Math apps for a firstgrader

Some work in progress apps you can use and experiment with to teach math to your firstgrader. These apps will generate random ready for print sheets.

Usage

Substraction:

ruby app-subtraction.rb > exercise.html

Addition:

ruby app-addition.rb > exercise.html

Mixed:

ruby app-mixed.rb > exercise.html

open exercise.html

Hit Ctrl+P (Cmd+P on macOS)