小学一年级20以内口算题

日期：时间：分数：8 + 4 =15 - 7 =14 - 8 =5 + 7 =14 - 6 =12 - 5 =5 + 8 =13 - 4 =5 + 9 =7 + 4 =13 - 6 =16 - 9 =