Tolong pliss No 5 sampai 12 berserta cara

2 1/2 - 1/2 : ( 1 7/8 × 0,4 ) =
2 1/2 - 1/2 : ( 15/8 × 2/5 ) =
2 1/2 - 1/2 : 3/4 =
2 1/2 - 1/2 × 4/3 =
2 1/2 - 2/3 =
2 3/6 - 4/6 =
1 9/6 - 4/6 =
1 5/6
1 3/4 - ( 3/5 + 15% ) : 1 1/2 =
1 3/4 - ( 3/5 + 3/20 ) : 1 1/2 =
1 3/4 - ( 12/20 + 3/20 ) : 1 1/2 =
1 3/4 - 15/20 : 3/2 =
1 3/4 - 15/20 × 2/3 =
1 3/4 - 1/2 =
1 3/4 - 2/4 =
1 1/4
2/3 × ( 1/2 - 1/4 : 4/5 ) =
2/3 × ( 1/2 - 1/4 × 5/4 ) =
2/3 × ( 1/2 - 5/16 ) =
2/3 × ( 8/16 - 5/16 ) =
2/3 × 3/16 =
1/8
( 7 3/4 + 2 1/2 ) × 40% : 2/5 =
( 7 3/4 + 2 2/4 ) × 40% : 2/5 =
9 5/4 × 40% : 2/5 =
41/4 × 40/100 × 5/2 =
41/4 = 10 1/4
2,125 + 0,3 × 2 5/6 - 5/6 =
2 1/8 + 3/10 × 17/6 - 5/6 =
2 1/8 + 17/20 - 5/6 =
2 15/120 + 102/120 - 100/120 =
2 117/120 - 100/120 =
2 17/120