 3/y=24/125
= 24/125:8/55
=33/25
a) X x 5/8 = 1/3
X = 1/3 : 5/8
X = 1/3 x 8/5
X = 8/15
b) 12/11 x X = 4
X = 4 : 12/11
X = 4 x 11/12
X = 33
c) 5 x X = 7/9
X = 7/9 : 5
X = 7/9 x 5
X = 35/45
X = 7/9
Nếu mình có trả lời sai thì thông cảm cho mình vì mình cũng lớp 4 :)
a: x=9/2-3/7=57/14
b: =>x=7/5x5/7=1
c: =>x=11/3:3/8=11/3x8/3=88/9
a : x = \(\dfrac{9}{2}\) - \(\dfrac{3}{7}\) = \(\dfrac{57}{14}\)
b : = > x = \(\dfrac{7}{5}\) x\(\dfrac{5}{7}\) = 1
c : = > \(\dfrac{11}{3}\) : \(\dfrac{3}{8}\) = \(\dfrac{11}{3}\) x \(\dfrac{8}{3}\) = \(\dfrac{88}{9}\)
a: \(\Leftrightarrow x=\dfrac{33}{20}:\dfrac{11}{8}=\dfrac{33}{20}\cdot\dfrac{8}{11}=3\cdot\dfrac{2}{5}=\dfrac{6}{5}\)
b: \(\Leftrightarrow x=5:\dfrac{4}{7}=\dfrac{35}{4}\)
Thanks bn nha