一.先化简,再求值.(-x2+5+4x)+(5x-4+2x2) 二.计算 (1) x2y-3x2y (2)10y2+0.5y2 (3)-1/2a2bc+1/2cba2 (4)1/4mn-1/3mn+7 (5)7ab-3a2b2+7+8ab2+3a2b2-3-7ab (6)3x3-3x2-y2+5y+x2-5y+y2 三.计算{难点} (1) (4a3b-10b3)+(-3a2b2+10b3) (2) (4x2y-5xy2)-(3x2y-
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![一.先化简,再求值.(-x2+5+4x)+(5x-4+2x2) 二.计算 (1) x2y-3x2y (2)10y2+0.5y2 (3)-1/2a2bc+1/2cba2 (4)1/4mn-1/3mn+7 (5)7ab-3a2b2+7+8ab2+3a2b2-3-7ab (6)3x3-3x2-y2+5y+x2-5y+y2 三.计算{难点} (1) (4a3b-10b3)+(-3a2b2+10b3) (2) (4x2y-5xy2)-(3x2y-](/uploads/image/z/15194213-53-3.jpg?t=%E4%B8%80.%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC.%28-x2%2B5%2B4x%29%2B%285x-4%2B2x2%29+%E4%BA%8C.%E8%AE%A1%E7%AE%97+%281%29+x2y-3x2y+%282%2910y2%2B0.5y2+%283%29-1%2F2a2bc%2B1%2F2cba2+%284%291%2F4mn-1%2F3mn%2B7+%285%297ab-3a2b2%2B7%2B8ab2%2B3a2b2-3-7ab+%286%293x3-3x2-y2%2B5y%2Bx2-5y%2By2+%E4%B8%89.%E8%AE%A1%E7%AE%97%7B%E9%9A%BE%E7%82%B9%7D+%281%29+%284a3b-10b3%29%2B%28-3a2b2%2B10b3%29+%282%29+%284x2y-5xy2%29-%283x2y-)
一.先化简,再求值.(-x2+5+4x)+(5x-4+2x2) 二.计算 (1) x2y-3x2y (2)10y2+0.5y2 (3)-1/2a2bc+1/2cba2 (4)1/4mn-1/3mn+7 (5)7ab-3a2b2+7+8ab2+3a2b2-3-7ab (6)3x3-3x2-y2+5y+x2-5y+y2 三.计算{难点} (1) (4a3b-10b3)+(-3a2b2+10b3) (2) (4x2y-5xy2)-(3x2y-
一.先化简,再求值.(-x2+5+4x)+(5x-4+2x2) 二.计算 (1) x2y-3x2y (2)10y2+0.5y2 (3)-1/2a2bc+1/2cba2 (4)1/4mn-1/3mn+7 (5)7ab-3a2b2+7+8ab2+3a2b2-3-7ab (6)3x3-3x2-y2+5y+x2-5y+y2 三.计算{难点} (1) (4a3b-10b3)+(-3a2b2+10b3) (2) (4x2y-5xy2)-(3x2y-4xy2) (3) 5a2-[a2+(5a2-2a)-2(a2-3a)] (4) (4a2b-3ab)+(-5a2b+2ab) (5) (6m2-4m-3)+(2m2-4m+1) (7) (5a2+2a-1)-4(3-8a+2a2)
一.先化简,再求值.(-x2+5+4x)+(5x-4+2x2) 二.计算 (1) x2y-3x2y (2)10y2+0.5y2 (3)-1/2a2bc+1/2cba2 (4)1/4mn-1/3mn+7 (5)7ab-3a2b2+7+8ab2+3a2b2-3-7ab (6)3x3-3x2-y2+5y+x2-5y+y2 三.计算{难点} (1) (4a3b-10b3)+(-3a2b2+10b3) (2) (4x2y-5xy2)-(3x2y-
就是,题有没有问题哦
x2+9x+1 -2x2y 10.5y2 0 7-1/12mn 4+8ab2 3x3-2x2 4a3b-3a2b2 x2y-xy2 a2-4a -ab-a2b 8m2-8m-2 -3a2+34a-13