Rounding in centimeters may sound tricky, but it's just like rounding to the nearest ten or hundred. To figure it out, measure an object. If the length is at or over the half centimeter mark, round up. If not, round down. This ruler worksheet is sure to help your child wrap her head around this tricky concept. Cut out the ruler, and let's get measuring!

Click here to practice rounding in inches, or check out the entire ruler series here.