Question

please solve this jiya sis just last 2 pls solve these ​

Answer 1

Answer:

12).

1-2+3-4+5-6+7-8+9-10

-1+(-1)+(-1)+(-1)+(-1)

-5........

15).

30+(-25)+(-10)

30-25-10

30-35

-5.

(-20)+(-5)

-20-5

-25.

..