第59页

信息发布者：
0.63
0.936
0.07
0.005
43
3
3
1
50
4
200
8
​$=\frac {2}{5}×(7.25+2.75)$​
​$=\frac {2}{5}×10$​
​$=4$​
​$=3+\frac {1}{11}-\frac {1}{11}$​
​$=3$​
=8+2-3
=7
​$=\frac {15}{19}×(\frac {23}{30}+\frac {7}{30})$​
​$=\frac {15}{19}×1$​
​$=\frac {15}{19}$​
​$=\frac {4}{5}×(\frac {3}{8}-\frac {1}{8})$​
​$=\frac {4}{5}×\frac {1}{4}$​
​$=\frac {1}{5}$​
​$=(\frac {1}{5}+\frac {1}{2})×\frac {5}{8}$​
​$=\frac {1}{8}+\frac {5}{16}$​
​$=\frac {7}{16}$​
128
78.125
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