(28,71+1,29) * 16,43 =?19,6*6,7+19,6*3,3=?63,4-195,2-195,2*53,4=?

Question

(28,71+1,29) * 16,43 =?
19,6*6,7+19,6*3,3=?
63,4-195,2-195,2*53,4=?

Answer 1

(28,71+1,29)* 16,43 = 30*16,43 = 492,9
19,6*6,7+19,6*3,3 = 19,6*(6,7+3,3) = 196
63,4-195,2-195,2*53,4 = -10555,48