Question

1) (25*2400+66000):70-(52*550-107*140):20=
2) 51200:800+294*400+(807032-460733):267=
3) (548037+416619):297+(62578-48967)*28=
4) 432765-( 9982705-213521):208+2450*340=

Answer 1

1) = (60000+66000):70-(28600-14980):20 = 1800-681=1119
2) = 64+117600+1297=118961
3) = 3248+381108=384356
4) = 432765-46967.23+83300=1218797.77