Adding Three-Digit Numbers on an Open Number Line #3

Get even more practice performing three-digit addition using open number lines with this second-grade math worksheet! This one-page worksheet invites students to apply properties of operations while using a number line to add two three-digit whole numbers within 1,000. For each of the five problems, students will begin by plotting the first addend on the open number line, and then mark the addition of each of the hundreds, tens, and ones that make up the second addend until they get to the final sum. This worksheet is a great way to help learners better understand how to use place value when adding three-digit numbers. For more practice, check out Adding Three-Digit Numbers on an Open Number Line #1 and Adding Three-Digit Numbers on an Open Number Line #2!