1. hitunglah hasil dari : a. ( 7/12 2 5/6 ) x ( 1 1/5 – 7/10 ) : b. ( 5/12 : 2 1/6 ) x ( 1 3/5 – 9/10 ) : c. ( 7/8 : 2 5/6 ) x ( 7/8 – 5 1/6 ) :

Jawab:

Penjelasan dengan langkah-langkah:

a (7/12 + 17/6) x (6/5 – 7/10) = (7/12 + 34/12) x (12/10 – 7/10) = 41/12 x 5/10 = 41/12 x 1/2 = 41/24

b. (5/12 : 13/6) x (8/5 – 9/10) = (5/12 x 6/13) x (16/10 – 9/10) = 30/156 x 9/10 = 270/1560

c. (7/8 : 17/6) x (7/8 – 31/6) = (7/8×6/17) x (21/24 – 124/24) = 42/136 x (-103/24) = -206/136 = -103/68