Calculated column, measures and evaluation context

hi, Anonymous 

in check_2 you gave only row context(because of calculated column )  you miss filter context 

so when you wrap your code in calculate () it give filter context beacuse calculate() is filter modifier.

context transition happen only and only when both   1.row context and   2.filter context present in code.

that's why in Check_2 you get 165 becuase of missing of filter context
when you wrap your code in CALCULATE() it give row context.

and it use expanded table that's why it evaluate even direct relationship is not present

in Check_1 you use measure
and  in measure Calculate() present Internally that's why don't need to use Calculate().