This file contains number lines that show groups of ten. The number lines included are as follows: 10 to 20; 20 to 30; 30 to 40.....up to 140 to 150. I have also included blank number lines to be used as needed.
Number lines can be used for many different number skills (counting, skip-counting, adding, subtracting, etc.). I used this document to help teach the skill of basic rounding to my young students who needed to see which "round numbers" were closest to any given number.