Boofus Quiz-O-Rama | Three-Digit Addition and Adding 10 Game

Boofus Quiz-O-Rama - Adding 10 to three-digit numbers is an awesome game to help your child practice number sense and place value. Go for a new high score every time you play!

Common Core Math Standards

Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.


Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.