\(\frac{9}{22}\)+\(\frac{3}{11}\)
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\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)
\(=\frac{5}{9}:\frac{-3}{22}+\frac{5}{9}:\frac{-3}{5}\)
\(=\frac{5}{9}\cdot\frac{-22}{3}+\frac{5}{9}\cdot\frac{-5}{3}\)
\(=\frac{5}{9}\cdot\left(\frac{-22}{3}+\frac{-5}{3}\right)\)
\(=\frac{5}{9}\cdot\left(-9\right)\)
\(=-5\)
đúng đó nhưng bạn nên nhóm \(\frac{-22}{3}\)và \(\frac{-5}{3}\)vào với nhau và đặt \(\frac{5}{9}\)ra ngoài sẽ tính nhanh hơn
\(\frac{9}{22}+\frac{3}{11}\)
\(=\frac{9}{22}+\frac{6}{22}\)
\(=\frac{15}{22}\)
Đáp số : \(\frac{15}{22}\)
\(\frac{-5}{12}:\left(\frac{11}{4}x-\frac{3}{4}\right)=\frac{22}{9}\)
\(\Rightarrow\frac{11}{4}x-\frac{3}{4}=\frac{-5}{12}:\frac{22}{9}\)
\(\Rightarrow\frac{11}{4}x=\frac{-15}{88}+\frac{3}{4}\)
\(\Rightarrow x=\frac{51}{88}:\frac{11}{4}=\frac{51}{242}\)
Vậy \(x=\frac{51}{242}\)
\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)
\(=\frac{5}{9}:\left(\frac{2}{22}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{10}{15}\right)\)
\(=\frac{5}{9}:\frac{\left(-3\right)}{22}+\frac{5}{9}:\frac{\left(-9\right)}{15}\)
\(=\frac{5}{9}.\frac{22}{\left(-3\right)}+\frac{5}{9}.\frac{15}{\left(-9\right)}\)
\(=\frac{5}{9}.\left(\frac{-22}{3}+\frac{-15}{9}\right)\)
\(=\frac{5}{9}.\left(\frac{-66}{9}+\frac{-15}{9}\right)\)
\(=\frac{5}{9}.\frac{\left(-81\right)}{9}=-5\)
\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)
\(=\frac{5}{9}:\left(\frac{-3}{22}\right)+\frac{5}{9}:\left(\frac{-3}{5}\right)\)
\(=\frac{5}{9}.\left(-\frac{22}{3}\right)+\frac{5}{9}.\left(-\frac{5}{3}\right)\)
\(=\frac{5}{9}.\left[-\frac{22}{3}+\left(-\frac{5}{3}\right)\right]\)
\(=\frac{5}{9}.\left(-9\right)\)
\(=-5\)
\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)
\(=\frac{5}{9}:\left[\left(\frac{1}{11}-\frac{5}{22}\right)+\left(\frac{1}{15}-\frac{2}{3}\right)\right]\)
\(=\frac{5}{9}:\left[-\frac{3}{22}-\frac{3}{5}\right]\)
\(=\frac{5}{9}:\frac{-81}{110}=\frac{5}{9}.\frac{-110}{81}\)
\(=-\frac{550}{729}\)
\(\frac{5}{9}:\frac{-3}{22}+\frac{5}{9}:\frac{-3}{5}\)
=\(\frac{5}{9}.\frac{-22}{3}+\frac{5}{9}.\frac{-5}{3}\)
=\(\frac{5}{9}.\left(\frac{-22}{3}-\frac{5}{3}\right)\)
=\(\frac{5}{9}.\left(-9\right)\)
=-5
\(\frac{9}{22}\)và \(\frac{3}{11}\)
Ta có : \(\frac{3}{11}=\frac{6}{22}\)
\(\frac{9}{22}+\frac{6}{22}=\frac{15}{22}\)
Ủng hộ nhé !
quy đồng 3/11=6/22
6/22+9/22=15/22
đ/s:15/22