试卷导航
1.(1) -8x2y4; (2) a4b6; (3) 2x4y3; (4) 1/4x3y4z; (5) x7y5z3; (6) -2a8b4c5.
2.(1) 10x3-15x2+20x; (2) -6x2+18xy; (3) -a3b-2a2b2; (4) 1/3x3y3-3x2y3 (5)-6m2+m+2 (6)x2-2xy+y2
3.(1)3/32πa2 ; (2)bt+at-t2
4.略.
5.(1)11xy 平方米 11axy 元
(2)(8x+12y)h平方米 (8x+12y)bh元
6.第n个图形共有 n(n+1)枚棋子.
7.(1)(10a+4)(10a+6)=100a(a+1)+24 (2)124x126=15 624 (3)能,如(10a+2)(10a+8)=100a(a+1)+16
8.ac+ad+ae+bc+bd+be+c2+ed+ce
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