B.3per6+5per6 C.2 1per3+3per4 D.2per3+3 5per9 E.2per3+2 1per2+3 1per4

3/6 + 5/6 = 8/6 = 1 2/6 = 1 1/3

2 1/3 + 3/4 = 7/3 + 3/4 = 28/12 + 9/12 = 37/12 = 3 1/12

2/3 + 3 5/9 = 2/3 + 32/9 = 6/9 + 32/9 = 38/9 = 4 2/9

2/3 + 2 1/2 + 3 1/4 = 2/3 + 5/2 + 13/3 = 4/6 + 15/6 + 26/6 = 45/6 = 7 3/6 = 7 1/2

maaf kalo slh

b.3/6 + 5/6 = 8/6 (karna penyebutnya sama)
c.21/3 + 3/4 =(penyebut harus disamakan/kpk) 84/12+ 9/12 = 93/12
d.2/3 + 35/9 = (kpk'a 9) 6/9 + 35/9= 41/9
e.2/3+21/2+31/4= (kpk'a 12) 8/12+126/12+ 93/12= 227/12
hanya itu yg bisa saya bantu