1、(0.1)(400) (3)213 (1)2782 5 1 1 1 ()()0 6(3)3(4 4 3 6 1 1 6 ( )( ) 14(22)3(13) 8 8 7 3 3 ( )(20) (5)342 (1)2130 2 2 (-12)(-9) 17(-16) -12.5(-9) 1 1 ()() -141(-63) (-4)414 4 4 2518(-13)(-21) 2.4(-9)(-4)10 2 1 1 1 3 6 ()() 1.8()(7.5) 5 4 5 7 5 5 (4m5) z4(67b) 7x3(3n9z) (3xn)7(9m7b) 1 (210z)z 9(2b7ab8)
2、 5 (ab)(st) 2(6by)6(n3p) 2 7 6y(4y6) 8y(3y7z)(2zy) 7(2b6)4b 1(5n9)(4n7) 9(ab7a)(3a6b) 9(abc3a)4(5a8abc) 5(xy9z)(xy4z) 6(pqpr)(2pqpr) 5 x 1 x 0.8x0.39.96.9x 3 6 9 2 1 7x8x 7(x2)4(x6)19 5 9 1 2 (6x9)x5 2x2(17x)7 5 5 y2 y3 8 4x4(x7)30 3 5 (42x)(3x5) 7(7x8)19 2 7 6 5 ()()(2) 7(2)3(1) 1 1 1 ( )( ) 4(18)2
3、(17) 2 6 3 (0.4)(6) (2)343 (1)2476 6 0 12(2)2 3 3 8 1 1 1 ( )( ) 15(17)8(20) 6 4 2 1 1 ( )(10) (4)232 (1)1612 7 5 (-15)(-1) 9(-1) 7.5(-12.5)() -7-1(-96) (-5)222 7 9 203(-6)(-23) 9(-9.6)(-0.6)2 2 1 1 1 1 2 ()() 8.7()(4.5) 5 9 5 5 5 5 (8x2) x3(79b) 10x7(3b2t) (5xb)8(2x2b) 7 (124x)t 4(6c9mn6) 6 (xy)(pq) 5(9ax)9(n2q) 2 3 2n(8n3) n(3n3z)(8z5n) 3(7t10)6t 10(5y4)(8y1) 5(ab2a)(4a2b) 6(abc3a)5(4a5abc) 5(xy3z)(xy8z) 9(pqpr)(6pqpr) 7 x 1 x 0.3x0.75.11.4x 3 4 6 7x9x 4(x2)7(x2)13 3 8 1 3 (2x2)x8 6x7(18x)2 3 5 y2 y2 4 3.5x0.5(x5)10 4 5 (33x)(3x1) 9(7x9)7 9 5