Add 10 to a 3-Digit Number: Missing Numbers Worksheet

This add 10 to a 3-digit number worksheet consists of a set of questions on addition, which help students develop fluency. In this worksheet, students practice solving problems written in the horizontal format. How numbers are laid out in a problem affects the method a student employs to solve it. Therefore to develop actual fluency and mastery of multiple strategies, students must practice different formats.