Question

Помогите пж 353 номер

Answer 1

1.
$3 {m}^{2} n times 0.4m {n}^{3} = 1.2 {m}^{3} {n}^{4}$
2.
$7 frac{1}{3} {b}^{3} {c}^{2} times frac{9}{11} {a}^{4} {b}^{5} = 6 {a}^{4} {b}^{8} {c}^{2}$
3.
$- 5 {x}^{4} {y}^{2} {z}^{8} times ( - 0.8 {x}^{6} {y}^{8} {z}^{2} ) = 4 {x}^{10} {y}^{10} {z}^{10}$
4.
$- 5 frac{3}{7} abc times 3.5 {a}^{12} {b}^{10} c = - 19 {a}^{13} {b}^{11} {c}^{2}$