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![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{9}{22}x55=\frac{9x55}{22}=\frac{495}{22}\frac{45}{2}\)
k mình nhé các bạn
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{7}{9}\cdot\dfrac{3}{35}=\dfrac{7}{3\cdot3}\cdot\dfrac{3}{7\cdot5}=\dfrac{1}{15}\)
\(\dfrac{9}{22}\cdot55=\dfrac{9}{11\cdot2}\cdot11\cdot5=\dfrac{45}{2}\)
\(\dfrac{11}{17}:\dfrac{33}{34}=\dfrac{11}{17}\cdot\dfrac{34}{33}=\dfrac{11\cdot17\cdot2}{17\cdot11\cdot3}=\dfrac{2}{3}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
5/9 x 12/25 = 4/15
12/11 : 36/ 55 = 5/3
9/55 x 22 = 18/5
144/7 : 36 = 4/7
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{7}{9}\cdot\frac{3}{5}=\frac{7\cdot3}{9\cdot5}=\frac{7\cdot1}{3\cdot5}=\frac{7}{15}\)
\(\frac{9}{22}\cdot55=\frac{9}{22}\cdot\frac{55}{1}=\frac{9\cdot55}{22\cdot1}=\frac{9\cdot5}{2\cdot1}=\frac{45}{2}\)
\(\frac{11}{17}:\frac{33}{34}=\frac{11}{17}\cdot\frac{34}{33}=\frac{11\cdot34}{17\cdot33}=\frac{1\cdot2}{1\cdot3}=\frac{2}{3}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài làm
\(\frac{45}{27}-\frac{9}{12}-\frac{22}{55}\)
\(=\frac{5}{3}-\frac{3}{4}-\frac{2}{5}\)
\(=\frac{100}{60}-\frac{45}{60}-\frac{24}{60}\)
\(=\frac{31}{60}\)
# Chúc bạn học tốt #
9/22 x 55 = 9/22 x 55/1 = 45/2
tớ chắc chắn đúng 100%
45/2 hoặc 22.5