The addition and subtraction tables in 1 and 10 show that the result of each row is a number, and the result changes from top to bottom, with a gradient of 1.
2. Look at the addition and subtraction table within 10 o'clock vertically, the bottom number is the largest, and the bottom result is one bigger than the previous level. Each level is the result of this level, which is 1 larger than the previous level. Results From top to bottom, the first column is 2.3.4.5.6.7.8.9. 10, and the second column is 3.4.5.6.7.8.9. 10. And so on.
3. Subtraction table within ten. Vertically, the decrease of each column is unchanged, and the final result number of each column increases from top to bottom, with an increasing range of 1. Horizontally, the minuend of each column remains unchanged, and the number of final results decreases from left to right, with a decreasing range of 1.
Extended data:
The addition table is a table for finding one-digit addition. List the results of adding any two one-digit numbers into a table, which is called an addition table and can be used by beginners. Commonly used addition tables are 10 and 20.
Addition is one of the four basic operations, which refers to the calculation of combining two or more numbers and quantities into one number and quantity. The symbol of addition is the plus sign "+". Connect items with a plus sign when adding.
References:
Baidu Encyclopedia-Mathematical Addition Table