Question

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)

Answer 1

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

Answer 2

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