add
Addition is one of the most basic mathematical operations, which allows us to add two or more values to get a new value. In the first volume of mathematics teaching in grade four, we will learn how to do simple addition.
Operating steps:
1. Write two or more values together and connect them with a plus sign (+).
2. Align each number from right to left.
3. Add each number from the rightmost number.
If the result of addition exceeds 9, you need to carry it.
5. Add up each number to get the final result.
For example, calculate 10+5:
10
+5
-
15
subtraction
Subtraction is also one of the basic mathematical operations, which allows us to calculate the difference between two values. In the first volume of mathematics teaching in grade four, we will learn how to do simple subtraction.
Operating steps:
1. Write the minuend above the minus sign and the minuend below.
2. Align each number from right to left.
3. Starting from the rightmost digit, subtract the low digit from the high digit.
If you need to borrow, you need to borrow from the last digit.
5. Subtract each number to get the final result.
For example, calculate 10-5:
10
-5
-
five
increase
Multiplication is to multiply two or more values to get a new value. In the first volume of mathematics teaching in grade four, we will learn how to do simple multiplication.
Operating steps:
1. Arranges two values vertically.
2. Align each number from right to left.
3. Starting from the rightmost digit, multiply the low digit by the high digit respectively.
4. Multiply each number to get an intermediate result.
5. Add the intermediate results to get the final result.
For example, calculate 10×5:
10
×? five
-
50
separate
Division is to divide a numerical value into several equal parts. In the first volume of mathematics teaching in grade four, we will learn how to do simple division.
Operating steps:
1. Divider write the dividend above and the divisor below.
2. Align each number from left to right.
3. Divide the following number by the above number to get the quotient.
4. Write the quotient above and the remainder below.
5. Divide the remainder by the above number to get a new quotient and remainder.
6. Repeat steps 4 and 5 until the remainder is 0.
For example, calculate 10÷5:
2
-
5| 10
-
In the teaching of the first volume of the fourth grade mathematics, we will master these basic mathematical operations through practice and practice. These basic operations will be the basis of our future mathematics study and help us to better understand mathematical concepts and solve practical problems.