Dau Lem adventure diary is a great integration between entertainment and education. With 5 parts corresponding to 5 grades of primary school, children like to transform into the character Dau Lem to experience exciting adventures through math exercises that follow the textbook program.Vivid images, many close cartoon characters will help Dau Lem become a companion in the learning process of children.Support to familiarize yourself with the application with the first chapter - Only buy when you really like itContents of Grade 4 MathIn grade 3, Dau Lem was brought back to Earth by a flying ball from an alien planet, but unfortunately, the ball landed on the ocean floor. Here, Dau Lem helps the mother turtle find 6 lost baby turtles before the mother turtle carries them ashore. Lets explore the beautiful ocean with Dau Lem to save 6 baby turtles (corresponding to 6 chapters in the 4th grade math curriculum).Contact:* Facebook: http://facebook.com/daulem (like to update promotion information as well as share about teaching apps for kids)* Web: http://www.cnapp.vn/* Phone: 093 784 6000 VND