Educational Mathematics apps for iPhone, iPad and iPod Touch

Partial Sums Addition

(download from the App Store)

The Partial Sums Addition app lets the user to solve random addition problems using the partial sums addition method.

In the Everyday Mathematics curriculum the partial sums method is the focus algorithm for addition.

Everyday Column-Addition

(download from the App Store)

The Everyday Column-Addition app can be used to teach and study the column-addition method.

In the Everyday Mathematics curriculum the column-addition method is one of the algorithms for addition. This is not the same algorithm than the standard column addition.

Partial Differences Subtraction

(download from the App Store)

The Partial Differences Subtraction app lets the user to solve random subtraction problems using the partial differences subtraction method.

In the Everyday Mathematics curriculum the partial differences method is one of the algorithms for subtraction.

Left-to-Right Subtraction

(download from the App Store)

The Left-to-Right Subtraction app can be used to teach and study the left-to-right subtraction method.

In the Everyday Mathematics curriculum the left-to-right method is one of the algorithms for subtraction.

Trade-First Subtraction

(download from the App Store)

The Trade-First Subtraction app lets the user to solve random subtraction problems using the trade-first subtraction method.

In the Everyday Mathematics curriculum the trade-first method is the focus algorithm for subtraction.

Lattice Multiplication

(download from the App Store)

Lattice multiplication is algorithmically equivalent to long multiplication. A lattice (a grid) guides the calculation. All the multiplications are done first and then the additions. The method was introduced to Europe in 1202 in Fibonacci's Liber Abaci.

Partial Products Multiplication

(download from the App Store)

The Partial Products app lets the user to solve random multiplication problems using the partial products method.

In the Everyday Mathematics curriculum the partial products method is the focus algorithm for multiplication.

Column Division

(download from the App Store)

The Column Division app lets the user to solve random division problems using the column divison method.

In the Everyday Mathematics curriculum the column division method is one of the algorithms for division.

Same-change Subtraction

(download from the App Store)

The Same-change app lets the user to solve random subtraction problems using the partial products method.

Opposite-change Addition

(Coming soon)

The Opposite-change app lets the user to solve random addition problems using the partial products method.