carinaburcea36 carinaburcea36
  • 04-04-2020
  • Mathematics
contestada

Efectuati!
(-1)+2+(-3)+4+(-5)+...+(-19)+20
Ajutati-ma, va rog!

Respuesta :

dannielle
dannielle dannielle
  • 04-04-2020

Answer:10

Step-by-step explanation:

2+4+6+.....+20- (1+3+5+7+...+19)=(2-1)+(4-3)+(6-5)+....+(20-19)=1+1+...+1 ( de 10  ori= 10 times)

=10

Answer Link

Otras preguntas

how were north american colonies all similar in the 1700s?
How do you?...Multiply out and simplify 10(2x-1)-20x?
What is the amplitude of y=1/2 sin2x
what is a high structure part of a church which has 5 letters
what is a high structure part of a church which has 5 letters
how were north american colonies all similar in the 1700s?
What is the amplitude of y=1/2 sin2x
what is a high structure part of a church which has 5 letters
what's another word for over thinking?
What are the functions of receptors in our body? Think of a situation where receptors do not work properly. What problems are likely to arise?