Question

giúp mình vs mình sẽ theo dõi cho

Answer 1

a: =3/5-3/5-5/7=-5/7

b: =-7/4(3/8+5/8)+7/15*-5/14

=-7/4-35/210

=-7/4-1/6

=-21/12-2/12=-23/12

c: =(0,5-1,2):1,05-(-125/8)-1/12

=25/63+125/8-1/12

=8033/504