689*100/63,3=1088 общая численность. 689----63,3%. Х---------100%
1)140:7*5=100стр-прочитал.
<span>2)140-100=40стр-осталось.</span>
А)
1,7 = 1 7/10,
1,06 = 1 6/100 = 1 3/50,
1,85 = 1 85/100 = 1 17/20,
1,65 = 1 65/100 = 1 13/20,
1,08 = 1 8/100 = 1 2/25,
б)
1 17/20, 1 13/20, 1 7/10, 1 2/25, 1 3/50,
в)
1 17/20 + 1 13/20 + 1 7/10 + 1 2/25 + 1 3/50 =
= 5 + (85/100 + 65/100 + 70/100 + 8/100 + 6/100) =
= 5 + 234/100 = 5 + 2 34/100 = 7 34/100 = 7 17/50 (или 7,34)
√3*2√3+√3*√12=
2*3+√36=
6+6=12