1+0.98-0.96-0.94+0.92+0.90-0.88-0.86+……+0.08+0.06-0.04-0.02=
问题描述:
1+0.98-0.96-0.94+0.92+0.90-0.88-0.86+……+0.08+0.06-0.04-0.02=
答
1+0.98-0.96-0.94+0.92+0.90-0.88-0.86+……+0.08+0.06-0.04-0.02
=1+(0.98-0.96-0.94+0.92)+(0.90-0.88-0.86+0.84)……+0.08)+(0.06-0.04-0.02)
=1+0+0……+0
=1