如图所示，一个大长方形被三条线段分成了四个小长方形，各条线段长度见图(单位：厘米)．求：图中所有长方形的周长之和．
直接写出得数．﹣=×= 12×= 1÷=== 1.6×4×0.25= 0÷=
直接写得数．+=÷6=×= 2﹣+=×16= 6﹣=÷=5×÷5×=
直接写得数．===== 75%÷25%===
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直接写出得数．+0.2=+﹣0.2= 5÷=×1.5+3= 3.6×=×1.5=﹣= 1﹣137.5%=
﹣
=
×
= 12×
= 1÷
=
=
= 1.6×4×0.25= 0÷
=
+
=
÷6=
×
= 2﹣
+
=
×16= 6﹣
=
÷
=5×
÷5×
=
=
=
=
= 75%÷25%=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
+0.2=
+
﹣0.2= 5÷
=
×1.5+3=
=
×1.5=
﹣
= 1﹣137.5%=
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