The addition table within 10 * * 45 questions are arranged into an addition table in a certain order, which is called the addition table within 10. Vertically, the number in the first column is 2 and the number in the second column is 3. Horizontally, the first line is a few plus 1, the second line is a few plus 2, and the numbers in each line are 1 from left to right.
Extended data:
There are 36 questions in carry addition within 20 * *, which are arranged into a table according to certain rules, which is called carry addition table within 20.
Horizontally, the scores of each question in each row are 1 1, 12, 13, 14, 15, 16, 17.
Vertically, it is arranged according to 9 plus several and 8 plus several ... The first addend of each vertical line is the same. After the second addend, one question is more than the previous one 1, and the sum of the following questions is more than the previous one 1.
An addition table is a table used to find the addition of a number. The result obtained by adding any two one-digit numbers is called addition table, which can be used by beginners. Commonly used addition tables are 10 and 20.
Baidu Encyclopedia-Mathematical Addition Table