问题标题:
【人教数学八年级上164页第三题1)(6x^4-8x^3)÷(-2x^2)(2)(8a^3b-5a^2b^2)÷4ab(3)(2/5y^3-7y^2+2/3y)÷2/3y(4)(0.25a^2b-1/2a^3b^2-1/6a^4b^3)÷(-0.5a^2b)】
问题描述:
人教数学八年级上164页第三题
1)(6x^4-8x^3)÷(-2x^2)
(2)(8a^3b-5a^2b^2)÷4ab
(3)(2/5y^3-7y^2+2/3y)÷2/3y
(4)(0.25a^2b-1/2a^3b^2-1/6a^4b^3)÷(-0.5a^2b)
董德斌回答:
(1)-3x^2+4x
(2)2a^2-1.23ab
(3)0.6y^2-10.5y+1
(4)-0.5+ab+1/3a^2b^2
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