1、初一数学上册计算题专项训练77 6 4 ()()(9) 25(4)2(1) 7 7 8 1 2 ( )( ) 20(23)6(17) 7 6 3 1 (0.2)(1000) (2)312 (1)2584 5 1 1 1 ()()0 19(2)2(5 3 8 6 1 9 4 ( )( ) 19(20)8(18) 5 8 5 1 7 ( )(80) (5)413 (1)2922 5 6 (9)(4) 11(15) 11.5(8) 1 1 ()() 174(131) (0)343 5 2 2713(20)(20) 1.8(3.1)(2.8)1.2 2 1 1 4 2 3 ()() 4.8()(7.2
2、) 5 9 7 5 5 5 (8y7) z5(28a) 8a2(2n6t) (4an)5(4y5a) 8 (28z)t 3(7d7mn4) 7 1 1 (yz)(st) 4(9bx)9(n2q) 7 3 3b(5b5) b(6b4c)(7c9b) 2(3s1)5s 2(5x7)(3x8) 8(ab8a)(6a5b) 15(abc5a)3(4a3abc) 6(xy7z)(xy9z) 5(pqpr)(6pqpr) 7 x 1 x 0.7x0.90.11x 6 4 3 2 1 6x5x 6(x8)5(x5)3 7 5 1 1 (3x5)x8 3x5(14x)1 5 5 y2 y1 6 5x5.5(x
3、3)20 4 5 0.6x0.53.87.1x 3(6x2)11 6 4 ()()(4) 12(3)2(5) 7 7 1 1 10 ( )( ) 1(23)3(19) 3 6 9 1 (0.4)(6) (2)243 (1)2812 3 1 1 1 ()()0 8(4)2(5 3 9 2 1 3 7 ( )( ) 26(15)9(11) 4 2 6 6 1 ( )(100) (5)452 (1)2666 5 2 (2)(19) 17(18) 9.5(12) 1 1 ()() 202(26) (4)332 4 4 126(30)(4) 6.6(7.7)(1.4)2.3 2 1 1 4 8 9 ()
4、() 4.6()(2.7) 5 6 2 7 5 5 (7m6) y8(96a) 9m5(3n2z) (4mn)9(4m9a) 1 (106y)z 2(2d7xy6) 8 1 1 (ab)(pq) 4(6bx)2(m9p) 7 8 5y(3y2) y(2y7d)(5dy) 3(6m3)5m 3(6n3)(6n4) 9(ab3a)(4a4b) 12(abc9a)9(5a7abc) 6(xy4z)(xy7z) 9(pqpr)(3pqpr) 5 x 1 x 0.7x0.41.52.3x 6 4 3 8 1 8x3x 6(x1)2(x3)18 5 4 1 3 (7x9)x5 3x8(16x)7 9 5
5、y2 y3 6 1.5x5.5(x7)35 3 6 0.6x0.69.16x 7(6x1)13 4 3 ()()(10) 21(4)3(5) 7 7 7 1 6 ( )( ) 3(16)4(19) 8 4 5 1 (0.2)(10) (3)313 (1)1310 7 1 1 1 ()()0 18(4)2(5 7 3 3 1 5 4 ( )( ) 9(18)1(18) 8 4 3 1 8 ( )(20) (5)322 (1)1929 4 7 (4)(1) 7(1) 14.5(2) 1 1 ()() 202(16) (0)423 6 9 1415(11)(21) 3.3(1.9)(1.6)6.7
6、2 1 1 2 3 8 ()() 7.5()(6.1) 7 8 5 5 5 5 (4x2) x4(24a) 13m8(6n7t) (3mn)6(2x8a) 10 (88x)t 3(2b4mn8) 9 1 1 (ab)(ef) 2(7by)2(m7q) 2 4 9b(9b1) 4b(4b7q)(7qb) 7(3b8)4b 4(5m5)(4m7) 3(ab2a)(4a6b) 3(abc4a)3(5a4abc) 9(xy9z)(xy9z) 2(pqpr)(8pqpr) 7 x 1 x 0.7x0.56.15.8x 9 8 6 2 1 5x4x 5(x4)7(x7)15 9 6 1 2 (6x1)x6
7、 9x4(1x)3 4 5 y3 y2 8 1x2.5(x5)15 2 6 0.4x0.82.43.9x 4(5x4)17 5 1 ()()(6) 18(1)3(4) 7 7 1 1 1 ( )( ) 22(30)6(15) 9 2 5 1 (0.7)(4) (1)242 (1)1665 6 1 1 1 ()()0 9(3)3(4 7 5 9 1 3 3 ( )( ) 17(12)10(18) 3 4 2 1 1 ( )(80) (5)212 (1)2920 4 6 (2)(15) 19(7) 2(3) 1 1 ()() 172(47) (0)222 8 3 32(23)(12) 0.1(2.
8、6)(1.8)3 2 1 1 4 6 4 ()() 8.2()(2.5) 7 5 9 7 5 5 (8x4) x8(48b) 6a2(8b6z) (6ab)6(3x3b) 7 (24x)z 6(9c6xy3) 6 1 1 (ab)(mn) 4(9ay)5(n6q) 7 6 9n(6n3) n(8n5p)(7pn) 4(7a3)3a 10(3x10)(3x9) 7(ab4a)(2a2b) 6(abc3a)2(4a9abc) 5(xy4z)(xy8z) 7(pqpr)(3pqpr) 5 x 1 x 0.1x0.30.33.6x 6 2 9 8 1 3x9x 5(x1)7(x2)15 7 8 1 2
9、 (6x2)x7 6x8(2x)1 9 5 y3 y2 9 3.5x0.5(x7)15 3 6 0.2x0.93.67.1x 8(6x7)14 2 2 ()()(8) 4(2)3(4) 7 7 6 1 2 ( )( ) 14(29)4(15) 7 2 3 1 (0.6)(400) (5)442 (1)1854 7 1 1 1 ()()0 11(2)3(1 9 9 4 1 1 1 ( )( ) 14(18)5(19) 6 7 8 1 1 ( )(90) (3)212 (1)2041 8 5 (8)(19) 15(19) 3(12.5) 1 1 ()() 92(59) (1)322 6 5 357
10、(18)(21) 6.5(1.9)(2.7)4.3 2 1 1 3 6 8 ()() 1.6()(9.6) 7 2 8 7 5 5 (3a4) x4(59c) 10m9(2n9z) (2mn)2(6a6c) 10 (122x)z 9(2a6ab7) 9 1 1 (ab)(pq) 2(9ay)8(n4p) 4 2 4m(3m4) 4m(3m8q)(5qm) 3(4b10)3b 2(2b5)(5b8) 7(ab7a)(5a8b) 15(abc3a)5(2a8abc) 2(xy7z)(xy6z) 4(pqpr)(2pqpr) 5 x 1 x 0.7x0.74.39.5x 9 4 6 2 1 2x5x 6(x9)4(x8)14 9 6 1 3 (3x9)x1 8x3(8x)2 3 5 y1 y2 3 4x4.5(x3)50 4 5 0.3x0.612.7x 9(3x2)6
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