"28除以7+28等于几"...28除以7+28等于几
"74除以28等于几"...74除以28等于几
"-28除以7"...-28除以7
"28除以七十"...28除以七十
"28-28除以7等于几"...28-28除以7等于几
"28除以7+4"...28除以7+4
"28除以7除以1"...28除以7除以1
"28除以7等于多少"...28除以7等于多少
"28除以72等于几"...28除以72等于几
"28除以70等于几"...28除以70等于几
