1) (0.34-2.59) * 7.8 + 2.9 * (-4.31 - 0.79)

2) (79.21 - 100.36) * 0.2 - (7.29 - 28.76): 38

1) (0,34-2,59)·7,8+2,9·(-4,31-0,79)=-32,34

1) 0,34-2,59=-2,25

2) -4,31-0,79=-5,1

3) -2,25·7,8=-17,55

4) 2,9·(-5,1)=-14,79

5) -17,55+(-14,79)=-17,55-14,79=-32,34

2) (79,21-100,36)·0,2-(7,29-28,76):38=-3,665

1) 79,21-100,36=-21,15

2) 7,29-28,76=-21,47

3) -21,15·0,2=-4,23

4) -21,47:38=-0,565

5) -4,23-0,565=-3,665