﹙2/71-1/69﹚×23+25÷71+151/3÷23.
问题描述:
﹙
-2 71
﹚×23+25÷71+151 69
÷23. 1 3
答
﹙
-2 71
﹚×23+25÷71+151 69
÷23,1 3
=
×23-2 71
×23+1 69
+1525 71
×1 3
,1 23
=(
+46 71
)+(25 71
−46 69
),23 69
=1+
,1 3
=1
.1 3