Esa Helttula

This math app can be used to teach and study the rounding of decimals. You can set your own problems

The Fraction as Slope app provides algebra students a new visual way to think about slope and fracti

The Fraction Math app can be used to teach and study fractions by solving addition, subtraction, div

The German Long Division app can be used to teach and study the German long division method. The use

This math app can be used to teach and study the grid multiplication method. The app is easy to use

This app can be used to teach and study the ancient lattice multiplication method. Solving lattice m

In the Opposite-Change Addition app the user can keep adding a number to one addend and subtract the

This math app is about the concept of order of operations. The user can evaluate random and custom e

This app can be used to teach and study the trade-first subtraction method. The app is easy to use a

This math app is about a multiplication technique introduced by Shri Bharti Krishna Tirthaji in his