It helps children to practice basic operations (multiplication, division, addition, subtraction).
-You can select the number of test questions.
-You can select the level of difficulty all the test questions.
-Questions in each test are different each other.
9Apps 4.9
![국세청 홈택스 [손택스] on 9Apps](https://go.getnew.app/sg/res/jpg/f7/df/69cc2f90120ec331db2630e0f5b6-6dh.jpg?x-oss-process=style/jmq200)
