初一数学上册计算题专项训练45.docx

1、初一数学上册计算题专项训练45 6 4 ()()(2) 17(2)3(4) 7 7 7 1 1 ( )( ） 7(24)8(11) 6 8 7 1 (0.5)(1000) (3)342 (1)2927 3 1 1 1 ()()0 13(1)2(4 8 4 2 1 6 5 ( )( ) 2(16)8(20) 5 5 6 4 1 ( )(100) (4)242 (1)1711 5 2 (2)(8) 15(15) 8.5(8) 1 1 ()() 141(19) (5)233 6 3 345(3)(28) 9.2(0.8)(2.7)0.2 2 1 1 4 1 2 ()() 8.6()(8.3) 9 2

2、 6 7 5 5 (2y3) y8(64a) 15m6(6b4z) (8mb)4(4y9a) 1 (46y)z 7(2b6mn2) 2 1 1 (bc)(pq) 3(6ax)8(m8p) 4 6 2y(8y1) y(2y6q)(8qy) 4(7t9)9t 10(5n2)(5n5) 6(ab2a)(9a2b) 4(abc2a)7(9a4abc) 8(xy7z)(xy7z) 8(pqpr)(4pqpr) 7 x 1 x 0.3x0.31.23.3x 6 6 6 8 1 3x9x 5(x1)7(x1)18 7 7 1 4 (2x3)x9 9x2(1x)2 6 5 y3 y1 9 4x4(x4)20

3、3 5 0.1x0.71.91.3x 4(9x6)19 1 3 ()()(7) 28(4)2(2) 7 7 1 1 2 ( )( ） 1(28)2(19) 5 8 3 1 (0.6)(1000) (4)252 (1)1937 8 1 1 1 ()()0 21(1)2(5 5 9 7 1 6 9 ( )( ) 24(11)9(11) 6 5 8 1 1 ( )(90) (4)253 (1)2702 5 2 (3)(16) 2(10) 12(19) 1 1 ()() 165(195) (0)332 9 8 2318(2)(3) 5.8(5)(0.6)8.6 2 1 1 3 6 4 ()() 2.1

4、()(6.2) 3 5 3 5 5 5 (6x7) z4(25c) 16m2(7y2z) (2my)7(2x9c) 4 (106z)z 2(8c4ab8) 3 1 1 (xy)(st) 3(8bx)3(n4p) 6 2 8b(8b1) b(4b3s)(6sb) 6(5a9)7a 5(9b8)(2b7) 8(ab7a)(2a2b) 11(abc9a)5(2a3abc) 3(xy3z)(xy7z) 3(pqpr)(9pqpr) 5 x 1 x 0.2x0.50.51.5x 3 8 6 2 1 2x9x 3(x3)6(x4)3 3 3 1 1 (2x5)x3 5x3(7x)9 4 5 y3 y3 8

5、 2.5x2.5(x3)50 3 5 0.8x0.66.55.6x 9(4x1)3 6 1 ()()(10) 4(4)3(1) 7 7 1 1 6 ( )( ） 9(18)6(10) 8 2 5 1 (0.6)(700) (1)423 (1)1975 8 1 1 1 ()()0 23(1)2(3 9 3 8 1 6 1 ( )( ) 4(21)6(16) 5 7 6 8 1 ( )(100) (4)413 (1)2509 7 5 (2)(20) 6(9) 9.5(8.5) 1 1 ()() 183(134) (0)413 9 6 2315(23)(27) 1.1(8)(5)1.2 2 1 1

6、3 9 6 ()() 6.3()(9.4) 5 8 9 5 5 5 (3n2) y8(85a) 3m9(7y7t) (3my)2(4n9a) 7 (162y)t 9(4a4xy1) 8 1 1 (yz)(st) 2(8bx)9(n5q) 6 6 3y(4y1) y(7y8c)(7c8y) 5(8a2)5a 2(3y9)(8y6) 3(ab6a)(4a7b) 12(abc6a)6(9a3abc) 3(xy7z)(xy9z) 2(pqpr)(5pqpr) 5 x 1 x 0.6x0.33.71.1x 9 6 6 4 1 6x1x 4(x8)2(x1)1 5 3 1 1 (2x8)x9 4x5(12

7、x)2 5 5 y1 y2 6 1.5x6(x9)45 3 5 0.6x0.23.98.2x 3(8x2)20 3 2 ()()(4) 19(2)2(1) 7 7 1 1 4 ( )( ） 11(22)6(11) 7 6 5 1 (0.6)(3) (2)433 (1)2172 3 1 1 1 ()()0 25(2)2(1 6 9 3 1 4 1 ( )( ) 3(25)8(19) 4 3 5 1 1 ( )(90) (4)343 (1)2738 5 6 (7)(15) 15(17) 12(8.5) 1 1 ()() 22(153) (5)212 8 5 1610(2)(15) 7.2(1.5)

8、(4.8)6.3 2 1 1 4 9 6 ()() 9.8()(8.1) 7 3 3 5 5 5 (8x7) z3(95c) 18m6(2y6z) (2my)9(6x8c) 4 (104z)z 7(7b6bc2) 3 1 1 (ab)(pq) 4(6by)6(m8q) 5 3 4n(5n4) n(5n8z)(4zn) 9(5s2)3s 2(2n1)(9n1) 9(ab2a)(5a7b) 8(abc2a)6(4a2abc) 8(xy4z)(xy4z) 3(pqpr)(6pqpr) 5 x 1 x 0.5x0.67.23.7x 3 4 9 4 1 8x5x 9(x3)3(x6)1 9 5 1 1

9、(9x8)x7 2x4(13x)4 3 5 y2 y2 6 2x8.5(x7)20 2 6 0.7x0.77.24.1x 3(9x5)3 5 1 ()()(10) 9(1)2(5) 7 7 1 1 8 ( )( ） 10(20)3(19) 4 2 9 1 (0.3)(30) (2)452 (1)1302 2 1 1 1 ()()0 18(4)2(5 4 7 3 1 5 4 ( )( ) 27(22)1(18) 4 4 5 1 3 ( )(20) (1)222 (1)2103 7 2 (16)(17) 6(15) 6(2) 1 1 ()() 51(149) (5)243 8 6 1014(7)(

10、11) 5.6(2.3)(1.3)8.7 2 1 1 4 2 8 ()() 9.3()(2.4) 5 3 9 7 5 5 (5n8) z2(66c) 3a7(7y7t) (6ay)3(4n4c) 3 (1210z)t 8(5a8bc3) 4 1 1 (bc)(st) 2(6ay)3(m5p) 5 3 2m(3m2) 8m(6m4p)(9p2m) 5(2s6)8s 3(7x5)(5x5) 7(ab2a)(7a3b) 10(abc7a)8(3a5abc) 9(xy5z)(xy4z) 7(pqpr)(2pqpr) 7 x 1 x 0.4x0.480.5x 6 6 6 8 1 8x2x 2(x2)3(x4)3 3 9 1 1 (7x1)x6 6x7(10x)8 7 5 y1 y1 6 1.5x6(x9)40 3 6 0.4x0.32.54.5x 4(9x2)6