计算下面图形的周长和面积．（单位：厘米）
直接写出得数×15= ×2= ×= ×=1×= ×= ×34= ×=×= ×= ×= ×=
计算．1×4.8 2×3.5 2.3×1 2×0.63．
口算：×15= ×2= ×= ×= ×= 1×=×= ×34= ×= ×= ×= ×=
直接写出得数．×40= ﹣= ×= 2×= 24×=×22= 18×= ×= ×= ×=
计算下面各题×= ×= ×=9××= +×××=
×15= 
×2= 
×
= 
×
=
= 
×
= 
×34= 
×
=
×
= 
×
= 
×
= 
×
=
×4.8 2
×3.5 2.3×1
2
×0.63．
×15= 
×2= 
×
= 
×
= 
×
= 1×
=
×
= 
×34= 
×
= 
×
= 
×
= 
×
=
×40= 
﹣
= 
×
= 2×
= 24×
=
×22= 18×
= 
×
= 
×
= 
×
=
×
= 
×
= 
×
=
×
= 
+
×
×
×
=
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