Subtraction with regrouping

Subtraction with Eggs app provide the simplest way to learn subtraction by regrouping,it can help kids to know how to borrow in subtraction , this app use hatch out birds to help kids understand subtraction and this app dynamic to generate subtraction's questions, so you can get a lot of practice questions.
This is no In-App Purchase version.
There are 3 functions in this app:
Function 1-> Subtract one-digit numbers - up to 10
Function 2->Subtract two-digit numbers - with regrouping
Function 3->Subtraction practices game (Play it,tilt to move left or right.)

The function 2 can help kids learn subtraction with regrouping more easy.
For example: 82-27 =?
you can follow the steps to do subtraction by regrouping:
1. 2 is less than 7, so we need to regroup 1 ten as 10 ones, drag 1 ten to ones’ box.
2. After regroup, there are 7 tens and 12 ones.
3. Click 7 eggs to hatch out 7 birds
4. Click 2 tens eggs to hatch out 20 birds
5. Check the remaining number of eggs, click the right answer's button
It has 3 levels in the function 2,you can click the star button to switch levels:
1 star level : subtraction that don't need regrouping
2 stars level: 2 digits minus 1 digit and need regrouping
3 stars level: 2 digits minus 2 digits and need regrouping

If you are interested in this app, you can watch the following video:
https://www.youtube.com/watch?v=2MVMSE1kIyk

As a MOMs with Apps member,we follow the "Know What's inside" best practices for kids' apps.
http://momswithapps.com/