Battleship Numberline - GameUp - BrainPOP. In this free online math game, students explore fractions, decimals, and other number concepts by estimating their place on a number line. bVX0-zncj9qJ3G1_r18rkIpQL02X-Oi6tWViR4g4-vwDVmU50WZA-4bRZMjM2TXmc88PAkJ1g0jIembnEbM Rounding Worksheets | Free - CommonCoreSheets Rounding Worksheets. Want to help support the site and remove the ads? Become a patron via patreon. Each worksheet has 20 problems rounding a decimal number to either the tenths or hundredths place or next whole number. Each worksheet has 10 problems estimating an answer.