算..!急急急

2/3-1/8-(-1/3)+(-3/8)
=2/3+1/3-1/8-3/8
=1-1/2
1/2

4-6除(-2)乘(-1/3)
=4-[6/(-2)*(-1/3)]
=4-1
=3

-1立方-(1-0.5)乘1/3乘[2-(-3)的平方]
=-1-1/2*1/3*(2-9)
=-1+7/6
=1/6

|-2又1/2|-(-2.5)+1-|1-2又1/2|
=5/2+2.5+1-3/2
=1+2.5+1=4.5

1. 2/3-1/8-(-1/3)+(-3/8)
=16/24-3/24+8/24-9/24
=1/2

2. 4-6除以(-2)乘(-1/3)
=4-1
=3
3. -1立方-(1-0.5)乘1/3乘[2-(-3)的平方]
=-1+7/6
1/6
4. |-2又1/2|-(-2.5)+1-|1-2又1/2|
=5/2+5/2+1-3/2
=4又1/2