Common Core math · 3rd grade
Round whole numbers to the nearest 10 or 100.
3.NBT.A.1 is part of the Common Core State Standards for Mathematics. Rounding Hills practices it. Standards vary by state, so check with your kid’s teacher for the exact match.
Rounding Hills: A roller coaster shows rounding as a ride. The valleys are the tens (or hundreds) on either side and the peak is the halfway mark, so a number rolls down into the one it rounds to. Kids round to the nearest 10 and 100, find which number rounds to a target, then round to estimate a sum or difference.