1 - 0,85 2- 3,45 3- 4, 67 4 - 2, 67 5-1,76 6- 2,87 7-1,65
1) 64¹/² = (8²)¹/² = 8¹ = 8
2) 121¹/² = (11²)¹/² = 11¹ = 11
3) (243 · 32)¹/⁵ = (3⁵ * 2⁵)¹/⁵ = (3⁵)¹/⁵ * (2⁵)¹/⁵ = 3 * 2 = 6<span>
4) 9</span>⁸<span> </span>·<span> 25</span>⁷ : 225⁶ = 9*9⁷ · 25⁷ : 225⁶ = 9 · (9·25)⁷ : (225)⁶ =
= 9·(225)⁷ : (225)⁶ = 9 · 225⁷⁻⁶ = 9 · 225 = 2025<span>
5) -150 </span>·<span> 128</span>¹/⁷ + 35 = -150 · (2⁷) ¹/⁷ + 35 = - 150 * 2 + 35 =
= - 300 + 35 = - 265
<span>
6) (1/25)</span>⁻⁶ · 3125³/⁵<span> </span>·<span> 5</span>⁻³<span> + 25</span>⁵/² · (1/5)³ =
= 25⁶ · (5⁵)³/⁵ · (1/5)³ + (5²)⁵/² · (1/5)³ =
= (5²)⁶ · 5³ · (1/5)³ + 5⁵ · (1/5)³ =
= 5¹²⁺³ · (1/5)³ + 5⁵ · (1/5)³ =
= 5¹⁵ · (1/5)³ + 5⁵ · (1/5)³ =
= 5¹⁵⁻³ + 5⁵⁻³ =
= 5¹² + 5²<span>
7)(25</span>⁴)¹/⁸ = (25)⁴/⁸ = 25¹/² = (5²)¹/² =5
500 это 100%
80 это х%
х=80*100 /500 =80/5 =16
8⅛-5⅞=+(8⅛-5⅞)=2²/8= 2¼ или две целых одна четвёртая
Ответ во вложении...............