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Addition with Base Ten Blocks
Numbers & Operations in Base Ten
Grade 1Common Core 1.NBT.C.420 minutes
Learning Objectives
- Understand how to use base ten blocks for addition
- Add two-digit numbers using place value concepts
- Learn about regrouping when the sum of ones is 10 or more
Addition Using Place Value
Base ten blocks are powerful tools that help us understand addition by visually representing the process. When we add numbers, we need to pay attention to place value - we add ones to ones, and tens to tens.
Remember
When adding, we always start with the ones place (the rightmost digit) and then move to the tens place.
Types of Base Ten Blocks
| Tens | Ones |
|---|---|
 |  |
| Rod | Unit |
| Equal to 10 unit cubes connected in a row. | The basic building block representing one unit. |