(860+40)-(560-60 ):100 = 4
1) 860+40 = 900
2) 560-60 = 500
3) 500:100 = 5
4) 900-5 = 895
(920-50)+(480+24):6 = 954
1) 920-50 = 870
2) 480+24 = 504
3) 504:6 = 84
4) 870+84 = 954
2400-(270+30)* (400-396) = 1200
1) 270+30 = 300
2) 400-396 = 4
3) 300*4 = 1200
4) 2400-1200 = 1200
510*6 = 3060
(78-20)+(230+470) = 758
1) 78-20 = 58
2) 230+470 = 700
3) 700+58 = 758