3RD GRADE USE PLACE VALUE TO ROUND NUMBERS iREADY MATH UNIT 1 LESSON 1 PACK 3RD GRADE USE PLACE VALUE TO ROUND NUMBERS iREADY MATH UNIT 1 LESSON 1 PACK TENS & HUNDREDS. WORKSHEETS, POSTERS / ANCHOR CHARTS, AND EXIT TICKET . This pack is a great addition to any Math Curriculum for Third Grade. It offers your students extensive practice with rounding numbers.