一道简单的小学数学题！！3根鸡毛！（急）

先分解因式可得 1/2*（1+3/5）+2/5
再合并同类项后可得 1/2*8/5+2/5
=4/5+2/5
整理得 6/5

完成！！

1/2+1/2*3/5+2/5
=1/2(1+3/5)+2/5

=1/2*8/5+2/5

=4/5+2/5

=6/5

1/2+1/2*3/5+2/5
=1/2*(1+3/5)+2/5
=1/2*8/5+2/5
=4/5+2/5
=6/5

1/2+1/2*3/5+2/5
=1-1/2++1/2*3/5+2/5
=1+1/2*（3/5-1）+2/5
=1-1/2*（2/5）+2/5
=1+1/2*（2/5）
=1+1/5
=6/5

1/2×(1＋3/5)＋2/5＝1/2×8/5+2/5=0.8+0.4=1.2

(*是乘号的意思吧???我是按乘号来算的)

1/2+1/2*3/5+2/5=1/2+(1/2-1/5)+2/5=1+1/5=1.2