(270.000+80.000):1000:7=50
270.000+80.000=350.000
350.000:1000=350
350:7=50
(540.000-60.000):1000:6=80
540.000-60.000=480.000
480000:1000=480
480:6=80
85:5•1000+349000=366000
85:5=17
17•1000=17000
17000+349000=366000
90•60•100-109.000=539.891
90•60=5.400
5.400•100=540.000
540.000-109=539.891