Question

数学题，急急急！！！！！！！！！！！！！急急急急急急！！！！！！！在线等待！！！我会加悬赏的。

1／5÷9＋1／5÷9／8（简便运算）

Answer 1

原式=1/5*(1/9+8/9)=1/5*1=1/5

Answer 2

1 / 5 ÷ 9 + 1 / 5 ÷ 9 / 8
= 1 / 5 ÷ 9 + 1 / 5 × 8 / 9
= 1 / 5 ÷ 9 + 1 / 5 ÷ 9 × 8
= 1 / 5 ÷ 9 × （8 + 1）
= 1 / 5 ÷ 9 × 9
= 1 / 5

Answer 3

解：
(1/5)÷9＋(1/5)÷9/8
=(1/5)×(1/9)＋(1/5)×(8/9)
=(1/5)×(1/9＋8/9)
=(1/5)×1
=1/5

Answer 4

1／5÷9＋1／5÷9／8
=1/5X1/9+1/5X8/9
=1/5X（1/9+8/9）
=1/5X1
=1/5

Answer 5

=1/5X1/9+1/5X8/9
=1/5X（1/9+8/9）
=1/5X1
=1/5

Answer 6

1/5*(1/9+8/9)=1/5*1=1/5