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3-4/11-7/1117×13/16
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3-4/11-7/11
17×13/16
17×13/16
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答案和解析
3-4/11-7/11
=3-(4/11+7/11)
=3-1
=2
17×13/16
=(16+1)×13/16
=16×13/16+1×13/16
=13+13/16
=13又16分之13
=3-(4/11+7/11)
=3-1
=2
17×13/16
=(16+1)×13/16
=16×13/16+1×13/16
=13+13/16
=13又16分之13
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