Question

Помогите пожалуйста

Answer 1

Ответ:

1.

1)

$3mn$

2)

$2{m}^{2} {n}^{2}$

3)

$\frac{1}{2} {m}^{3} {n}^{2}$

4)

$\frac{1}{3} {m}^{2} {n}^{3}$

2.

1)

$6mn$

2)

$12xy$

3)

$6m {n}^{2}$

4)

$10x {y}^{2}$

3.

1)

$6 \times \frac{2}{3} \times 5.1 = 20.4$

2)

$12 \times \frac{3}{4} \times 2.3 = 20.7$

3)

$6 \times 1.2 \times {( \frac{1}{9} )}^{2} = \frac{4}{45}$

4)

$10 \times 3.2 \times {( \frac{1}{5} )}^{2} = 1.28$

4.

1)

$3x {y}^{2}$

2)

$- 5 {m}^{2} n$

3)

$- 2 {a}^{3}$

4)

$12 {b}^{4}$