Question

Va rog ajutati ma cu ex 5

Answer 1

a)9/5 : (3/4•8/21+1)-4/9

=9/5:(2/7+7/7)-4/5

=9/5:9/7-4/9

=9/5•7/9-4/5=7/5-4/9=63/45-20/45

=43/45

b)(3/7:8/63-5/2)•8

=(3/7•63/8-5/2)•8

=(27/8-5/2)•8

=7/8•8/1=7

c)(1/12+1/24-1/36):(1/4+3/5)•17/7

=7/72:27/20•17/4

=7/72•20/27•17/4

=595/1944

d)(24/8+3/8):(4/35-1/20)•4/15

=27/8:9/140•4/15

=27/8•140/9•4/15

=3/2•140•1/15

=3/2•28•1/3

=1/2•28

=14