下面各题写出必要的计算过程．×= 16×= ×= ×1100=
看谁算得又对又快．======．
3与4的倒数之差是多少？
算一算．+=﹣=+=+=﹣=﹣=
+= 1﹣=+=+= 1﹣=+=﹣=﹣=
直接写出得数．﹣=+=﹣=+=﹣=﹣=
×
= 16×
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= 
×1100=
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=．
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﹣
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﹣
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﹣
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= 1﹣
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﹣
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﹣
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﹣
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﹣
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﹣
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﹣
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