Ahhh... the dreaded "estimation" unit! Help students practice adding and subtracting while estimating with this fun and tasty looking Google Slides activity. Use in whole group, small group, or for independent practice to help students estimate while adding and subtracting whole numbers.On each slide, students are asked to estimate the difference or sum by rounding to a specific place value (tens, hundreds, thousands, or greatest place value). Students will rewrite (or type) these new numbers in