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数学
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13/9*11/7+13/7*11/2简便计算
十三分之九*十一分之七+十三分之七*十一分之二
简便计算
没看懂,最好给下步骤
人气:454 ℃ 时间:2019-09-29 01:50:15
解答
原式:13/9*11/7+13/7*11/2 调整次序
可改为:13*11/7/9+13*11/7/2,
然后提取13*11/7,成为13*11/7(1/9+1/2)
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简便运算:2/3 +7/12+ 9/20 +11/30+ 13/42=?
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