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\(6.x=\frac{1}{2}\)
\(x=\frac{1}{2}:6\)
\(x=\frac{1}{12}\)
\(x:\frac{3}{7}=\frac{7}{11}\)
\(x=\frac{7}{11}.\frac{3}{7}\)
\(x=\frac{3}{11}\)
Dấu chấm là dấu nhân nha
a, 6/9+5/7+1/3=2/3+5/7+1/3=5/7+1=12/7
b, 17/7+6/5-20/14=17/7+6/5-10/7=6/5+1=11/5
c,2/5x1/4+3/4x2/5=2/5x(1/4+3/4)=2/5x1=2/5
d, 6/11:4/6+5/11:2/3=6/11:2/3+5/11:2/3=(6/11+5/11):2/3=3/2
nha
Ta có ; \(\frac{3}{7}\times\frac{4}{11}+\frac{3}{7}\times\frac{5}{11}+\frac{1}{2}\)
\(=\frac{3}{7}\times\left(\frac{4}{11}+\frac{5}{11}\right)+\frac{1}{2}\)
\(=\frac{3}{7}\times\frac{9}{11}+\frac{1}{2}\)
\(=\frac{27}{77}+\frac{1}{2}\)
\(=\frac{131}{154}\)
bai nay de thui
nhung bay gio mk ban
luc nao ranh mk lam
cho nha
minhpham@gmail.com
a) \(1284-16401:231+58\) x\(11=1284-71+638\)
\(=1851\)
b)\(\frac{7}{4}+1\frac{1}{2}\)x \(1\frac{3}{2}:\frac{1}{4}=\frac{7}{4}+15\)
\(=\frac{67}{4}\)
c)\(2\frac{1}{4}+1\frac{2}{5}+\frac{4}{20}\)\(=\frac{9}{4}+\frac{7}{5}+\frac{1}{5}\)
\(=\frac{77}{20}\)
d)\(\left(\frac{12}{5}+\frac{2}{3}-\frac{11}{4}\right):\frac{3}{4}=\frac{19}{60}:\frac{3}{4}\)
\(=\frac{19}{60}\)x \(\frac{4}{3}\)
\(=\frac{19}{45}\)
7/18 + 5/3 . 12/9 : 55/4
= 7/18 + 20/9 . 4/55
= 7/18 + 16/99
= 693/1782 + 288/1782
= 981/1782
\(\frac{1}{7}\times3\frac{1}{11}-\frac{1}{7}\times\frac{9}{11}-\frac{1}{7}\)
\(=\frac{1}{7}\times\frac{34}{11}-\frac{1}{7}\times\frac{9}{11}-\frac{1}{7}\)
\(=\frac{1}{7}\left(\frac{34}{11}-\frac{9}{11}-\frac{11}{11}\right)\)
\(=\frac{1}{7}\times\frac{14}{11}\)
\(=\frac{2}{11}\)
\(\frac{1}{7}\)\(\times3\frac{1}{11}\)\(-\frac{1}{7}\)\(\times\frac{9}{11}\)\(-\frac{1}{7}\)
Đề bài thế này hả bạn?