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A
\(\frac{3}{5}\div\frac{4}{5}+\frac{1}{2}\times\frac{2}{3}\)
\(=\frac{3}{4}+\frac{1}{3}\)
\(=\frac{13}{12}\)
B
\(\frac{5}{4}\times x=\frac{3}{8}+\frac{1}{4}\)
\(\frac{5}{4}\times x =\frac{5}{8}\)
\(x=\frac{5}{8}\div\frac{5}{4}\)
\(x=\frac{4}{8}=\frac{1}{2}\)
\(4+\frac{11}{8}-\frac{5}{6}=\frac{96+33-20}{24}=\frac{109}{24}\)
\(\left(\frac{1}{2}+\frac{4}{7}\right)-\left(\frac{3}{7}-\frac{3}{10}\right)=\frac{1}{2}+\frac{4}{7}-\frac{3}{7}+\frac{3}{10}\)
\(\left(\frac{1}{2}+\frac{3}{10}\right)+\left(\frac{4}{7}-\frac{3}{7}\right)=\frac{4}{5}+\frac{1}{7}=\frac{28+5}{35}=\frac{33}{35}\)
ban Chitanda Eru oi to bao nhung ma nhan voi bao nhieu ma ra duoc 96
\(\frac{1\times2\times3\times4}{5\times6\times7\times8}\)
\(=\frac{1\times2\times3\times4}{5\times2\times3\times7\times4\times2}\)
\(=\frac{1}{5\times7\times2}\)
\(=\frac{1}{70}\)
a) 495:(17+28)*18
= 495:45*18
=11*18
=198
b) 238:(32-15)*15
=238:17*15
=14*15
=210
c) 1431:(27-24)*4
=1431:3*4
=477*4
=1908
d) 5000:(18-8)* 17
=5000:10*17
=500*17
=8500
7/5 -6/5:3=7/5-2/5=1
yx6/7 = 3/4+2
y x 6/7 =11/4
y = 11/4:6/7
y =77/24
Bài 1:
7/5 - 6/5 : 3
= 7/5 - 2/5
= 5/5 = 1.
Bài 2:
y x 6/7 = 3/4 + 2
y x 6/7 = 15/4
y = 15/4 : 6/7
y = 35/8.
K mình nha!
\(\frac{4}{5}+\frac{3}{4}:\frac{2}{3}=\frac{4}{5}+\frac{9}{8}=\frac{77}{40}\)
\(\frac{7}{2}-\frac{4}{3}.\frac{1}{6}=\frac{7}{2}-\frac{2}{9}=\frac{59}{18}\)
4/5+3/4×3/2
4/5+9/8
77/40
7/2-2/9
59/18