tolong dong dijawab besok di kumpulin

1) 3 2/5+ 15%:18= 17/5+ 15/100: 18
=34/10+15/100 :18/1
= 340/ 100+15/100:18/1
= 355/100+ 1800/100

= 35500/180000
2)4 2/5+2/8:0,8 = 22/5+ 2/8 : 8/10
= 176/40 + 10/40 : 3/10
= 186/40× 10/3
=558/ 400
3)12%+3/5:2/6= 12/100 + 3/5 :2/6
=12/100+ 60/100 : 2/6
= 72/100×6/2
=144/ 600
4)3 2/5×125 = 17/5 × 125
= 425
5)2 2/4 ×240 = 10/ 4 ×240
= 600

maaf ya kalo salah no 1, otaknya udah mentok