Are you looking for a strategy to help your students practice rounding multi-digit numbers? Your students will love how easy it is to practice rounding to the nearest 1,000, 10,000 and 100,000 using a number line! These NO prep, self-checking, interactive, digital Boom Cards are so much fun for students and a huge time saver for teachers! This 4th Grade bundle includes the following 3 sets of Boom Cards focused on using a number line as a strategy to round multi-digit whole numbers:★ Set 1-