如图是某小学教学楼的平面示意图，设计者在图上只标明了四条线段的长度（单位：米）．请你算出它的周长．
直接写出得数．= = = == = = =
口算．= = 5﹣= =0×1= 1÷= = =
直接写得数．= = = == = = =
直接写得数+= ÷7= ×= ÷=×8= 9÷= 15×= ﹣=÷= ×= ×= ÷=
直接写出得数．+= ×= ÷6= ×8= +=2﹣= 0+= ÷= 1÷= ﹣=
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= 
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=
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= 
= 
=
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= 5﹣
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= 1÷
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=
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+
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÷7= 
×
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÷
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×8= 9÷
= 15×
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﹣
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÷
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×
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÷
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+
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×
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÷6= 
×8= 
+
=
= 0+
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÷
= 1÷
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﹣
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