Question

1. (-1)+3(-4)-(-13)
2. (-15)+23(-8)+(-4)
3. [(-13-14)-(-9-12)]+(-6)
4. [(-19 + 20)+(14-15)]-[(-7-13)+12]
coronita a la primera respuesta :'D

Answer 1

1. (-1)+3(-4)-(-13) =

-1 +3 -4 +13

2-4+13

-2+13=+11

2. (-15)+23(-8)+(-4) =

-15+23-8-4

8-8-4 = -4

3. [(-13-14)-(-9-12)]+(-6) =

[(-27)-(-21)]-6

[-27+21]-6

-6-6=-12

4. [(-19 + 20)+(14-15)]-[(-7-13)+12] =

[1+(-1)] - [-20+12]

- [-20+12]

-[-8] = +8