4-4/21减13/42简便算法?
3个回答
展开全部
4-(4/21+13/42)
=4-(8/42+13/42)
=4-21/42
=4-1/2
=7/2
=3.5
=4-(8/42+13/42)
=4-21/42
=4-1/2
=7/2
=3.5
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展开全部
4- 4/21 - 13/42
=4-(4/21+13/42)
=4-(8/42+13/42)
=4-21/42
=4-1/2
=3(1/2)
=3.5
=4-(4/21+13/42)
=4-(8/42+13/42)
=4-21/42
=4-1/2
=3(1/2)
=3.5
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评论
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你对这个回答的评价是?
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