3 4/8 dikurang 1 koma 2 8koma8 dikurang 3 1/2 1 1/4 ditambah 50 % 4, 5 dikurang 2 5/8 jawabnya pakai cara ya

1). 3 4/8 - 1,2 =
28/8 - 12/10 = 140/40 - 48/40 = 92/40= 23/10 = 2 3/10

2). 8,8 - 3 1/2 =
88/10 - 7/2 = 88/10 - 35/10 = 53/10= 5 3/10

3). 1 1/4 + 50% =
5/4 + 1/2 = 5/4 + 2/4 = 7/4 = 1 3/4

4). 4,5 - 2 5/8 =
45/10 - 21/8 = 180/40 - 105/40 = 75/40= 15/8 = 1 7/8

semoga membantu :)