把一个边长是8厘米的正方形纸裁成4个完全一样的小正方形，这4个小正方形的周长和比原来的大正方形周长增加了多少？
直接写得数．= = = == = = （﹣）×30=
直接写出得数．14×= ×5= ×= 12×= 3×=7×= 4.8+0.82= 3﹣2.7= （+2）×9= （﹣）×2=
口算题．×= ×= ×9= ××0=+= ×11= 5﹣﹣= ×9×7=
口算×15= ×2= ×= ×= ×=1×= ×= ×34= ×= ×=×= ×= ×= ×= ×=×24= ×= ×30= 28×= ×=
直接写出得数×15= ×2= ×= ×=1×= ×= ×34= ×=×= ×= ×= ×=
= 
= 
= 
=
= 
= 
= （
﹣
）×30=
= 
×5= 
×
= 12×
= 3×
=
= 4.8+0.82= 3
﹣2.7= （
+2）×9= （
﹣
）×2=
×
= 
×
= 
×9= 
×
×0=
+
= 
×11= 5﹣
﹣
= 
×9×7=
×15= 
×2= 
×
= 
×
= 
×
=
= 
×
= 
×34= 
×
= 
×
=
×
= 
×
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×
= 
×
= 
×
=
×24= 
×
= 
×30= 28×
= 
×
=
×15= 
×2= 
×
= 
×
=
= 
×
= 
×34= 
×
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×
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×
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×
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