1、初一数学上册有理数的混合运算专项练习题120 2 4 ()()(4) 3(1)2(2) 7 7 3 1 2 ( )( ) 3(21)5(17) 4 2 3 1 (0.5)(400) (3)323 (1)1062 2 1 1 1 ()()0 24(3)3(5 6 6 5 1 4 5 ( )( ) 29(28)5(16) 3 3 6 5 3 ( )(90) (4)433 (1)1519 4 4 (6)(20) 11(17) 13.5(13.5) 1 1 ()() 150(54) (0)443 7 6 3016(22)(18) 5.7(7.4)(3)4.5 2 1 1 3 3 6 ()() 5.6(
2、)(3.4) 7 9 6 5 5 5 5 1 ()()(6) 24(4)2(1) 7 7 1 1 10 ( )( ) 14(16)4(19) 9 2 9 1 (0.9)(20) (1)353 (1)2856 5 1 1 1 ()()0 10(4)3(4 2 7 3 1 1 4 ( )( ) 1(28)1(10) 2 6 5 7 8 ( )(20) (2)453 (1)1044 6 7 (2)(13) 0(20) 9(14.5) 1 1 ()() 33(35) (4)253 8 6 1714(15)(8) 2.1(3.3)(4.1)6.1 2 1 1 4 4 6 ()() 9.9()(7.9)
3、7 3 3 5 5 5 3 1 ()()(4) 14(4)3(2) 7 7 1 1 8 ( )( ) 9(27)6(20) 8 4 7 1 (0.6)(40) (3)413 (1)2512 2 1 1 1 ()()0 1(3)3(2 9 9 6 1 6 1 ( )( ) 15(10)6(11) 7 5 2 3 1 ( )(50) (4)412 (1)1273 4 2 (14)(14) 7(14) 4.5(2) 1 1 ()() 41(126) (5)443 5 7 352(1)(18) 7.4(4.5)(4.9)6.9 2 1 1 4 8 7 ()() 8.4()(7.1) 5 9 7 7 5
4、 5 1 2 ()()(4) 11(1)2(5) 7 7 1 1 1 ( )( ) 27(25)8(12) 8 2 7 1 (0.8)(1) (5)332 (1)2752 2 1 1 1 ()()0 10(3)3(5 7 5 2 1 1 1 ( )( ) 22(21)6(11) 7 3 6 1 3 ( )(50) (5)213 (1)2141 4 4 (12)(4) 12(18) 6(20.5) 1 1 ()() 23(76) (2)444 3 2 3019(23)(23) 2.1(5.8)(1.2)6.1 2 1 1 4 1 3 ()() 6.3()(8.9) 3 4 4 7 5 5 4 6
5、 ()()(7) 25(3)3(2) 7 7 8 1 6 ( )( ) 25(13)6(13) 7 8 5 1 (0.4)(3) (4)342 (1)1542 2 1 1 1 ()()0 4(3)3(3 9 6 3 1 1 3 ( )( ) 6(26)7(12) 4 6 4 4 1 ( )(100) (3)343 (1)2971 3 8 (20)(10) 9(6) 11(10) 1 1 ()() 31(148) (1)334 7 6 407(28)(8) 8.4(8.8)(2.4)1.3 2 1 1 4 9 3 ()() 6.9()(4.4) 5 8 9 7 5 5 2 5 ()()(8) 5
6、(1)2(1) 7 7 4 1 10 ( )( ) 1(29)4(18) 5 2 9 1 (0.9)(5) (3)352 (1)2390 9 1 1 1 ()()0 13(2)3(3 3 6 6 1 5 5 ( )( ) 16(29)8(15) 7 6 6 1 9 ( )(10) (5)423 (1)1425 3 8 (5)(7) 11(9) 14.5(24.5) 1 1 ()() 121(148) (3)254 6 7 2917(23)(21) 7.2(2)(3.5)9 2 1 1 2 7 7 ()() 3.7()(8.6) 7 6 8 7 5 5 1 5 ()()(9) 26(2)3(2)
7、 7 7 1 1 4 ( )( ) 11(10)8(10) 2 4 3 1 (0.9)(6) (4)443 (1)1722 9 1 1 1 ()()0 4(1)2(1 3 5 9 1 4 1 ( )( ) 1(20)9(16) 6 5 2 2 1 ( )(80) (5)213 (1)1480 3 4 (13)(10) 3(10) 15(10.5) 1 1 ()() 83(110) (1)452 6 3 289(9)(12) 7.6(4.4)(4.4)9.8 2 1 1 2 8 8 ()() 3.5()(5.6) 9 4 2 5 5 5 3 6 ()()(8) 26(1)3(5) 7 7 1 1
8、 8 ( )( ) 19(19)4(19) 7 6 9 1 (0.9)(500) (4)333 (1)1526 9 1 1 1 ()()0 6(2)2(3 7 2 7 1 4 4 ( )( ) 1(14)1(20) 7 3 5 1 1 ( )(70) (3)313 (1)2568 8 5 (2)(12) 10(12) 9.5(23.5) 1 1 ()() 161(109) (3)413 8 5 2514(5)(22) 8.5(5.3)(3.3)1.6 2 1 1 3 8 3 ()() 5.2()(6.9) 5 9 2 7 5 5 4 2 ()()(5) 23(4)2(3) 7 7 10 1 4
9、 ( )( ) 3(19)6(19) 9 4 3 1 (0.6)(800) (1)322 (1)2815 2 1 1 1 ()()0 3(2)2(1 7 9 6 1 1 1 ( )( ) 20(12)5(14) 4 6 4 3 3 ( )(60) (3)443 (1)2949 2 2 (15)(4) 7(4) 13.5(4.5) 1 1 ()() 75(1610) (0)424 4 9 1511(6)(28) 7.4(8.8)(0.2)7 2 1 1 1 7 8 ()() 4.7()(6.8) 7 2 9 5 5 5 2 3 ()()(2) 4(2)2(3) 7 7 2 1 4 ( )( ) 4(24)1(13) 3 6 3 1 (0.6)(100) (1)413 (1)2658 8 1 1 1 ()()0 18(1)3(1 8 4 9 1 4 1 ( )( ) 22(29)2(18) 4 5 2 1 9 ( )(30) (3)442 (1)2363 2 8 (16)(2) 17(18) 13(3.5) 1 1 ()() 64(74) (1)344 8 4 17(15)(14) 3.4(0.7)(4.3)7.7 2 1 1 1 6 6 ()() 2.8()(3.2) 9 9 3 5 5 5
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