A. 15. (-2) . (-5). (-6) = -900
B. 4. 7 . (-11). (-2) = 616
A) 15.(-2).(-5).(-6)= \(\left[15.\left(-6\right)\right]\) . \(\left[\left(-2\right).\left(-5\right)\right]\)= (-90).10= -900
B)4.7.(-11).(-2)=(4. 7). \(\left[\left(-11\right).\left(-2\right)\right]\) =28. 22= 616