(15*(178+5)+90)*7=15*273*7=28665
<span>486/9*(46+54)/10= 54*100/10=540
624268-13965+190008=800311
105*(6+203)-300/5= 21945-60=21885
(6275-1829)*0+3500=3500
0/(17068+91374)+10000=10000
</span>
3^6 = 729 , 8^6 = 262144 , 12^6 =2985984 , (3^6*8^6)/12^6 = 64
1) S=5•7=35м
2)S=2•9=18мм=1,8см
3)S=3•8=24дм
7,8х - 4,6х + 0,8 = 12
3,2x + 0,8 = 12
3,2x = 12 - 0,8
3,2x = 11,2
x = 11,2 ÷ 3,2
x = 3,5