做一做．（1）请你试着用肢体语言表示出垂直或平行，并请同桌判断．（2）把一张纸对折两次，使折痕互相垂直．（3）把一张纸对折两次，产生三条折痕，并使折痕互相平行．
在图中，先用斜线表示×计算结果，再填写结果．
直接写出得数．×=====+=== 5÷3==
直接写得数= 32×25%= 0.75+2.5= 3600÷30==×5= 0.32= 4×25﹣25= ×0.5=1 1÷10+0.9=（）×20==
直接写得数：+=÷= 1﹣5÷8=×=×= 0.9+99×0.9= 1÷0.6= 14÷35=÷×÷= 17.3÷1.73=
直接写出得数+=+=﹣0.125=﹣=+0.3= 10﹣=×=×=×= 10×=
×
计算结果，再填写结果．
×
=
=
=
=
=
+
=
=
= 5÷3=
=
= 32×25%= 0.75+2.5= 3600÷30=
=
×5= 0.32= 4×25﹣25=
）×20=
=
+
=
÷
= 1﹣5÷8=
×
×
=
÷
+
=
+
=
﹣0.125=
﹣
=
+0.3=
=
×
=
×
=
×
= 10×
=
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