25乘以(5⼀4–7⼀1)乘以14脱式计算

2025-05-22 14:28:15
推荐回答(1个)
回答1:

25X(4/5–1/7)X14
=25X4/5X14-25X1/7X14
=5X4X14-25X2
=280-50
=230