Algebra2go: Introduction to Subtraction

Here is a quick 15 minute instructional activity intended to introduce subtraction. Learners count and subtract gummy bears to complete 5 problems. The lessons suggest that the gummy bears can be saved and used the next day, but gummy...

Problem solve using exponents. Pupils read One Grain of Rice: A Mathematical Folktale and write powers to represent amounts from the story.They compare actual solutions to their predictions and play a game to practice using...

Sal illustrates more involved equations in this last video in a series. It follows "Simple Equations" and "Equations 2". He continues using color-coded markings to help increase students' understanding of a more complicated equation:...

Who needs parentheses, anyway? Understanding how to apply the distributive property—and how to get rid of parentheses—helps scholars conceptually understand why it is necessary. Guided practice problems help build confidence to create...

This resource has three problem sets to practice subtraction. Select a problem set, then select a question. Fill in the blank with the correct answer for each problem. When you have answered all of the questions, ask Charlie how you did.

Sal talks about what it means to subtract using objects. Includes a video, transcript, and question and answer section. [3:37]

A number line is used to introduced basic division problems with remainders. The technique of using products to verify correct quotients is also demonstrated.

This resource has three sets of problems. Each set has six questions for practicing division operation. Select a problem set, then select a question. Fill in the blank with the correct answer for each problem. When you have answered all...

In this video tutorial, Professor Perez uses number lines and mathematical expressions to visually review addition and subtraction. [7:42]

Examine how addition, subtraction, multiplication, and division relate to and are separate from each other. As they listen to the book, The Doorbell Rang, they demonstrate the math described in the story by cutting up paper cookies...