These methods are widely used in schools to practice and learn easily operations such as addition, subtraction and multiplication.
To be very entertaining your children spend time with this application exceeding their own goals.
Math training for learn add and subtract for kids and teens.
► Math for kids and teens
► Track your progress with points system
► Learn how to add
► Learn how to subtract
► Try to beat your score
I love these because I am in the 3 and it is really good to do