Question

AJUDEM!!!!!

CALCULE:

-2+5-7+4-1=

4+9-8-7+3

-3-8+9+3-2=

-7+8-9+1-5=

-3-4-1+5+2-3

-3+4-5+1-7=

-8+5-9+6-1=



pfv

Answer 1

2+5-7+4-1= 7 - 7 + 4 - 1 = 0 + 4 - 1 = 4 - 1 = 3
4+9-8-7+3 = 13 - 8 - 7 + 3 = 5 - 7 + 3 = - 2 + 3 = 1
-3-8+9+3-2= -11 + 9 + 3 -2 = -2 + 3 - 2 = 1 - 2 = -1
-7+8-9+1-5= 1 - 9 + 1 -5 = -8 + 1 - 5 = - 7 - 5 = -12
-3-4-1+5+2-3 = - 7 - 1 + 5 + 2 - 3 = - 8 + 5 + 2 - 3 = - 3 + 2 - 3 = - 3 + 2 - 3 = - 1 - 3 = - 4
-3+4-5+1-7= 1 - 5 + 1 - 7 = - 4 + 1 - 7 = -3 - 7 = -10
-8+5-9+6-1= -3 - 9 + 6 - 1 = -12 + 6 - 1 = - 6 - 1 = -7