Welcome to our lesson on the four basic operations. These are the fundamental arithmetic operations used in mathematics: addition, subtraction, multiplication, and division. Each operation has its own symbol and purpose in solving mathematical problems.
Let's explore addition and subtraction in detail. Addition combines two or more numbers to find their total sum. For example, five plus three equals eight. Subtraction takes away one number from another to find the difference. Eight minus three equals five.
Now let's examine multiplication and division. Multiplication is repeated addition of the same number multiple times. Four times three means three groups of four, which equals twelve. Division splits a number into equal groups. Twelve divided by three equals four, showing how twelve items can be arranged into three equal groups of four.
When solving problems with multiple operations, we must follow the order of operations, also known as PEMDAS. This stands for Parentheses, Exponents, Multiplication, Division, Addition, and Subtraction. For example, in two plus three times four, we first multiply three times four to get twelve, then add two to get fourteen.
To summarize what we have learned: The four basic operations are the foundation of arithmetic. Addition combines numbers, subtraction finds differences, multiplication is repeated addition, and division splits numbers into equal groups. Remember to follow the order of operations when solving complex problems.