70%x-—30%x=1.2x3640%x=43.2x=10.835÷（5/6－2/3）x3=35÷(5/6-4/6)x3=35÷1/6x3=35x6x3=630（8/10+3/5）×（2/9-2/15）=（8/10+6/10）×（10/45-6/45）=14/10x4/45=28/22596.2×37-22.2÷37=3559.4—0.6=3558.810...剩下的呢96.2×37-22.2÷37=3559.4—0.6=3558.810944÷34×25-758=321.88235×25-758=8047.0588-758=7289.0588132.5-18÷1.5+7.6=132.5-12+7.6=120.5+7.6=128.1