Do you know the number
Numbers are symbols that we often use in our daily life. We can express quantity, time, age and so on by numbers. The first book of the second grade mathematics book needs to know the number of 0- 100 and learn to express the quantity with numbers. Here are the steps to recognize numbers:
1. Understand the symbols and names of numbers. The symbols and names of the numbers 0-9 are: 0 zero, 1 1, 2 two, 3 three, 4 four, 5 five, 6 six, 7 seven, 8 eight and 9 nine respectively.
2. Know two digits. Two digits are numbers consisting of ten digits and single digits. For example, in the number 12, 1 is ten digits and 2 is a single digit.
3. Learn to use numbers to represent quantity. For example, three apples can be represented by the number 3.
count
Counting is the way we use numbers to represent quantities. The first book of mathematics in the second day of junior high school needs to learn to count with numbers and learn to solve practical problems with counting. The following are the steps of counting:
1. Count from 1. We count from 1, and as many as we count, it means how many.
2. Count to 10. After counting to 10, we can use two digits to represent the quantity.
3. Count to 20. After counting to 20, we can use two digits to represent the quantity.
4. Count to 100. After counting to 100, we can use three digits to represent the quantity.
5. Solve practical problems by counting. For example, we can use counting to solve the following problems: Xiaoming has 5 apples and Xiaohong has 3 apples. How many apples do they have?
summary
By knowing numbers and counting, we can begin to perform more complex mathematical operations. The first book of the second grade mathematics book needs to master the basic steps of knowing numbers and counting, learn to express quantities with numbers, and solve practical problems with counting. This is the first step in mathematics learning, and it is also a very important step.