（1/6+1/9-1/12）x4x9
=1/6x36+1/9x36-1/12x36
=6+4-3
=7某工厂共有职工1240人,如职工的8分之3与男职工的5分之2同样多,求男女职工个有多少?女：男＝2/5：3/8＝16：15男的 1240x15/(16+15)=600女 1240-600＝640小强从家到2000米的学校，去时是上坡，用了25分钟，回来是下坡，用了15分钟，求小强的平均速度你还是发问题吧 发地址
用简便方法计算:六分之一加九分之一减一十二分之一括号×四乘九
用简便方法计算:六分之一加九分之一减一十二分之一括号×四乘九
数学人气：519 ℃时间：2019-09-17 17:08:25
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