Question

 выполните действие  5/6-3/4. 3/10+1/2 .9/20+3/8. 19/75 - 11/50. 13/50-17/75. 11/14 +8/21

Answer 1

5/6-3/4=10/12-9/12=1/12
3/10+1/2=3/10+5/10=8/10=4/5
9/20+3/8=18/40+15/40=33/40
19/75-11/50=38/150-33/150=5/150=1/30
13/50-17/75=39/150-34/150=5/150=1/30
11/14+8/21=33/42+16/42=49/42=1 7/42=1 1/6