问题
解答题
计算:24-23+22-21+…+4-3+2-1=______.
答案
24-23+22-21+…+4-3+2-1
=(24-23)+(22-21)+…+(4-3)+(2-1)
=1+1+…+1+1
=12
故答案为:12.
计算:24-23+22-21+…+4-3+2-1=______.
24-23+22-21+…+4-3+2-1
=(24-23)+(22-21)+…+(4-3)+(2-1)
=1+1+…+1+1
=12
故答案为:12.