Question

求下数学题答案！！！急急急

1+0.99－0.98—0.97+0.96+0.95—0.94—0.93+·············+0.04+0.03—0.02—0.01
=？？？？

要过程，过程！！！！给过程的加20悬赏分！！！！！

Answer 1

原式=（1-0.98）+（0.99-0.97）+。。。。+（0.04-0.02）+（0.03-0.01）
=0.02x50
=1

Answer 2

方法1
1+0.99－0.98—0.97+0.96+0.95—0.94—0.93+··········+0.04+0.03—0.02—0.01
= (1+0.99-0.98-0.97) + (0.96+0.95-0.94-0.93) + ·········+ (0.04+0.03-0.02-0.01)
= (0.02) + (0.02) + ·········+ (0.02)
= (0.02) * 25
= 1

方法2
1+0.99－0.98—0.97+0.96+0.95—0.94—0.93+··········+0.04+0.03—0.02—0.01
= 1 + (0.99-0.98-0.97+0.96) + (0.95-0.94-0.93+0.92) + ·········+ (0.03-0.02-0.01)
= 1 + 0 + 0 + ·········+ 0
= 1