Question

1) -7-(-5)=
2) -7-5=
3) 2-(-9)
4) 5-(-10)

Answer 1

SE usa ley de signo:
- x - = +
+ x + =+
- x + = -
+ x - = -

1) -7-(-5)=-7 + 5= -2
2) -7-5= -12
3) 2-(-9)= 2+9 = 11
4) 5-(-10)= 5 + 10 = 15

Answer 2

7 mas 5 igual  12
menos 7 menos 5 igual menos 12
menos 11
menos 15