一、(1)m-2(3-2n) (2)x-3(4-2m) (3)(8a-7b)-(4a-5b); (4)-(5x+y)-3(2x-3y)二、(1)a-(b+c)=_________. (2)c-(b-a)=_________. (3)2x-(2-5x)=__________. (4)3x2y+(2x-5x2y)=__________.
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一、(1)m-2(3-2n) (2)x-3(4-2m) (3)(8a-7b)-(4a-5b); (4)-(5x+y)-3(2x-3y)二、(1)a-(b+c)=_________. (2)c-(b-a)=_________. (3)2x-(2-5x)=__________. (4)3x2y+(2x-5x2y)=__________.
一、(1)m-2(3-2n) (2)x-3(4-2m) (3)(8a-7b)-(4a-5b); (4)-(5x+y)-3(2x-3y)
二、(1)a-(b+c)=_________. (2)c-(b-a)=_________. (3)2x-(2-5x)=__________. (4)3x2y+(2x-5x2y)=__________. 第一题要过程 ,第二题是答案 下下了
化简:a-(2a-3b)+(3a-4b) O(∩_∩)O谢谢
一、(1)m-2(3-2n) (2)x-3(4-2m) (3)(8a-7b)-(4a-5b); (4)-(5x+y)-3(2x-3y)二、(1)a-(b+c)=_________. (2)c-(b-a)=_________. (3)2x-(2-5x)=__________. (4)3x2y+(2x-5x2y)=__________.
一、(1)m-2(3-2n)=m-6+4n=m+4n-6
(2)x-3(4-2m) =x-12+6m=x+6m-12
(3)(8a-7b)-(4a-5b)=8a-7b-4a+5b=4a-2b
(4)-(5x+y)-3(2x-3y)=-5x-y-6x+9y=-11x+8y
二、1)a-(b+c)=a-b-c_________. (2)c-(b-a)=__c-b+a_______.
(3)2x-(2-5x)=_7x-2_________. (4)3x2y+(2x-5x2y)=_-2x^2y+2x_________.
三、 a-(2a-3b)+(3a-4b)
=a-2a+3b+3a-4b
=2a-b
一、(1)m+4n-6 ;(2)x+6m-12 ;(3)4a-2b ;(4)-9a+8y
二、、(1)a-b-c; (2)(a+c)-b; (3)7x-2; (4)2x-2x2y
补充题:化简:原式=a-2a+3b+3a-4b=2a-b