# Everyday Column-Addition

### for iPad and iPhone

This app can be used to teach and study the alternative column-addition method used in the Everyday Mathematics curriculum developed by the University of Chicago School Mathematics Project. The app is easy to use and it has an intuitive interactive interface with customizable colors and other settings.

## The Everyday Column-Addition Method

The method is called column-addition method in the Chicago School Mathematics Project but it is called here the Everyday column-addition method to distinguish it from the standard column addition method.

The Everyday column-addition method was developed and shown to the Everyday Mathematics authors by a first grader. The method has two stages. In the first stage the digits are added one column at a time in each column. After the first stage some columns can have two-digit numbers. In the second stage the carries are done to obtain the result.

## The App is Easy to Use

The numbers are aligned automatically so that you can concentrate on solving the operations for each column. Trading is animated step by step so you can see what happens.

After you solve the operation for each column the correct answer will fly to the right place. If the user presses the wrong button the answer will appear above the keyboard but it will not move.

## Difficulty Can Be Set

- Each number can have from 2 to 5 digits
- Custom and random problems
- The current operation for each column can be hidden
- The operands of the current operation can be highlighted
- Colors of the interface can be changed
- The speed of the animations can be set
- The lines separating the columns can be hidden

## Everyday Column-Addition Videos

## Everyday column-addition with three digit numbers

909 + 787

## Everyday column-addition with five digit numbers

88588 + 12693

## Everyday Column-Addition in the Apple VPP Store for Education

The Volume Purchase Program allows participating educational institutions to purchase iDevBooks math apps in volume and distribute them to students. All iDevBooks math apps offer special 50% discount for purchases of 20 apps or more for participating educational institutions.