Khan Academy
Khan Academy: Adding Numbers With Different Signs
Demonstrates with the help of a number line how to add positive and negative 2-digit numbers. [5:32]
Khan Academy
Khan Academy: Adding Numbers With Different Signs
Demonstrates how to use a blank number line to add three 2-digit positive and negative numbers. [5:33]
Khan Academy
Khan Academy: Adding Numbers With Different Signs
Use a number line to add 15 + (-46) + 29.