12X[480÷(一39)]筒便计算怎么算?

2025-06-28 13:58:28
推荐回答(1个)
回答1:

12X[480÷(-39)]=12X480÷(-39)=12X480÷(-3X12)=12X480÷(-3)÷12=480÷(-3)=-160