tolong jawab please pake cara ya..... 1. (4 : 2 1/2) - (1/7 + 1/14) =........ 2. 12 3/4 - (4 1/3 : 3/4) =.........

1.
(4 : 2 1/2) - (1/7 + 1/14) =
(4/1 ÷ 5/2) - {1/(7×2) + 1/14}
(4/1 × 2/5) - (1/14 + 1/14)
8/5 - 2/14
8/5 - 1/7
56/35 - 5/35
51/35
1 16/35

2.
12 3/4 - (4 1/3 : 3/4)
51/4 - ( 13/3 : 3/4 )
51/4 - (13/3 × 4/3)
51/4 - 52/9
306/24 - 156/24
150/24
50/8
6 2/8
6 1/4