" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
1.
(1-2) + (3-4) + .... + (9-10)
1-1+ ... + -1
-1 x 5 = -5
2.
(-100+50) + (-99+49) +.... + (-50+0) + (-49-1) + .... + (-26-24) + -25
-50 + -50 +....+ -50
(-50 x 74) + (-25)
-370 + -25 = -395