Common Core
2.MD.B.6
2 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Grade 2 Math · Chapter 2 · Lesson 8
Take the object away and the ruler becomes a number line.
Grade 2 Math · Chapter 2 · Lesson 9
Adding and Subtracting on a Number Line
A jump forward adds. A jump back takes away.