Пошаговое объяснение:

№23

5,7/(2,3+17,7) = 5,7/20 = 0,285

№24

4,7/(1,3-5,3) = 4,7/-4 = -1,175

№25

1) 1,072 + 3,228 = 4,3

2) 4,3 : 43/5 = 43/10 * 5/43 = 5/10 = 1/2

Verified answer

23. 1) 2.3+17.7=20;

2)5.7/20 = 0.285

24. 1)1.3-5.3=-4

2)4.7/(-4)=-1.175

25.1) 1.072+3.228 =4.3

2) 4.3/(43/5) = 5/10=0.5