3.6÷(0.28+0.47)÷0.3
312+269=____
4307-2608=____
一块块:____、____、____、____
懒洋洋:____、____、____、____
端端正正:____、____、____、____
各式各样:____、____、____、____
五光十色:____、____、____、____