Ответ:
6 ч 00 мин
180/360=1/2 окружности
3ч 00 мин
90/360=1/4 часть окружности
<span><span>8 2 (8 : 2 = 4)</span><span>4 2 (4 : 2 = 2)</span><span>2 2 (2 : 2 = 1)</span>1 </span>
8 = 2 · 2 · 2
<span><span>8 2 (8 : 2 = 4)</span><span>4 2 (4 : 2 = 2)</span><span>2 2 (2 : 2 = 1)</span>1 </span>
8 = 2 · 2 · 2
3 - простое число
1)7:8=х:98; (7*98)/8=8x; x=343/4; x=85,75
<span>2)у:1.5/31=7.3/4:1/3; y:36/31=31/4:1/3; (31y)/36=(31*3)/4; (31*4y)/124=(36*93)/124; y=27
</span><span>3)а/0,6=25/3; 5a/3=25/3; 5a=25; a=5
</span><span>4)2+t/5=4/9;t/5=-2+4/9;t/5=-14/9; 9t/45=-70/45; 9t=-70; y=-7целых 7/9</span>