Question

100-99+98-97+...+4-3+2-1​

Answer 1

The answer is 4

Step-by-step explanation:

=1+98−97+4−3+2−1

=99−97+4−3+2−1

=2+4−3+2−1

=6−3+2−1

=3+2−1

=5−1

=4