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at.it.k10
2 năm trước
bài 1 a, $\frac{4}{5}$+ $\frac{8}{15}$- $\frac{3}{7}$ b,12$\frac{3}{7}$-(5$\frac{3}{4}$+4$\frac{3}{7}$ c,$\frac{-5}{7}$.$\frac{13}{15}$+$\frac{-4}{9}$+$\frac{-5}{7}$.$\frac{2}{15}$ d,(1-$\frac{1}{2}$)(1-$\frac{1}{3}$).....(1-$\frac{1}{20}$) cố giúp mik nha hứa cho hay nhất
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