Question

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Answer 1

Ответ:

1)

$a - 2b$

2)

$3x - 2y$

3)

$- 2n$

4)

$- 9b$

5)

$32k + 7n$

6)

$0.5m - 2z$

7)

$6.9n - 6.9m$

8)

$\frac{1}{100} \times ( - 81a + 91b)$

Answer 2

Объяснение:

1)

$- a + b + 2a - 3b = a - 2b$

2)

$4x - 3y - x + y = 3x - 2y$

3)

$3m - 4n + 2n - 3m = - 2n$

4)

$7a - 10b + b - 7a = - 9b$

5)

$25k - 12n + 7k + 7n + 12n = 32k + 7n$

6)

$0.5m + 2z + 5m - 4z - 5m = 0.5m - 2z$

7)

$7n - 7m + 0.1m - 0.1n = 6.9n - 6.9m$

8)

$0.09a + 0.01b - 0.9a + 0.9b = - 0.81a + 0.91b$