This math topic focuses on solving for missing values in addition equations involving three-digit numbers. Each problem presents an equation where either the first or the second addend is unknown, and students must determine the missing integer to make the equation true. The problems are designed to enhance fluency with addition and understanding of the structure of number equations. Each equation is followed by multiple choice answers, supporting students in practicing their calculation skills and number sense within the context of addition.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.