а)
1. 860×3=2580
2. 200640-2580=198060
3. 198060+36574=234634
б)
1. (25088-4768)= 20320
2. 20320:4=5080
3. 6080×8=760
4. 5080+760=5840
1) 22 : 2 = 11
2) (33 - 3) + (3 : 3) = 31
33 - 3 = 30
3 : 3 = 1
30 + 1 = 31
3) (0 + 1 + 2 + 3 + 4 - 56 : (7 * 8)) : 9 = 1
7 * 8 = 56
56 : 56 = 1
0 + 1 + 2 + 3 + 4 - 1 = 9
9 : 9 = 1