1, Dabai is a double digit. When two digits are added, the maximum number will not exceed 200, so white =1;

2, if white = 1, big 1+ big 1, the last digit must be 2, fat =2, white chubby =122;

3, so it is deduced backward that big = 6,665,438+0+665,438+0 =122.

Extended data

Application problem is to describe relevant facts in language or words, reflect a certain quantitative relationship, and solve unknown problems. Each application problem includes known conditions and problems.

In the past, China's application problems usually required narrative to meet three requirements: no contradiction, that is, conditions and problems could not be contradictory; Completeness, that is, the condition must be sufficient to ensure that the value of the unknown quantity can be obtained from the condition; Independence, that is, several known conditions cannot be deduced from each other. Mathematics application problems in primary schools are usually divided into two categories: simple application problems that can be solved in one step only by addition, subtraction, multiplication and division; Complex application problems that need two or more operations to solve.

Reference application questions Baidu Encyclopedia