1.一盘西红柿炒鸡蛋,用去鸡蛋150克,每千克6.4元,用去西红柿200克,每千克2.2元,调料约0.6元,利润占成本的
5个回答

1.(0.15×6.4+0.2×2.2+0.6)×(1+60%)

=(0.96+0.44+0.6)×1.6

=2×1.6

=3.2(元)

2.〔(1-20%)×50%〕÷1

=〔0.8×0.5〕÷1

=0.4÷1

=40%