1又1⼀2 * 5⼀7 -(-5⼀7)* 2又1⼀2 +(-5⼀2)* 1⼀7 丨(-2)^3 - 2^3丨 - 丨(-3)^3 - (-3^3) 丨-丨-5^2

2025-01-07 10:08:28
推荐回答(1个)
回答1:

【1】5/7 + (2又2/5) -5/7 * 5/12 -5/3 /4
=5/7+12/5-5/7*5/12-5/12
=5/7(1-5/12)
=5/7*7/12
=5/12
【2】1又2/13 - (5/8 - 1/6 + 7/12 )* 24
=15/13-(15/24-4/24+14/24)×24
=15/13-25/24×24
=15/13-25
=15/13-325/13
=-310/13

【3】-6^2 -(3-7)^2 -2*(-1)^3 -丨-2丨
=-36-16+2-2
=-52