9分之7除以5分之13+9分之2x13分之5

2025-01-19 13:04:17
推荐回答(1个)
回答1:

7/9 ÷ 13/5 + 2/9 × 5/13
= 7/9 × 5/13 + 2/9 × 5/13
= 5/13 × ( 7/9 + 2/9)
= 5/13 × 1
= 5/13