(3/4+1/5)×5/19 (12целых1/3-7целых3/4)×6\11

Question

(3/4+1/5)×5/19
(12целых1/3-7целых3/4)×6\11

Answer 1

(3/4+1/5)*5/19=(15/20+4/20)*5/19=19/20*5/19=1/4

(12 1/3 - 7 3/4)*6/11=(12  4/12 - 7 9/12)*6/11=(11 16/12 - 7 9/12)*6/11=

=4 7/12*6/11=55/12*6/11=5/2=2 1/2