1、初一数学上册计算题专项训练49 2 5 ()()(2) 5(4)2(1) 7 7 9 1 1 ( )( ) 30(19)4(18) 8 6 5 1 (0.1)(90) (3)342 (1)2315 5 1 1 1 ()()0 28(2)3(2 4 3 5 1 1 1 ( )( ) 14(24)9(11) 2 8 3 1 1 ( )(90) (2)423 (1)2482 3 2 (12)(16) 12(12) 3(15) 1 1 ()() 193(33) (2)332 3 4 3213(13)(22) 3.7(6)(2.1)5.1 2 1 1 4 9 8 ()() 7.5()(2.7) 5 6
2、2 5 5 5 (8y1) x5(63c) 10m9(9n7t) (9mn)3(7y3c) 7 (184x)t 9(6a7xy1) 8 1 1 (yz)(ef) 3(9ax)4(m8p) 5 8 6x(5x4) x(7x9c)(3cx) 6(3s2)4s 1(8x2)(2x3) 8(ab5a)(4a3b) 6(abc9a)8(4a4abc) 3(xy3z)(xy4z) 6(pqpr)(3pqpr) 7 x 1 x 0.5x0.32.67.9x 9 2 3 4 1 4x6x 8(x2)9(x5)14 9 5 1 4 (5x2)x4 3x6(18x)3 3 5 y3 y1 3 3x7(x8)25
3、2 5 0.2x0.60.45.6x 7(7x4)11 6 5 ()()(4) 2(1)2(4) 7 7 1 1 8 ( )( ) 16(19)2(11) 6 4 9 1 (0.4)(50) (3)442 (1)1534 4 1 1 1 ()()0 21(1)3(3 2 5 9 1 1 1 ( )( ) 24(24)1(14) 2 2 8 1 1 ( )(80) (5)423 (1)1516 2 2 (6)(19) 10(9) 12(14) 1 1 ()() 152(22) (2)242 5 6 1620(8)(20) 4.4(9.9)(0.7)9.2 2 1 1 4 4 1 ()() 2.4
4、()(2.5) 5 6 7 5 5 5 (7b5) y6(85c) 11m4(7n4t) (7mn)9(2b7c) 1 (142y)t 6(8d7mn7) 4 1 1 (bc)(ef) 5(8ay)7(m2p) 7 5 8y(7y5) y(2y4z)(4zy) 7(5s4)5s 10(2n8)(2n9) 7(ab8a)(9a2b) 19(abc2a)9(7a6abc) 9(xy8z)(xy2z) 5(pqpr)(2pqpr) 5 x 1 x 0.7x0.229.1x 9 2 3 4 1 8x6x 4(x1)5(x2)19 5 7 1 3 (5x7)x4 3x5(6x)4 4 5 y2 y1 6
5、 5x7.5(x2)35 2 6 0.8x0.26.34.6x 2(3x9)1 3 6 ()()(2) 14(2)3(1) 7 7 1 1 1 ( )( ) 19(18)9(19) 7 8 7 1 (0.8)(80) (5)442 (1)2176 7 1 1 1 ()()0 2(3)2(1 5 3 6 1 4 1 ( )( ) 12(17)6(18) 4 5 3 1 1 ( )(70) (5)223 (1)1906 7 7 (4)(13) 11(2) 5(1) 1 1 ()() 190(199) (5)252 3 2 1616(12)(8) 3.4(2.3)(0.6)9.3 2 1 1 1 6
6、 3 ()() 8.6()(9.9) 7 8 3 5 5 5 (3b6) x8(77c) 17m2(3b3t) (2mb)7(9b7c) 2 (142x)t 2(3c4xy3) 3 1 1 (bc)(ef) 2(6ay)5(n7q) 6 2 8a(7a8) 2a(2a5d)(9d7a) 2(8m3)6m 6(8b4)(5b8) 5(ab5a)(5a9b) 12(abc2a)7(3a9abc) 5(xy5z)(xy4z) 2(pqpr)(5pqpr) 7 x 1 x 0.8x0.76.67.1x 9 4 6 4 1 9x1x 4(x9)6(x9)7 5 6 1 4 (2x5)x1 8x5(19x
7、)2 9 5 y3 y1 4 0.5x0.5(x3)25 2 5 0.2x0.56.70.1x 8(5x6)14 6 2 ()()(1) 10(4)3(2) 7 7 1 1 8 ( )( ) 30(28)2(13) 3 4 9 1 (0.9)(2) (5)253 (1)2237 6 1 1 1 ()()0 9(1)2(1 4 8 7 1 1 1 ( )( ) 7(28)6(14) 4 3 4 5 1 ( )(70) (2)322 (1)1482 4 8 (10)(14) 14(12) 14.5(1.5) 1 1 ()() 104(71) (2)334 8 2 325(16)(26) 7.1(0
8、.3)(5)1.1 2 1 1 2 3 7 ()() 2.1()(2.4) 3 5 4 7 5 5 (3b8) z7(26b) 17a6(8b6z) (8ab)4(7b7b) 5 (164z)z 8(4a8ab1) 6 1 1 (xy)(pq) 5(9bx)8(n5p) 3 9 3m(8m6) m(4m5z)(8zm) 4(4n9)8n 2(2a2)(6a7) 5(ab8a)(7a5b) 11(abc8a)7(4a5abc) 6(xy6z)(xy7z) 3(pqpr)(4pqpr) 7 x 1 x 0.3x0.29.73.3x 9 8 9 2 1 5x8x 9(x5)7(x3)11 7 7 1
9、 3 (6x5)x9 7x5(6x)8 2 5 y1 y1 7 1x1(x4)30 4 6 0.9x0.42.16.1x 4(7x3)9 5 4 ()()(6) 30(3)3(4) 7 7 4 1 8 ( )( ) 29(30)9(11) 3 2 9 1 (0.5)(90) (1)443 (1)1625 6 1 1 1 ()()0 18(3)2(2 5 9 9 1 7 1 ( )( ) 18(29)3(12) 5 8 7 1 2 ( )(40) (1)352 (1)1709 4 3 (16)(11) 12(20) 1.5(18) 1 1 ()() 170(810) (5)313 6 7 111
10、6(2)(7) 2.8(0.2)(4.4)6.3 2 1 1 2 8 9 ()() 1.9()(7.9) 7 3 7 7 5 5 (2n4) y7(46a) 14m6(9n7c) (9mn)2(4n5a) 6 (208y)c 5(6a8ab2) 7 1 1 (bc)(ef) 3(7bx)8(m2p) 4 8 9y(9y4) y(9y4c)(6c8y) 8(2s2)7s 2(6b10)(4b9) 9(ab7a)(9a6b) 19(abc5a)6(9a7abc) 2(xy9z)(xy6z) 9(pqpr)(6pqpr) 7 x 1 x 0.8x0.48.27.6x 6 6 9 4 1 5x1x 6(x4)6(x9)20 5 3 1 1 (6x8)x3 3x8(1x)8 8 5 y3 y3 8 5x5(x6)20 2 6 0.7x0.51.54.4x 7(9x2)13
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