Three-digit addition is adding numbers that are between 100 and 999. We add the hundreds, tens, and ones places to find the total.
Always line up numbers by place value: hundreds under hundreds, tens under tens, and ones under ones.
The break apart method means separating numbers into hundreds, tens, and ones before adding. This makes big numbers easier to solve step by step.
When the ones add up to a number greater than 9, regroup into tens and ones. Example: 11 = 10 + 1.
Breaking apart numbers helps you see place value clearly. It shows how hundreds, tens, and ones work together in addition.
This method helps you solve problems mentally and check your work more easily.
We use three-digit addition to solve real-world problems, like adding prices, distances, or scores.
Always check if your answer makes sense in the real-world situation. Estimating first can help.