Jika diketahui a= 1/3, b=3/4, c=2/5, tentukan nilai operasi berikut: A. axbxc B. ab-ac C. (b-c) x a D. 2ab : c E. 2/3b - 1/2c

a. a×b×c
= 1/3 x 3/4 x 2/5
= 6/60
= 1/10

b. ab - ac
= 1/3 x 3/4 - 1/3 x 2/5
= 3/12 - 2/15
= 1/4 - 2/15
= 15 / 60 - 8 / 60
= 7/60

c.
(b-c) x a
= (3/4 - 2/5) x a
= 15 / 20 - 8 / 20 x 1/3
= 7/20 x 1/3
= 7/60

d.
2ab : c
= 2 . 1/3 . 3/4 : 2/5
= 6/12 x 5/2
= 1/2 x 5/2
= 5/4

e.......

Diketahui :
A = 1 / 3
B = 3 / 4
C = 2 / 5

Penyelesaian :
A) A x B x C
= (1/3) x (3/4) x (2/5)
= (3/12) x (2/5)
= 6 / 60
= 1 / 10

B) (A x B) - (A x C)
= ( (1/3) x (3/4) ) - ( (1/3) x (2/5) )
= (3/12) - (2/15)
= (15/60) - (8/60)
= 7 / 60

C) (B - C) x A
= ( (3/4) - (2/5) ) x (1/3)
= ( (15/20) - (8/20) ) x (1/3)
= (7/20) x (1/3)
= 7 / 60

D) 2A x B : C
= 2 (1/3) x (3/4) : 2/5
= (2/3) x (3/4) x (5/2) --> (dibalik)
= (6/ 12) x (5/2)
= 30 / 24
= 15 / 12
= 5 / 4

E) 2/3 B - 1/2 C
= ( (2/3) x (3/4) ) - ( (1/2) x (2/5) )
= (6/12) - (2/10)
= (30/60) - (12/60)
= 18 / 60
= 9 / 30
= 3 / 10


Semoga membantu ^_^