Answer not method please

Dear student, 
In question number 5 you have to add or subtract the number given in the top of every column from the numbers given in 1 column 

for example 
a. 
475021 | add 10-->> 475021+10=475031 | subtract 10-->>475021-10=475011 |

similarly you have to do for all the rows. 

Hope this information will clear your doubts about topic 
Regards