Word problems. - 6th class

Word problems. - 6th class.
The population of four cities a,b,c and d are d are 89836275,57364212,48936778 and 98696050 respectively.What is the total population of these cities?

Population of A =                           89836275
Population of B =                            57364212
Population of C =                           48936778
Population of D =          (+)             98696050
                                                   ___________
        total population           =           294833315
                                                   ___________
Hence,the total population of the four cities is 294833315.