Adding means finding the total or sum when you combine two or more numbers. Subtracting means finding how much is left or the difference when one number is taken away from another.
When you add, numbers get larger. When you subtract, numbers get smaller. Always check your operation before solving!
To solve word problems, carefully read each question to understand what is being asked. Decide whether you need to add or subtract, then show your work step by step.
Look for clue words! Words like “in all,” “total,” and “combined” often mean addition. Words like “left,” “difference,” and “how many more” often mean subtraction.
When adding or subtracting multi-digit numbers, line up the digits by place value — ones under ones, tens under tens, and so on. This helps you regroup correctly and get accurate results.
Always align numbers correctly before solving. Double-check each step, especially when regrouping tens, hundreds, or thousands.
Let’s look at how addition and subtraction appear in real-life word problems.
Write a complete sentence for your answer. Example: “Maria has 845 seashells in all.” This helps explain your thinking clearly.
After solving, use the opposite operation to check your answer. This helps you confirm that your work is correct.
Checking your work builds confidence and prevents simple mistakes. Always take a moment to review your final answer.