<span>-0,6х - 1.2х +3.2х - 5.6х=</span><span>-4,2х</span>
<span>если х=3,5
-4,2*3,5=-14,7
</span>
A)5/8
Б)-3/8
В)-1 целая 3/8
Г)-4 целая 3/8
/ это дробь
(70+28)/7= 98/7=14 = 70/7 + 28/7 = 10 + 4 = 14
(17+13)/5=30/5=6
(54+18)/6=72/6=12 = 54/6 + 18/6 = 9 + 3 = 12
(45+18)/3=63/3=21
(40+16)/8=56/8=7 = 40/8 + 16/8 = 5 + 2 = 7
(49+32)/9=81/9=9
(21+15)/4=36/4=9
<span>(56+35)/7=91/7=13 = 56/7 + 35/7 = 8 + 5 = 13</span>
1) 3/15 - 2 7/25 = 30/150 -2 42/150 = -2 12/150 = -2 2/25
2)-2 2/25 : 1 2/25 = -52/25 : 27 /25 = - 52/27 = -1 25/27
3)-1 25/27 +1 4/13 = -1 325/351 + 1 108/351 = - 217/351
А 1/2;2/9;2/7;3/5;4/11;7/8;1/5;1/3;7/16;3/10;2/3;
5/7;5/9;2/5 последнюю не видно
Б 1 1/7;1/12;1 13/15;1 1/8;5/11;1 1/4;5/6;1 5/8;1 1/10;
1/6;1 6/13;1 3/4;4/7;1 9/14 последнюю не видно
В 4 3/8;3 6/7;4 7/9;4 5/13;1 1/6;4 6/11;4 11/14;
3 5/12;4 11/20;4 4/15;2 4/7;4 4/21;4 1/9;2/11 последнюю не видно