54+25=____ 70-35=____
30×8=____ 0.8+10.2=____
22×30=____ 35×2=____
某种冰箱经两次降价后从原来的每台2500元降为每台1600元,求平均每次降价的百分率为____.
Fire safety at home
We must not……
We must ……
When there is a fire, we……