Question

Памогите пожалуйста решить 7 класс

Answer 1

Номер 6.
$( - 3mn {}^{2}) {}^{3} \times 2 m {}^{2} n {}^{3} = \\ = - 27m {}^{3} n {}^{6} \times 2m {}^{2} n {}^{3} = \\ = - 54m {}^{5} n {}^{9}$

Номер 7.
$24a {}^{2} b {}^{5} c {}^{3} \div ( - 0.8a {}^{2} b {}^{4} c) = \\ = 24a {}^{2} b {}^{5} c {}^{3} \times ( - \frac{10}{8} a {}^{2} b {}^{4} c) = \\ = - 30a {}^{4} b {}^{9} c {}^{4}$

Номер 8.
$- 0.2x {}^{6} y {}^{2} z - 0.5x {}^{6} y {}^{2} z - 0.3x {}^{6} y {}^{2} z = \\ = - 1x {}^{6} y {}^{2} z$

Номер 9.
$- 0.027a {}^{15} b {}^{6} c {}^{3} = ( - 0.3 a {}^{5} b {}^{2} c) {}^{3}$

Номер 10.
$7a {}^{4} b {}^{4} + 3ab {}^{3} \times ( - 9a {}^{3} b) = \\ = 7a {}^{4} b {}^{4} - 27a {}^{4} b {}^{4} = - 20a {}^{4} b {}^{4}$