A:象形文字
B:阿拉伯数字
C:《汉谟拉比法典》
D:楔形文字
炒 吵 妙
巧____ ____菜 ____闹
烧 浇 绕
围____ ____烤 ____花
____ ____ Bob____Who is that?
415 + 715 =____
56 ﹣ 16 =____
25 + 25 =____
34 ﹣ 14 =____
12 + 12 =____
13 + 14 =____
15 ﹣ 18 =____
2﹣ 34 =____
1﹣ 18 ﹣ 38 =____