50-8=............
50-8===============================42
75×35=2625
2625×1/5=525кг ак ун
2625-525=2100кг қара ун
1) 2 13/30-(1 1/10 +1/5×2)=2 13/30-(1 1/10+ 2/10)=2 13/30- 9/10×3=1 16/30
2,8/5,6 = x/4 3 3/7 : x = 5 5/7 : 5
1/2 = x/4 24/7 : x = 40/7 : 5
x = 1/2 * 4 24/7 : x = 8/7
x = 2 x = 24/7 *7/8
x = 3
Ответ: {2} Ответ:{3}