1дециметр=10см
1метр=100см
80/100=8/10=4/5
X-10 y-5 z-8 мне так кажется
-y³ · (-y)⁵ = -y³ ·(-y⁵) = y⁸<span>;
b</span>⁶ · (-b)¹⁰ = b¹⁶<span>;
(x-2y)</span>⁴<span> </span>·<span> (y - 2x)</span>⁵ = <span> (y </span>- 2x)⁴<span> </span>· <span>(y </span>- 2x)⁵ = <span> (y </span>- <span>2x)</span>⁹
1)10х6:2+10х3:2=45
2)5х8:2+4х8:2+8х7=100