help po please, kung May computation po kayo patingin Nadin po hehe, thank u in advance

Answer:
31)140
48+22= 70
70X2=140
32)12
10-7=3
36/3=12
12
33) 100
3/4=0.75 4/5 = 0.80
0.80x-0.75x= 0.05x
0.05x=5
5X20=100
34)16, 18
38/2= 17
17-1=16 17+1=18
35)15, 17, 19
51/3=17
17-2=15 17+2=19