(1)88*[(7/11)-(3/8)]=88*(7/11)-88*(3/8)=56-33=23
(2) 99*(99/100)=(100-1)*(99/100)=100*(99/100)-(99/100)=99-0.99=98.01
(3) (12/13)*(3/7)+(4/7)*(12/13)-( 12/13)
= (12/13)*[(3/7)+(4/7)-1]
= (12/13)*0
=0
(1)88*[(7/11)-(3/8)]=88*(7/11)-88*(3/8)=56-33=23
(2) 99*(99/100)=(100-1)*(99/100)=100*(99/100)-(99/100)=99-0.99=98.01
(3) (12/13)*(3/7)+(4/7)*(12/13)-( 12/13)
= (12/13)*[(3/7)+(4/7)-1]
= (12/13)*0
=0