The worksheet titled "Adding and Subtracting Rounded Numbers With the Help of Number Lines" allows students to practice adding and subtracting rounded numbers. Sections include number lines that ask how many spots away a certain number is from another before asking them to round larger numbers.

Some sections of the worksheet focus on subtraction problems that allow students to see if a number is closer to one number or another. For example, students subtract 0 from 39 and 39 from 100 to see if 39 is closer to 0 or 100. Other sections ask students to round first before adding or subtracting to get an estimated answer. In some cases, numbers are already rounded to help students get started.

It is important for students to develop a deeper sense of how numbers relate to each other as they begin to add and subtract. By having students learn how to round numbers before adding or subtracting them, they can develop mental math strategies to find the answers to problems. Proximity benchmarks can help them determine how near or far a number is from another number, which helps them develop a deeper number sense, in addition to practicing quantitative reasoning skills.

Students learn about place value too. For example, students could round a number like 23 to the nearest ten. Then they could take 23 minus 10 and 50 minus 23 to see if the number 23 is closer to 10 or 50. These types of problems invite students to think more deeply about numbers and their relationship with each other, which will help them tackle more difficult math concepts in the future.