七年级数学上册计算题天天练 68.docx

1、七年级数学上册计算题天天练 68 5 3 ()()(6) 25(4)3(2) 7 7 7 1 6 ( )( ） 26(20)5(10) 6 2 7 1 (0.8)(500) (3)452 (1)2404 8 1 1 1 ()()0 26(1)3(5 8 5 3 1 1 7 ( )( ) 13(10)1(16) 8 5 6 1 1 ( )(10) (5)342 (1)2566 6 8 (-20)(-17) 3(-7) 5.5(-4) 1 1 ()() -11-1(-164) (-1)434 6 7 314(-27)(-21) 4.1(-8.1)(-1.7)2.4 2 1 1 3 2 1 ()()

2、 2.7()(9.2) 7 3 3 7 5 5 (5a7) x6(67b) 8a7(4y7z) (6ay)8(2a4b) 1 (146x)z 5(6b7ab9) 5 1 1 (ab)(ef) 2(7by)4(m7q) 9 9 3a(5a2) a(4a6s)(4sa) 2(4b6)4b 9(4b8)(5b1) 5(ab9a)(7a2b) 2(abc2a)2(4a9abc) 2(xy8z)(xy4z) 7(pqpr)(3pqpr) 7 x 1 x 0.3x0.88.78.4x 3 8 9 2 1 3x6x 4(x2)6(x1)16 9 2 1 4 (5x5)x8 9x9(13x)9 6 5 y2

3、y1 4 2.5x5(x3)25 2 5 1 2 (54x)(2x4) 7(9x3)7 3 3 6 6 ()()(4) 26(1)3(2) 7 7 5 1 8 ( )( ） 18(15)1(16) 6 4 9 1 (0.1)(900) (1)253 (1)2217 7 1 1 1 ()()0 30(1)2(5 7 4 7 1 2 6 ( )( ) 8(29)4(18) 3 3 7 1 1 ( )(60) (2)312 (1)2218 5 3 (-17)(-1) 8(-13) -8(-8.5) 1 1 ()() 13-3(-159) (-1)413 5 5 -2517(-7)(-1) 4.4(-

4、3.2)(-4.9)2.1 2 1 1 1 3 3 ()() 6.7()(6.1) 3 7 9 5 5 5 (4y9) y7(27b) 17x9(5b8t) (3xb)5(7y6b) 5 (66y)t 8(4d4bc6) 4 1 1 (xy)(mn) 4(8by)7(m9q) 8 5 5x(9x5) 4x(5x8z)(3z7x) 5(7m4)8m 10(3n6)(2n7) 3(ab3a)(7a5b) 18(abc3a)9(9a9abc) 7(xy5z)(xy7z) 3(pqpr)(8pqpr) 7 x 1 x 0.9x0.218.1x 6 2 3 4 1 8x3x 5(x7)6(x1)8 7 2 1 2 (5x2)x4 5x2(3x)5 3 5 y3 y2 8 2.5x2.5(x5)50 4 5 1 2 (54x)(5x4) 6(6x3)13 5 9