"54-6除以6等于几"...54-6除以6等于几

　"54除以6+5等于几"...54除以6+5等于几

　"54-54除以6-3等于几"...54-54除以6-3等于几

　"54+36除以6等于几"...54+36除以6等于几

　"54-42除以6等于几"...54-42除以6等于几

　"54+6除以72等于几"...54+6除以72等于几

　"54+48除以6等于几"...54+48除以6等于几

　"54-48除以6等于几"...54-48除以6等于几

　"54除以6+7等于几"...54除以6+7等于几

　"54除以6和54等于几"...54除以6和54等于几