妈妈要在一块长125厘米、宽66厘米的长方形桌布四周逢上一圈花边，至少需要买多少厘米长的花边？（将答案凑整到十位）
直接写得数.﹣=+= 3﹣=+=
请选择合适的方法计算下面各题． 1﹣﹣﹣+++﹣﹣+﹣．
直接写出得数： ①= ②= ③= ④= ⑤= ⑥= ⑦= ⑧=
直接写得数．+=+=+=﹣=+= 0.4+=﹣=﹣=+=+=
直接写出得数．= 5﹣== 0.5×0.5÷5==﹣== 0.4×25﹣10==﹣= 1+==
﹣
=
+
= 3﹣
=
+
=
﹣
﹣
+
+
+
﹣
﹣
+
﹣
．
= ②
= ③
= ④
=
= ⑥
= ⑦
= ⑧
=
+
=
+
+
=
﹣
=
+
=
=
﹣
=
﹣
=
+
=
=
= 5﹣
=
= 0.5×0.5÷5=
=
﹣
=
= 0.4×25﹣10=
=
﹣
=
=
=
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