Rounding can be a challenging skill. Help your students better understand rounding, to the nearest 10 and using interactive number lines, hands-on rounding activities, games and independent practice. Good variety of ideas that totally cover CCSS
Rounding Numbers --- This is a worksheet for students to practise rounding off numbers to assist them in their estimations. This worksheet explores rounding off by and It is aimed at year 3 and 4 but can be used for year 5 if needed!
This is an image from this resource on the Internet4Classrooms' "Fourth Grade Interactive Math Skills - Estimation" resource page: Rounding Off. A fun game to practice rounding. Choose a level and round off numbers to significant figures, decimals places or the nearest 10, 100 or 1000. Shockwave required for this website.
Puddle Jump Numbers Game - great active math game and fun activity for mental maths. I have also used this for colors and made matching color squares. Numbers under 10 work well with the younger children.
Revolving Rifle Marked J.Ch[illegible] - probably J. Chaineux - manufactured in Liège - no serial number, or serial number worn off. pinfire ten-round cylinder, double action, side loading gate and ejector rod.