Khan Academy: Addition and Subtraction With Number Lines

Hop your way through a mathematical equation with your first grade class as they learn the idea of moving up and down the number line. Adding and subtracting like little frogs is an engaging and clever way to teach/reinforce this concept.

Your first and second math class will develop a higher understanding of addition after using the number line. Word problems are provided, and learners use the number line to illustrate and solve each problem. For advanced learners,...

Given a 2-digit addition or subtraction problem, video demonstrates how to decide which number line matches up with it. [1:56]

Sal adds and subtracts three-digit numbers less than 1000 using a number line. Includes a video, transcript, and question and answer section. [2:24]

Sal solves addition and subtraction equations with number 10 or less. Includes a video, transcript, and question and answer section.

Step by step, two examples of creating number lines are explained through a series of animations. One is meant to watch at home, the second can be viewed in class, and there is a third tab with two sample problems to try. This skill,...

Sal solves addition and subtraction word problems involving exercising gorillas and cookies. Includes a video, transcript, and question and answer section. [5:31]

Understanding the inverse relationship between addition and subtraction is essential for developing fluency in young mathematicians. Zoe and RJ explain how three numbers can form fact families that make two addition and two subtraction...

Once your class has mastered the identification of fractions, have them locate fractions on a number line. This sheet reinforces interval sizes of parts included in a whole, and directly relates to the standards associated with Common...

Use a number line to solve time word problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.