要非常非常详细的过程
运算是先大括号,再中括号,最后小括号!
然后是先乘除,后加减! {乘除之间可不分先后,加减之间可不分先后}
(-15)÷(1/3减1又1/2减3)×6
=(-15)÷(1/3-1-1/2-3)*6
=(-15)÷(-25/6)*6
=15/25
=3/5
然后是先乘除,后加减! {乘除之间可不分先后,加减之间可不分先后}
(-15)÷(1/3减1又1/2减3)×6
=(-15)÷(1/3-1-1/2-3)*6
=(-15)÷(-25/6)*6
=15/25
=3/5
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第1个回答 2008-09-25
(-15)÷(1/3减1又1/2减3)×6
=(-15)÷(1/3-3/2-3)×6
=(-15)÷(2/6-9/6-18/6)×6
=(-15)÷(-25/6)×6
=15×6/25×6
=108/5
=(-15)÷(1/3-3/2-3)×6
=(-15)÷(2/6-9/6-18/6)×6
=(-15)÷(-25/6)×6
=15×6/25×6
=108/5
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