Use number lines to support number sense. Make a number with painter's tape and use 50 and 100 as benchmarks. Great way to teach number place. Could be adapted for whole class instruction.

Strategies for teaching addition and subtraction using open number lines, a Common Core grade math skill

Specific Expectations: investigate addition and subtraction in everyday activities through the use of manipulatives, visual models, or oral exploration

Open Number Lines: Task Cards {Addition and Subtraction} More

empty number line worksheet- double digit numbers

We are up to our elbows in addition AND subtraction. According to the new Common Core Standards the traditional algorithm is a fourth grade standard Fluently add and subtract multi-digit whole numbers using the standard algorithm. We …

Strategies for teaching addition and subtraction using open number lines, a Common Core grade math skill

Math Coach's Corner: Open Number Line Addition Great idea!

The Classroom Key: Open Number Lines Explained