Х:200=18:9
Х:200=2
Х=200х2
Х=400
Ответ:400
200х4:у=100
800:у=100
у=800:100
у=8
Ответ:8
z*300=900:3
z*300=300
z=300:300
z=1
Ответ:1
Sina=√1-16/25=√9/25=3/5
tga=3/5:(-4/5)=-3/4
2м.60см.=260см.
260:26=10см
1. 11,25 - 3 5/12 =
11 1/4 - 3 5/12 =
11 3/12 - 3 5/12 =
10 15/12 - 3 5/12 =
7 10/12 = 7 5/6
2. 7 5/6 + 4.3 =
7 5/6 + 4 3/10 =
7 25/30 + 4 9/30 =
11 34/30
3. 11 34/30 - 7 19/30 =
4 15/30 = 4 1/2 = 9/2
4. 7 7/12 - 5 5/6 =
7 7/12 - 5 10/12 =
6 19/12 - 5 10/12 =
1 9/12 = 1 3/4 = 7/4
5. 9/2 : 7/4 = 9/2 * 4/7 =
9*2/7 = 18/7 = 2 4/7
-к= -4.5
-к= 10
-к= -8
-к= -2.3