分式的加减计算题
x3yx2y2x3yx11abc222222xyxyyxxxabcabccab(1) (2) (3)
x22b22a116ab22ab (4)x1-x-1 (5)a39a (6)a42a (7)
2xyxya23a111212222xyyx xya1a11x1x1x(8) (9) (10)
3131124224(11)2x662x9x (12)1x1x1x1x
x1abbcca412(13)ab+bc+ac(14)(2-x3)·x1 (15)(1-1a)(a-1)
4xy4xyx2x2x1x22x22(16)x1-x1÷x2x1 (17)(x-y+xy)(x+y-xy) ·
a63x2x1x1x1a22222(18)a3-a3a+a(19)x2x-x4x4 (20)(xx-x2x1)÷x
a241a1x2yxy11(2)()•()a2 (22)xyxyx2yxy (21)a4a4a22x2yxy11a2aab2a2b()()2•2xyxyx2yxyab3a3bb ab(23) (24)
1x2x14a4a112(a1)(1a)1xx2x1 a1a1 (26) (25)
2
b2ab11a221122(27)x1x1x2x2 (28)abbaabab
(29)
a24118121a44a2aa2b221122222(30)[a2abb+ab÷(a+b)2]·ab2ab