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合理计算:11/5×186/5-21/10-181/5×21/10
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合理计算:11/5×186/5-21/10-181/5×21/10
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答案和解析
原式=11/5+186/5-(21/10+181/5*21/10)
=11/5+186/5-21/10(1+181/5)
=11/5+186/5-21/10*186/5
=186/5(11/5-21/10)
=93/25
=11/5+186/5-21/10(1+181/5)
=11/5+186/5-21/10*186/5
=186/5(11/5-21/10)
=93/25
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