题目内容
4x2y-9xy2+7-4x2y+10xy2-4
xy2+3
计算(每小题4分,共16分)
(1)
(2)-22×5-(-3)×-5÷(-)
(3)4x2y-9xy2+7-4x2y+10xy2-4
(4)3(2x2-xy)-4(x2-xy+3)
计算(每小题4分,共16分)(1) (2)-22×5-(-3)×-5÷(-)(3)4x2y-9xy2+7-4x2y+10xy2-4 (4)3(2x2-xy)-4(x2-xy+3)