"420-42除以323等于几"...420-42除以323等于几

　"420除以344等于几"...420除以344等于几

　"420除以3315等于几"...420除以3315等于几

　"420除以6×12-286等于几"...420除以6×12-286等于几

　"420除以4028等于几"...420除以4028等于几

　"4293除以42等于几"...4293除以42等于几

　"4220除以41等于几"...4220除以41等于几

　"324除以410等于几"...324除以410等于几

　"420除以372等于几"...420除以372等于几

　"420除以39等于几"...420除以39等于几