1⼀2减大括号3⼀4,减小括号1⼀4+5-1⼀2,小括号大括号等于多少?

2025-03-10 16:51:22
推荐回答(1个)
回答1:

1/2-[3/4-(1/4+5-1/2)]
=1/2-3/4+(1/4+5-1/2)
=1/2-3/4+1/4+5-1/2
=5+(1/2-1/2)-(3/4-1/4)
=5-1/2
=4.5