用一条绳子在边长是80厘米的正方形桌面绕5周，一共需要绳子多少厘米？
把3块蛋糕平均分给7个人，每人分得多少块？
直接计算= = = = = =
除以真分数，商一定小于被除数． ．
直接写出得数．①= ②= ③= ④=⑤= ⑥= ⑦= ⑧=⑨= ⑩1÷6÷3=
直接写出结果：10÷= ÷= ×= ﹢=×= ×= ﹣= ÷4=
= 
= 
= 
= 
= 
=
= ②
= ③
= ④
=
= ⑥
= ⑦
= ⑧
=
= ⑩1÷6÷3=
= 
÷
= 
×
= 
﹢
=
×
= 
×
= 
﹣
= 
÷4=
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