Subtraction is the mathematical operation of taking one number away from another. It is the opposite of addition. When we subtract, we are finding the difference between two numbers.
The symbol used to represent subtraction is "-", which is called the minus sign. In an equation such as 10 - 5, the minus sign indicates that we are subtracting 5 from 10.
Let's look at an example: 8 - 3. This means we start with the number 8 and take away 3. After subtracting, we are left with the difference, which is 5. So, 8 - 3 = 5.
There are various strategies for subtraction, such as using a number line, using manipulatives like counters or blocks, or using mental math techniques. These strategies can help young learners understand and visualize the concept of subtraction.