Calculation Puzzle (Addition)

･It is a puzzle game which answers using a calculation ability and thinking power. ･There are five difficulty levels. - Beginner : 2×2 - Easy : 3×2 - Normal : 3×3 - Difficult : 4×3 - Expert : 4×4 ･There are 1,500 total issues. [How to play] 1.Choose difficulty level and a number. 2.Carry out the tap of the digit so that button numbers and total values in question may be in agreement. 3.If button numbers and total values in question are in agreement, it will be shown as "CLEAR" and you will advance to the following issue. [Recommended to the following persons] ･Those who want to effectively utilize for the little free time ･Those who want to carry out the brain teaser (brain training) using a digit