15*(-2/3)+(-14)*2/3-2/3 简便计算
问题描述:
15*(-2/3)+(-14)*2/3-2/3 简便计算
答
提取公因式:15*(-2/3)+(-14)*2/3-2/3 =-2/3[15+14+1]=-2/3*30=-20
15*(-2/3)+(-14)*2/3-2/3 简便计算
提取公因式:15*(-2/3)+(-14)*2/3-2/3 =-2/3[15+14+1]=-2/3*30=-20