Question

a) (-4) - (-7) + (+3) + (-1) =
b) 2+(-15) + (+7) - (-8) - (+10) =
c)-11 - (-7 + 2) - (-3 + 10) + (-6 - 4) =
​

Answer 1

a -4-7+3-1=-9

b +2-15+7-8-10=-24

c -11-5-7-10=-33

Answer 2

a)(-4)-(-7)+(+3)+(-1)
-4+7+3-1
-5+10
+5

b)2+(-15)+(+7)-(-8)-(+10)
2-15+7+8-10
+17-25
-8

c)-11-(-7+2)-(-3+10)+(-6-4)
-11-(-5)-(+7)+(-10)
-11+5-7-10
-28+5
-23

+(+)= +
+(-)= -
-(-)= +
-(+)= -
espero que ajude ;)