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Rounding with Number Lines

Learning to round doesn’t have to be difficult! Provide your students with conceptual understanding by rounding with number lines.


Rounding numbers can be challenging, but it doesn’t have to be! Make rounding easy for your students by using number lines! By teaching conceptually, even struggling students can easily round numbers to the nearest 10 and 100. Using number lines helps students develop a deep understanding so they don’t have to rely on rhymes.

Why teach with number lines?

Number lines are great for visual learners and for students who are developing number sense. Number lines help students see why numbers are rounded the way they are. No more relying on rounding tricks!


What’s Included:

Because some students need more practice than others, there are 12 two-sided worksheets that simplify rounding to the nearest 10 and 100.

  • Rounding to the nearest 10 with 2- and 3-digit numbers
  • Rounding to the nearest 100 with 3- and 4-digit numbers
  • 8 worksheets with regular number lines
  • 4 worksheets with open number lines
  • Suggestions for teaching with number lines
  • Answer keys


This resource was created to support the following 3rd-grade math TEKS:

3.2C – represent a number on a number line as being between two consecutive multiples of 10; 100; 1,000; or 10,000 and use words to describe relative size of numbers in order to round whole numbers

3.4B – round to the nearest 10 or 100 or use compatible numbers to estimate solutions to addition and subtraction problems



What teachers are saying about this rounding numbers resource…

⭐⭐⭐⭐⭐  “This is a great resource. I like using this resource because it provides a great visual for my students to see the 10 or 100 they are rounding to. We worked through many of these together during our rotation work stations and in our guided math times. After a few tries many of my students were able to successfully work them independently. Thanks for a great product.” – Kathryn H.

⭐⭐⭐⭐⭐  “I loved using this resource because it was a good visual for the students to see the 10 or 100 they were rounding to, instead of using the typical technique of round up if it is 5 or above and round down if it is 0 to 4. Many of my students had much more success with this resource. By the end, some of them didn’t even need the number line to help with their rounding skills. Thanks!” – Stacie C.

⭐⭐⭐⭐⭐  “The visuals are important for 3rd grade students to have a deep understanding of rounding. Thank you for a great resource!” – Maria M.

⭐⭐⭐⭐⭐  “My students LOVED this resource so much, they begged me for more “pirate math” ha! Win win win!” – Meredith Z.


You might also like these rounding to the nearest 10 and 100 activities:


View Rounding With Number Lines on Teachers Pay Teachers.


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All rights reserved by author.
Permission for single classroom use only.


SKU# 883820



Math Skill
Math Skill