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51问答网 > (-13)×三分之二-0.34×七分之二+（-13）×三分之一-七分之五×0.34=?

(-13)×三分之二-0.34×七分之二+（-13）×三分之一-七分之五×0.34=?

快快快，急急急！简便运算！要说出解题思路

2025-03-15 21:27:53

推荐回答（3个）

回答1：

(-13)×三分之二-0.34×七分之二+（-13）×三分之一-七分之五×0.34
=(-13)×三分之二+（-13）×三分之一-(0.34×七分之二+七分之五×0.34)
=(-13)×(三分之二+三分之一)-0.34*(七分之二+七分之五)
=-13*1-0.34*1
=-13.34

回答2：

(-13)×三分之二-0.34×七分之二+（-13）×三分之一-七分之五×0.34
=(-13)×(2/3+1/3)-0.34×(2/7+5/7)
=-13×1-0.34*×1
=-13.34

回答3：

[-13*（三分之一+三分之二）]-[0.34*(七分之五+七分之二)]=-13.34

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