1) 2,71* 12,6+87,4*2,71=271
2,71*12,6=34,146
87,4*2,71=236,854
236,854+34,146=271
2)20,8*17,9-20,8*7,9=208
20,8*17,9=372,32
20,8*7,9=164,32
372,32-164,32=208
3)3,08*17,9-3,08*7,9=30,8
3,08*17,9=55,132
3,08*7,9=24,332
55,132-24,332=30,8
4)7.5-6.7+2.5*(9,4-2.7)=17,55
7.5-6.7=0,8
2.5*9.4=23,5
2.5*2.7=6,75
0,8+23,5=24,3
24,3-6,75+17,55
1) 2,71* 12,6+87,4*2,71=271
2,71*12,6=34,146
87,4*2,71=236,854
236,854+34,146=271
2)20,8*17,9-20,8*7,9=208
20,8*17,9=372,32
20,8*7,9=164,32
372,32-164,32=208
3)3,08*17,9-3,08*7,9=30,8
3,08*17,9=55,132
3,08*7,9=24,332
55,132-24,332=30,8
4)7.5-6.7+2.5*(9,4-2.7)=17,55
7.5-6.7=0,8
2.5*9.4=23,5
2.5*2.7=6,75
0,8+23,5=24,3
24,3-6,75+17,55