Find elementary number sense exercises on Math-Drills.com and K5ChalkBox.com, as of 2015. Math-Drills.com provides multiple worksheets on number sense that are available to download for free. K5ChalkBox.com provides a list of activities for elementary students that strengthen number sense skills.
Find elementary number sense exercises on Math-Drills.com by clicking Number Sense Worksheets near the middle of the home page. Click the title of a topic on the next page to view available worksheets. Topics include counting and place value.
To find elementary number sense exercises on K5ChalkBox.com, click Mathematics under the Lesson Plans heading on the home page, then click Building Number Sense on the next page.