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nguyenhongbang1981
2 năm trước
a)345.(191-79)-191.(345+79)+79.139 b)3. $\frac{1}{3}$-2 $\frac{1}{2}$+3$\frac{1}{3}:$\frac{1}{3} c)5 $\frac{1}{10}$-(1 $\frac{2}{7}$+3 $\frac{3}{10}$) d)2- $\frac{13}{9}$: $\frac{5}{14}$. $\frac{5}{9}$.$\frac{14}{5}$ giúp mik vs các bn làm câu nào cũng đc mik đag cần gấp mik hứa sẽ vote 5 sao
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