First, the addition table
1+ 1=()2+ 1=()3+ 1=()4+ 1=()5+ 1=() 1+2=()2+2=()3+2=()4+2=()5+2=() 1+3=()2+3=()3+3=()4+3=()。
Second, the subtraction table
5- 1=()4- 1=()3- 1=()2- 1=() 1- 1=()。
Third, the application of addition and subtraction
Example 1: Xiaoming has five apples and bought three more. How many apples does he have? Answer: 5+3=8 apples.
Example 2: Xiaohong has five pencils, and she used two. How many pencils does she have left? Answer: 5-2=3 pencils.
Four. abstract
In this tabloid, we learned the basic operations of addition and subtraction within 10, including addition table and subtraction table. Through these tables, we can quickly find the result of adding or subtracting two numbers. At the same time, we also apply these addition and subtraction knowledge through some simple application problems. I hope this tabloid can help you consolidate these basic mathematical knowledge.
The role of mathematics
1. Solving practical problems: Mathematics is a tool that can help us solve many practical problems, such as calculating costs, solving geometric problems, making statistical analysis and forecasting.
2. Cultivate thinking ability: Mathematics is an effective way to cultivate thinking ability. By studying mathematics, we can exercise our logical reasoning ability, abstract thinking ability, imagination and creativity, and improve our ability to solve problems.