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-d2)- (-a + b) – (- c – d)=a-b+c+d3) (a + b) – (c + d)=a+b-c-d4) –(a + b) + (- c – d)=-a-b-c-d5) – (a – b) – (c + d)=-a+b-c-d6) (a – b) - (c – d)=a-b-c+d7)- (-a - b) + (- c – d)=a+b-c-d8) (a + b) + (- c + d)=a+b-c+d9) –(a - b) + (-c – d)=-a+b-c-d10) – (a + b) – (c + d)=-a-b-c-d

1) a – b + c – d2)a - b –  c + d3) a + b – c - d4) a - b - c – d5) a + b – c - d6) a – b - c + d7)a + b  - c – d8) a + b - c + d9) a + b -c – d10) a - b –c - d