第62页

信息发布者:
​$=\frac {5}{8}+(\frac {2}{3}-\frac {1}{6})$​
​$=\frac {5}{8}+\frac {1}{2}$​
​$=\frac {5}{8}+\frac {4}{8}$​
​$= \frac {9}{8}$​
​$=2-(\frac {12}{15}-\frac {10}{15})$​
​$=2-\frac {2}{15}$​
​$= \frac {28}{15}$​
​$=\frac {11}{12}-\frac {7}{24}$​
​$=\frac {22}{24}-\frac {7}{24}$​
​$=\frac {15}{24}$​
​$= \frac {5}{8}$​
​$=\frac {14}{18}+\frac {15}{18}-\frac {6}{18}$​
​$=\frac {29}{18}-\frac {6}{18}$​
​$= \frac {23}{18}$​
$\frac{7}{8}$
4
9
​$ \frac {19}{20}-\frac {1}{8}+\frac {19}{20}=\frac {71}{40}($​吨​$)$​
答:这堆货物原有​$\frac {71}{40}$​吨。
1
3
​$ \frac {4}{7}+\frac {4}{7}+\frac {2}{9}=\frac {86}{63}($​米​$)$​
答:这个等腰三角形的周长是​$\frac {86}{63}$​米。
$\frac{31}{30}$
​$ 1-\frac {3}{8}-\frac {3}{8}=\frac {1}{4}$​
答:运往甲市的货物占这堆货物的​$\frac {1}{4}$​。