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18X3/70.65X8/13-2/7*185/13÷1又7/13简便运算,求步骤.清楚明了,快解答

题目详情
18X3/7 0.65X8/13-2/7*18 5/13÷1又7/13 简便运算,求步骤.清楚明了,快解答
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答案和解析

18X3/7 

=(14+4)x3/7 

=14x3/7 +4x3/7 

=6+12/7

=7又5/7


0.65X8/13-2/7*18 

=13/20x8/13-2/7x18 

=2/5-36/7

=14/35-180/35

=-166/35


5/13÷1又7/13

=5/13÷20/13

=5/13x13/20

=5/20

=1/4