"650除以250"...650除以250
"650+200除以2等于几"...650+200除以2等于几
"630除以二百"...630除以二百
"六百除以250"...六百除以250
"2600除以650等于几"...2600除以650等于几
"680除以二百"...680除以二百
"620除以二百"...620除以二百
"650除以三百"...650除以三百
"650除以二十"...650除以二十
"650除以六百"...650除以六百