1). 380 + 40 = 420
420 : 7 = 60
60 * 9 = 540
540 - 300 = 240
а = 240
2). 8 * 70 = 560
560 - 200 = 360
360 : 4 = 90
90 * 3 = 270
b = 270
3). 25 * 4 = 100
100 : 20 = 5
5 * 80 = 400
400 - 225 = 175
c = 175
4). 186 : 3 = 62
62 + 298 = 360
360 : 4 = 90
90 : 3 = 30
d = 30
