857乘以1.9减8.57乘以80减85.7等于几,简便计算
问题描述:
857乘以1.9减8.57乘以80减85.7等于几,简便计算
答
857乘以1.9减8.57乘以80减85.7
=85.7×19-52.7×8-85.7×1
=85.7×(19-8-1)
=85.7×10
=857