计算。（1）9个香蕉重1.35千克，平均每个香蕉重多少千克？（2）妈妈买了9个香蕉，共花了6.75元钱，你知道香蕉每个多少元吗？
÷×÷× 120÷ 120×÷21×21．
先看清左右两题之间的关系，再写出得数．========
算一算．×3=×4=×2==÷3=÷4=÷2=÷2=
开火车．
直接写得数===== 9×= 0.8﹣==
÷
÷
×
÷21
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=
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=
=
=
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×3=
×4=
×2=
=
÷3=
÷4=
÷2=
÷2=
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= 9×
= 0.8﹣
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