列竖式计算，得数保留两位小数．2.18×0.45 6.776÷0.27．
= = == = == =
口算显身手！= = = = == = = =
计算下面各题．40××608×27×．
用颜色涂出每种图形的．并说一说每种图形的的个数一样多吗？为什么？
请观察并计算下列各题，你发现了什么？×= ×= == ﹣= ﹣=﹣= ﹣=
= 
= 
=
= 
= 
=
= 
=
= 
= 
= 
= 
=
= 
= 
= 
=
×60
．
．并说一说每种图形的
×
= 
×
= 
=
= 
﹣
﹣
= 
﹣
=
粤公网安备 44130202000953号