a) A = 35.53 - 18
B = 35 + 53.34 = 53.(35 - 1) + 35 = 53.35 - 53 + 35 = 53.35 - 18
\(\Rightarrow\)A = B
b) E = 1998.1998 = 1998.(1996 + 2) = 1998.1996 + 1998.2
F = 1996.2000 = 1996.(1998 + 2) = 1996.1998 + 1996.2
\(\Rightarrow\)E > F
a, 35.53-18 = 35+53.34
b, 1998.1998 > 1996.2000