1) 427 051 :839-390 912 : 768 +252 000:1260 + 249 249 :249= 1201
1. 427051: 839 =509
2. 390912 : 768=509
3. 252000:1260=200
4. 249249:249=1001
5. 509-509=0
6. 0+200=200
7. 200+1001=1201
2)((4,3-1,08):0,1+(40-8,4)*0,1)*100=3536
1. 4,3-1,08 = 3,22
2. 40-8,4 = 31,6
3. 3,22:0,1=32,2
4. 31,6*0,1=3,16
5. 32,2+3,16=35,36
6. 35,36*100=3536
