Adding Tens on an Open Number Line #2

All aboard for more addition practice using an open number line with the second installment of this first-grade math worksheet! In this one-page addition worksheet, learners will use properties of operations and a number line to add a two-digit multiple of ten to a second two-digit whole number. For each of the five addition problems, students will start by plotting the first two-digit addend on the open number line. From there, students will mark the addition of each of the tens that make up the second addend until they get to the answer.

The second in a series of three, this worksheet is a great way to give students important practice using a concrete model to visualize finding the sum of two numbers. For more practice, check out the other related worksheets: Adding Tens on an Open Number Line #1 and Adding Tens on an Open Number Line #3!