化簡下列各題,help~40分!

1.
= 5(p-q)^2 / 2(p-q)
= 5(p-q) / 2

2.
= 2(s+t)^2 / 6(s+t)
= (s+t) / 3

3.
= s(t-u) / 4(t-u)
= s / 4

4.
= 5 (y+2z) / 2 (y+2z)
= 5/2

5.
=5 (x+y) / 10 (x+y)
= 1/2

1) 2.5(p-q)
2)(s+t)/3 ( / = to divide or over )
3)s/4
4)2.5
5)0.5

1) 5(p-q)
---------
2
2)2(s+t)
-------------
6
=s+t
-------------
3

3)s/4

4)5(u+2z)
-----------------
2(y+2z)
=5/2

5) 5/10=1/5

2007-09-23 22:03:16 補充：
5)化簡後=1/2