括号1⼀2-5⼀9+7⼀12括号回来成-36

括号1/2-5/9+7/12括号回来成-36
2024-11-28 20:28:07
推荐回答(2个)
回答1:


回答2:

(1/2-5/9+7/12)×(-36)
=1/2×(-36)-5/9×(-36)+7/12×(-36)
=-18+20-21
=-19