问题
填空题
计算:100-99+98-97+96-95+…+4-3+2-1=______.
答案
100-99+98-97+96-95+…+4-3+2-1,
=(100-99)+(98-97)+(96-95)+…+(4-3)+(2-1),
=1+1+1+…+1+1,
=1×50,
=50.
故答案为:50.
计算:100-99+98-97+96-95+…+4-3+2-1=______.
100-99+98-97+96-95+…+4-3+2-1,
=(100-99)+(98-97)+(96-95)+…+(4-3)+(2-1),
=1+1+1+…+1+1,
=1×50,
=50.
故答案为:50.