一个长方形和一个半径是20厘米的圆的周长相等，已知长方形的长是40厘米，长方形的宽是多少厘米？
直接写出得数．×1.2= 1÷2= 1.8÷=×÷×= （+﹣）×12= 3﹣÷0.75= 24÷8= 4÷﹣÷4=
直接写出结果×4﹦×﹦ 12÷﹦÷﹦ 12+﹦÷﹦÷6﹦ 9÷﹦×﹦ 12×﹦
直接写出得数．×= 1÷=×= 77：63=÷9=×=÷8= 4：2.5=×=
×= 0×=÷====
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×1.2= 1÷2
= 1.8÷
=
×
÷
+
﹣
）×12= 3﹣
÷0.75= 24
÷8= 4÷
﹣
÷4=
×4﹦
×
﹦ 12÷
﹦
÷
﹦ 12+
﹦
÷
﹦
÷6﹦ 9÷
﹦
×
﹦ 12×
﹦
×
= 1÷
=
×
= 77：63=
÷9=
×
=
÷8= 4：2.5=
×
=
×
= 0×
=
÷
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
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