1、初一数学上册有理数的混合运算专项练习题3 6 5 ()()(3) 18(3)2(3) 7 7 4 1 1 ( )( ) 22(23)2(12) 5 8 9 1 (0.7)(6) (1)342 (1)2078 6 1 1 1 ()()0 20(3)3(4 6 8 2 1 5 1 ( )( ) 14(30)10(19) 6 4 5 4 1 ( )(40) (1)212 (1)1502 3 3 (6)(7) 18(8) 11(4.5) 1 1 ()() 143(207) (2)224 2 9 120(5)(1) 6.4(10)(0.9)4.9 2 1 1 2 6 4 ()() 9.7()(9.8)
2、7 4 4 5 5 5 5 3 ()()(9) 27(1)3(3) 7 7 1 1 6 ( )( ) 3(10)6(15) 8 4 5 1 (0.9)(8) (1)412 (1)1393 4 1 1 1 ()()0 12(4)3(3 7 8 6 1 9 1 ( )( ) 18(21)3(16) 3 8 2 3 7 ( )(50) (2)412 (1)2279 4 6 (15)(5) 2(5) 11.5(24) 1 1 ()() 115(65) (0)254 5 2 101(8)(17) 5.6(5)(3.9)5.4 2 1 1 4 3 8 ()() 4.6()(8.7) 7 7 5 5 5 5
3、 5 1 ()()(2) 2(3)2(4) 7 7 1 1 6 ( )( ) 16(11)3(12) 3 4 5 1 (0.8)(3) (1)453 (1)1552 7 1 1 1 ()()0 19(4)2(4 4 6 7 1 4 6 ( )( ) 24(15)3(11) 2 5 7 5 1 ( )(50) (1)313 (1)1852 4 7 (17)(20) 10(5) 9(19) 1 1 ()() 83(1510) (0)424 4 7 320(13)(17) 6.1(4.9)(4.5)4.8 2 1 1 3 9 9 ()() 3.4()(4.9) 7 2 2 7 5 5 2 5 ()(
4、)(5) 7(3)2(4) 7 7 1 1 8 ( )( ) 20(27)2(17) 7 8 9 1 (0.3)(90) (2)342 (1)2201 7 1 1 1 ()()0 26(4)2(5 6 4 6 1 6 4 ( )( ) 19(24)3(19) 3 5 3 2 8 ( )(60) (2)453 (1)2247 3 7 (16)(2) 5(18) 5(7) 1 1 ()() 100(710) (4)332 9 9 218(10)(29) 1.8(3.2)(3.3)6.4 2 1 1 3 7 4 ()() 3.8()(5.2) 7 8 4 5 5 5 1 2 ()()(3) 27(3
5、)2(4) 7 7 4 1 4 ( )( ) 11(12)3(14) 5 8 3 1 (0.3)(500) (4)252 (1)1285 2 1 1 1 ()()0 28(1)3(2 8 3 3 1 4 9 ( )( ) 4(25)9(11) 8 3 8 4 3 ( )(30) (4)333 (1)1837 3 4 (2)(6) 20(10) 6.5(13) 1 1 ()() 64(104) (5)422 3 8 383(15)(25) 5.4(9.8)(1.9)8.3 2 1 1 2 3 9 ()() 9.8()(6.1) 7 5 7 5 5 5 5 4 ()()(10) 5(3)2(5)
6、7 7 7 1 2 ( )( ) 2(27)3(16) 8 6 3 1 (0.1)(4) (1)453 (1)2560 8 1 1 1 ()()0 10(4)2(2 3 8 9 1 9 2 ( )( ) 28(22)6(17) 7 8 3 6 6 ( )(10) (4)332 (1)1785 5 7 (4)(2) 18(5) 1(4.5) 1 1 ()() 72(57) (4)223 4 8 64(5)(29) 7.6(2.2)(3.8)1 2 1 1 3 7 3 ()() 9.2()(8.9) 3 8 5 7 5 5 2 4 ()()(2) 15(1)2(4) 7 7 1 1 4 ( )(
7、) 19(24)2(15) 9 8 3 1 (0.2)(800) (5)253 (1)1821 4 1 1 1 ()()0 28(1)3(3 3 4 5 1 5 6 ( )( ) 25(20)10(15) 6 4 5 8 1 ( )(20) (5)322 (1)1482 7 5 (6)(6) 14(8) 6(16.5) 1 1 ()() 73(172) (5)313 8 5 201(24)(13) 1.3(6)(3.7)4.1 2 1 1 1 9 7 ()() 7.9()(8.5) 5 9 4 7 5 5 5 3 ()()(5) 13(3)2(2) 7 7 1 1 4 ( )( ) 4(25)
8、9(20) 5 6 3 1 (0.3)(600) (4)423 (1)2549 7 1 1 1 ()()0 28(1)3(2 4 9 9 1 6 1 ( )( ) 5(23)8(17) 6 7 2 5 1 ( )(30) (3)322 (1)2220 4 5 (19)(1) 5(7) 4(5) 1 1 ()() 142(121) (4)213 3 8 369(15)(4) 7.8(2.9)(2.2)1.7 2 1 1 1 4 4 ()() 2.5()(4.6) 7 7 5 7 5 5 4 5 ()()(9) 21(2)2(1) 7 7 4 1 6 ( )( ) 18(16)7(10) 5 8
9、7 1 (0.2)(20) (1)322 (1)2490 7 1 1 1 ()()0 20(4)3(4 3 3 9 1 7 2 ( )( ) 10(12)6(19) 6 8 3 3 9 ( )(50) (3)322 (1)2575 4 8 (17)(12) 1(10) 14.5(21) 1 1 ()() 202(145) (3)233 8 7 1917(13)(25) 1.9(8.3)(3.1)2.3 2 1 1 4 1 6 ()() 7.1()(9.5) 5 5 7 7 5 5 6 3 ()()(2) 22(4)2(1) 7 7 10 1 4 ( )( ) 16(10)3(11) 9 8 3 1 (0.6)(10) (3)242 (1)1692 4 1 1 1 ()()0 15(2)2(5 9 5 5 1 1 8 ( )( ) 2(11)4(19) 5 2 7 7 1 ( )(80) (2)422 (1)2668 6 2 (18)(13) 3(16) 7(17.5) 1 1 ()() 204(910) (3)214 8 3 2614(28)(18) 5.2(1.1)(0.9)7.8 2 1 1 2 6 7 ()() 1.8()(4.7) 9 5 4 7 5 5
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