电子课本网 第55页

第55页

信息发布者:
解:      0.4x=2.6
                   x=6.5
解:         0.65x=13
                        x=20
​$=\frac {1}{31}×(\frac {1}{51}+\frac {50}{51})$​
​$=\frac {1}{31}×1$​
​$=\frac {1}{31}$​
​$=\frac {1}{5}÷\frac {1}{15}$​
​$=3$​
=3600÷0.625
=5760
​$=10+\frac {1}{3}$​
​$=10 \frac {1}{3}$​
=42+2-4
=40
​$=\frac {1}{23}×(\frac {7}{15}-\frac {7}{15})$​
​$=0$​
=3:650
=2:3
2:1
=1:4
=20:9
​$25×(11+\frac {1}{5})=30($​人​$)$​

​$60÷(1-\frac {2}{5})=100($​只​$)$​
​$80×(\frac {1}{4}+\frac {3}{5})=68($​棵​$)$​
答:这两种花共有​$68$​棵。