Interactive Mathematical Learning Courseware 2.0 (iMLc2.0) is an enhanced version of multimedia application which aims to expose the pre-school children in mental arithmetic technique with; (i) larger range of numbers, (ii) implementation of standard written method and, (iii) video support to visualize both techniques. The application integrates all multimedia elements and mental arithmetic techniques in interactive and supportive ways which are suitable for pre-school children. It is divided into three modules, addition, subtraction, and quizzes. The addition operation has been designed to apply the finger-brain approach which is a part of mental arithmetic technique while, mental-imagery approach is adapted for subtraction operation. Experimental test and user acceptance test have been conducted to evaluate the application. The implementation of iMLC2.0 in enriched interactive multimedia environment can be used as additional teaching and learning tool since it is supportive and attractive. In addition, it can motivate the preschooler to be prepared for future mathematical learning.