3)
36 2/3÷15=110/3×1/15=22/9
8 2/3×7=26/3×7=182/3
22/9+182/3=22/9+546/9=568/9
8 6/7÷2 4/7=62/7÷18/7=
=62/7×7/18=31/9=3 4/9
12 1/3+3 4/9=12 3/9+3 4/9=15 7/9
568/9÷15 7/9=568/9÷142/9=
=568/9×9/142=4
2 3/8÷3/4=19/8×4/3=19/6
24×7/9=56/3
19/6+56/3=19/6+112/6=131/6
157 4/5÷24=789/5×1/24=263/40=
=6 23/40
7 2/3-6 23/40=7 80/120-6 69/120=
=1 11/120
131/6÷1 11/120=131/6÷131/120=
=131/6×120/131=20
4+20=24
A = 25 м
b = 26 м
c = 4 м
V = ?
V = abc = 25 * 26 * 4 = 2600 м³
67*32*46=<span> 67*(32*46)</span>
138*(28*52)=(138*28)*52
<span>94*(17*23) =</span><span>17*94*23 </span>
<span>
</span>
<span>2) <span>452*43*12 = 43*12*452</span></span>
<span><span><span>138*(28+52)= 138*28+138*52</span></span></span>
<span><span><span><span>374*(37*53)=(374*37)*53</span></span></span></span>
<span><span><span><span><span>113*86*24= 86*113*24</span></span></span></span></span>
<span><span><span><span><span><span>264*127*8= 8*264*127</span></span></span></span></span></span>
<span><span><span><span><span><span><span>187*106*(93-56)= 187* (106*93-106*56)</span></span></span></span></span></span></span>
Смотри чтобы найти S, есть формула S=U*t вот и делаем вывод что надо
80м/мин*8минут=640метров
А)9цел7/15+2цел1/5=9цел7/15+2цел3/15=9цел2/3