Question

这几题怎么做！！！！急急急急急急急急急！！！！！！

Answer 1

(1)原式=(-2/3) - (1/3) + 1又1/4
=-(2/3 + 1/3) + (1 + 1/4)
=-1 + 1 + 1/4=1/4
(2)-1的几次方？看不清，我猜一下是4次方
原式=-1 + (-3/2 - 3/8 + 7/12)×(-24)=-1 + (-3/2)×(-24) - (3/8)×(-24) + (7/12)×(-24)
=-1 + 36 + 9 - 14=30
(3)原式=9 - (-1)×(1/3 - 1/2)×6
=9 - (-1)×[(1/3)×6 - (1/2)×6]
=9 - (-1)×(2 - 3)
=9 - (-1)×(-1)=9-1=8
(4)原式=(-7/9 - 5/18 + 1/6)×(-36)
=(-7/9)×(-36) - (5/18)×(-36) + (1/6)×(-36)
=28 + 10 - 6=32
(5)原式=-6²×6×(-1/6)² - 49
=-[6×(-1/6)]²×6 - 49
=-(-1)²×6 - 49
=-1×6 - 49=-55
(6)原式=(-1/3)×12 + (1/4)×12 + 1
=-4 + 3 + 1=0