1. Раскройте скобки:
1) (a – b) + (c – d)
2)- (-a + b) – (- c – d)
3) (a + b) – (c + d)
4) –(a + b) + (- c – d)
5) –(a – b) – (c + d)
6) (a – b) - (c – d)
7)- (-a - b) + (- c – d)
8) (a + b) + (- c + d)
9) –(a - b) + (-c – d)
10) – (a + b) – (c + d)

1) (a – b) + (c – d) = a-b+c-d.

2)- (-a + b) – (- c – d) = a-b+c+d.

3) (a + b) – (c + d) = a+b-c-d.

4) –(a + b) + (- c – d) = -a-b-c-d.

5) –(a – b) – (c + d) = -a+b-c-d.

6) (a – b) - (c – d) = a-b-c+d.

7)- (-a - b) + (- c – d) = a+b-c-d.

8) (a + b) + (- c + d) = a+b-c+d.

9) –(a - b) + (-c – d) = -a+b-c-d.

10) – (a + b) – (c + d) = -a-b-c-d.

1)a-b+c-d

2)a-b+c+d

3)a+b-c-d

4)-a-b-c-d

5)-a+b-c-d

6)a-b-c+d

7)a+b-c-d

8)a+b-c+d

9)-a+b-c-d

10)-a-b-c-d