Addition
Addition means combining two or more numbers to get a total called the sum.
Example: 4,563 + 2,178
4,563 + 2,178 ------- 6,741
Always start from the right (units column). Carry over when a column exceeds 9.
Subtraction
Subtraction means finding the difference between two numbers.
Example: 7,852 − 3,419
7,852 - 3,419 ------- 4,433
When the top digit is smaller than the bottom, borrow from the next column.
Word Problem
A school has 2,450 students. 875 are absent today. How many are present?
Solution: 2,450 − 875 = 1,575 students are present.
💡 Always check your answer by adding the result back to the number subtracted.