第49页

信息发布者:
$\frac{6}{7}$
​$ 1\frac {3}{10}($​或​$\frac {13}{10})$​
$\frac{3}{2}$
​$ 6\frac {1}{3}($​或​$\frac {19}{3})$​
6
$\frac{31}{20}$
$\frac{1}{3}$
4
​$=\frac {20}{30}+\frac {24}{30}-\frac {9}{30}$​
​$=\frac {44}{30}-\frac {9}{30}$​
​$=\frac {35}{30}$​
​$= \frac {7}{6}$​
​$=16×\frac {3}{2}$​
​$= 24$​
​$=(\frac {7}{8}+\frac {1}{8})+(\frac {2}{5}+\frac {3}{5})$​
​$=1+1$​
​$= 2$​
​$=\frac {14}{15}×\frac {5}{7}×25$​
​$=\frac {2}{3}×25$​
= $\frac{50}{3}$
​$=\frac {11}{8}-\frac {5}{6}-\frac {3}{8}-\frac {1}{6}$​
​$=(\frac {11}{8}-\frac {3}{8})-(\frac {5}{6}+\frac {1}{6})$​
​$=1-1$​
​$= 0$​
​$=\frac {2}{3}×\frac {3}{5}$​
​$= \frac {2}{5}$​
解​$:4.7x=23.5$​
​$x=23.5÷4.7$​
​$ x=5$​
解​$:5x=\frac {3}{4}+\frac {1}{4}$​
​$5x=1$​
​$ x=\frac {1}{5}$​
解​$:8x-8=50$​
​$8x=50+8$​
​$8x=58$​
​$ x=\frac {29}{4}$​
14
21
64
0.875