12*3х
1) 12*3=36
2) 36*х= 36х
ответ: 36 х
S=пи R^2
R=8/2=4
S=3,14
16=50.24 кв,см
<u>1% - это сотая часть</u>
2% = 2/100 = 1/50
5% = 5/100 = 1/20
20% = 20/100 = 1/5
60% = 60/100 = 3/5
80% = 80/100 = 4/5
140% = 140/100 = 7/5
180% = 180/100 = 9/5
1) 2 1/2=5/2
2) 6 1/6=37/6
3) 3 4/9=31/9
4) 7 3/11=80/11
5) 5 5/12=65/12