Kids subtract apples in two-step equations to find a target number.

Help Agent 00K9 defeat the evil El Gato in this subtraction number line game.

Choo-choo! Kids use a number line to solve three-digit subtraction problems in this fun-filled train game.

Kids must quickly add or subtract two-digit numbers to save the day.

Kids help Elliott prepare treasures for her museum by answering word problems by using a tape diagram.