Question

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=

Answer 1

-2+5-7+4-1
3 - 7 + 3 
-4 + 3 = -1
====

4+9-8-7+3
13 - 15 + 3
-2 + 3 = 1
====

-3-8+9+3-2
-11 + 9 +1
-2 + 1 = -1
===

-7+8-9+1-5
1 - 9 - 4
-8 - 4 = - 12
====

-3-4-1+5+2-3
-8 + 5 -1
-3 - 1 = -4
======

-3+4-5+1-7
1 - 5 -6 
-4 - 6 = - 10
=====

-8+5-9+6-1
-3 - 9  + 5
-12 + 5 = -7