(115+85)*9 = 200 * 9 = 1800
(500+45):5 = 500 : 5 + 45 : 5 = 100 + 9 = 109
(640+60)*7 = 700 * 7 = 4900
(184+116):3 = 300 : 3 = 100
(670+30)*6 = 700 * 6 = 4200
(720+80):8 = 800 : 8 = 100
(500+45) : 5 = 545:5 = 109
(640+60) *7 = 700*7=4900
(184+116) :3= 300:3 =100
(670+30) *6 =700*60=4200
(720+80) : 8= 800:8=100
(115+85)*9 = 200 * 9 = 1800
(500+45):5 = 500 : 5 + 45 : 5 = 100 + 9 = 109
(640+60)*7 = 700 * 7 = 4900
(184+116):3 = 300 : 3 = 100
(670+30)*6 = 700 * 6 = 4200
(720+80):8 = 800 : 8 = 100