如题所述
你好,很高兴为你解答
1/2-括号3/4-3/5括号除以7/10最后结果等于多少
=1/2-(15/20-12/20)x10/7
=1/2-3/20x10/7
=1/2-3/14
=7/14-3/14
=2/7
满意采纳哦!追答
1/2-括号3/4-3/5括号除以7/10最后结果等于多少
=1/2-(15/20-12/20)x10/7
=1/2-3/20x10/7
=1/2-3/14
=7/14-3/14
=2/7
满意采纳哦!追答
先算括号里的
通分再计算
温馨提示:答案为网友推荐,仅供参考
第1个回答 2017-12-16
1/2-(3/4-3/5)÷7/10
=1/2-(15/20-12/20)x10/7
=1/2-3/20x10/7
=1/2-3/14
=7/14-3/14
=4/14
=2/7本回答被网友采纳
=1/2-(15/20-12/20)x10/7
=1/2-3/20x10/7
=1/2-3/14
=7/14-3/14
=4/14
=2/7本回答被网友采纳
第2个回答 2020-03-30
1/2-(3/4-3/5)÷7/10
=1/2-3/20÷7/10
=1/2-3/14
=2/7
=1/2-3/20÷7/10
=1/2-3/14
=2/7