Basic Computation 1

The four basic operations of arithmetic are addition, subtraction, multiplication, and division.

Basic Addition and Subtraction

Addition

The plus symbol is used when we are adding. Addition of two numbers is the total amount of those values combined.

Example: 2 and 2 is equal to 4. The mathematical expression is 2 + 2 = 4

Practice is important when counting. You get better when you practice.


Subtraction

The minus symbol is used when we are subtracting. We take one number away from another to find out what is left.

Example: 5 minus 2 is equal to 3. The mathematical expression is 5 – 2 = 3

Subtraction is the opposite of addition.

More on Addition and Subtraction

Worksheets: Addition and Subtraction


Activity:

Look at the pictures below. Write subtraction stories and solve the problem. The first one was done for you.

Jane bought eggs from the grocery store. She used four to make muffins. How many eggs remain in the basket?

Answer = 10 – 4 = 6