【题目】按要求写数.
(1)从9写到19.________、________、________、________、________、________、________、________、________、________、________
(2)从20写到10.________、________、________、________、________、________、________、________、________、________、________
【答案】9 10 11 12 13 14 15 16 17 18 19 20 19 18 17 16 15 14 13 12 11 10
【解析】
略