Answers

2016-01-27T13:26:56+05:30
(999)2=1998
(998)22=21956

1998-21956= -19958
0
frist calculate multiplication or division, then + or -
but the given answer is 1997
2016-01-27T13:54:27+05:30
2(999-998*11)
2(998-10978)
2*9978
19956
0