第一个回答我的必采纳，能做几道做几道，谢谢，谢谢，急急急

Question

如题所述

Answer 1

图 图

追答

本回答被提问者采纳

Answer 2

8/9+89/9+899/9+8999/9+4/9
=8/9+89/9+899/9+8999/9+1/9+1/9+1/9+1/9
=[(8+1)+(89+1)+(899+1)+(8999+1)]/9
=(9+90+900+9000)/9
=9999/9
=1111,
————
1/4+1/5+1/6+2/4+2/5+2/6+3/4+3/5+3/6+4/5
=(1/4+3/4)+(2/5+3/5)+(1/6+2/6+3/6)+(1/5+4/5)+2/4
=1+1+1+1+1/2
=4又1/2

Answer 3

80/9+1/9+89/9+1/9+899/9+1/9+8999/9+1/9
=81/9+90/9十900/9+9000/9
=9+10+100+1000
=1119追答

1/4+2/4+3/4+1/5+2/5+3/5+4/5+1/6+2/6+3/6=6/4+10/5+6/6
=3/2+2+1
二4.5

Answer 4

答案如图所示。