Add numbers together

Basic gameplay: Five numbers are rounded up to multiples of ten to get points.
Single gameplay: Only one number in the bottom two rows of numbers can be rounded up to a multiple of ten. Choose it to enter the next level.
Difficult gameplay: There are more than one numbers in the bottom two rows of cards that can be rounded up to multiples of ten, select them to enter the next level.
Description: This game is designed to test the mental arithmetic and hands-on ability of scoring, time-keeping, leisure and entertainment, a stand-alone game that is not connected to the Internet, and does not participate in or involves any illegal activities. At the same time, everyone is welcome to supervise and encourage!