"850除以四十列竖式计算"...850除以四十列竖式计算
"850除以40等于几"...850除以40等于几
"850除42"...850除42
"854除以四十"...854除以四十
"85除以40"...85除以40
"850除以八十"...850除以八十
"860除以四十"...860除以四十
"850除以三十"...850除以三十
"850除以340"...850除以340
"850除以50"...850除以50