*11. Find the value of the expression (-1)+2+(-3) + 4 + ... + (-99) + 100. Solution

Mathematics

2 answers:

scZoUnD [109]3 years ago

8 0

Answer:

50.

Step-by-step explanation:

Each pair of numbers add up to 1:

-1 + 2 = 1, -3 + 4 = 1 and so on

There are 50 of theses pairs so the value is 50.

zhannawk [14.2K]3 years ago

4 0

Answer:

50

Step-by-step explanation:

(-1) + 2 + (-3) + 4 + ... + (-99) + 100 =

= 2 - 1 + 4 - 3 + .. + 100 - 99

= 1 + 1 + .. + 1

= 50×1

= 50

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