1-57=19+89=13+58+23=56-16=1315-25=15-16=14+13=1-110-710=3-2.8=2.21+1.79=25×8=420÷7÷6=

Question

1-(5)/(7)=	(1)/(9)+(8)/(9)=	(1)/(3)+(5)/(8)+(2)/(3)=	(5)/(6)-(1)/(6)=
(13)/(15)-(2)/(5)=	(1)/(5)-(1)/(6)=	(1)/(4)+(1)/(3)=	1-(1)/(10)-(7)/(10)=
3-2.8=	2.21+1.79=	25×8=	420÷7÷6=

Answer 1

1-(5)/(7)=(2)/(7)	(1)/(9)+(8)/(9)=1	(1)/(3)+(5)/(8)+(2)/(3)=1(5)/(8)	(5)/(6)-(1)/(6)=(2)/(3)
(13)/(15)-(2)/(5)=(7)/(15)	(1)/(5)-(1)/(6)=(1)/(30)	(1)/(4)+(1)/(3)=(7)/(12)	1-(1)/(10)-(7)/(10)=(1)/(5)
3-2.8=0.2	2.21+1.79=4	25×8=200	420÷7÷6=10

故答案为：(2)/(7)，1，1(5)/(8)，(2)/(3)，(7)/(15)，(1)/(30)，(7)/(12)，(1)/(5)，0.2，4，200，10