1、初一数学上册有理数的混合运算专项练习题23 3 4 ()()(2) 18(3)2(3) 7 7 3 1 1 ( )( ) 12(30)2(14) 4 6 7 1 (0.8)(200) (4)452 (1)2879 8 1 1 1 ()()0 8(3)3(1 2 5 2 1 6 7 ( )( ) 10(14)7(15) 6 7 6 6 1 ( )(20) (2)313 (1)1916 7 5 (4)(16) 4(1) 3.5(3.5) 1 1 ()() 42(152) (2)223 8 7 206(20)(26) 7.8(6.1)(1.6)3.5 2 1 1 2 7 3 ()() 3.8()(5
2、.1) 3 6 3 5 5 5 3 2 ()()(8) 30(1)2(2) 7 7 1 1 1 ( )( ) 26(25)1(12) 5 8 5 1 (0.3)(3) (5)443 (1)1783 5 1 1 1 ()()0 16(4)2(3 3 9 9 1 8 4 ( )( ) 21(25)6(11) 2 7 3 3 1 ( )(50) (1)232 (1)1303 2 6 (16)(1) 10(18) 13(14.5) 1 1 ()() 05(74) (1)343 9 2 3712(17)(16) 7.3(8.3)(0.5)10 2 1 1 3 8 9 ()() 7.9()(4.9) 3
3、8 8 7 5 5 6 3 ()()(4) 28(2)2(4) 7 7 6 1 10 ( )( ) 21(12)8(18) 5 6 9 1 (0.7)(100) (1)413 (1)2641 7 1 1 1 ()()0 13(2)3(1 8 6 6 1 1 4 ( )( ) 17(12)4(12) 6 2 5 2 1 ( )(40) (5)233 (1)2456 3 2 (17)(10) 20(1) 4(24.5) 1 1 ()() 105(201) (5)342 6 4 314(18)(1) 9.5(2.6)(4.6)3.3 2 1 1 1 2 2 ()() 8.7()(7.6) 5 6 8
4、 5 5 5 3 5 ()()(6) 12(1)3(1) 7 7 1 1 1 ( )( ) 29(19)9(14) 4 4 5 1 (0.8)(5) (3)353 (1)2174 6 1 1 1 ()()0 7(1)3(2 6 8 7 1 3 6 ( )( ) 7(22)10(19) 6 4 5 6 5 ( )(80) (2)342 (1)2556 5 4 (12)(1) 5(5) 7.5(6.5) 1 1 ()() 123(112) (3)324 5 6 3210(14)(2) 2.7(2.4)(1.7)4.2 2 1 1 1 9 7 ()() 3.9()(2.8) 3 6 5 7 5 5
5、6 6 ()()(8) 30(4)3(1) 7 7 1 1 1 ( )( ) 5(27)2(12) 4 8 9 1 (0.2)(800) (1)342 (1)2500 4 1 1 1 ()()0 18(3)3(2 5 4 4 1 1 4 ( )( ) 5(10)3(14) 2 2 5 6 3 ( )(90) (1)232 (1)1607 7 2 (20)(18) 7(7) 11.5(3) 1 1 ()() 93(27) (0)443 8 2 3211(25)(17) 7.8(3.9)(4.4)0.7 2 1 1 1 2 8 ()() 7.2()(8.2) 3 4 4 5 5 5 5 4 ()(
6、)(6) 21(1)3(4) 7 7 6 1 8 ( )( ) 5(10)9(18) 5 6 7 1 (0.3)(300) (5)253 (1)1271 5 1 1 1 ()()0 6(1)2(2 3 7 2 1 1 4 ( )( ) 25(16)8(19) 7 3 5 9 3 ( )(80) (3)212 (1)1497 8 4 (17)(10) 5(8) 1(5) 1 1 ()() 134(53) (0)232 5 8 618(21)(8) 5.2(4.9)(4.2)1.7 2 1 1 1 9 8 ()() 7.8()(6.1) 5 7 4 7 5 5 2 4 ()()(2) 17(2)2
7、(5) 7 7 1 1 1 ( )( ) 9(21)9(16) 8 2 9 1 (0.1)(70) (4)332 (1)2685 8 1 1 1 ()()0 29(2)3(4 4 3 8 1 9 5 ( )( ) 12(10)10(14) 7 8 6 7 1 ( )(20) (4)452 (1)2768 6 8 (11)(5) 10(14) 10.5(8.5) 1 1 ()() 24(144) (4)223 5 6 4019(21)(19) 7.5(0.3)(4.6)0.3 2 1 1 1 7 2 ()() 8.2()(7.9) 9 6 9 5 5 5 3 6 ()()(10) 10(3)3(
8、4) 7 7 4 1 2 ( )( ) 4(26)3(20) 3 4 3 1 (0.5)(100) (5)443 (1)1123 6 1 1 1 ()()0 6(1)3(5 5 5 9 1 2 4 ( )( ) 19(23)2(11) 4 3 3 5 5 ( )(10) (4)333 (1)1899 6 4 (3)(19) 16(9) 7(16.5) 1 1 ()() 31(28) (3)254 8 7 1618(2)(1) 6(7.3)(1)1.6 2 1 1 2 4 3 ()() 8.7()(1.3) 7 8 2 7 5 5 5 3 ()()(1) 8(4)3(3) 7 7 8 1 4 (
9、 )( ) 11(28)10(10) 7 8 5 1 (0.4)(600) (5)342 (1)1748 9 1 1 1 ()()0 7(4)3(3 5 2 9 1 7 1 ( )( ) 13(21)7(11) 7 6 6 1 6 ( )(60) (3)233 (1)1701 6 7 (14)(1) 14(2) 3(21.5) 1 1 ()() 53(143) (3)344 5 8 2813(30)(12) 8.8(6.9)(3.2)7.2 2 1 1 3 7 8 ()() 5.1()(9.7) 5 7 2 7 5 5 6 5 ()()(10) 14(1)3(4) 7 7 7 1 2 ( )( ) 1(11)7(18) 6 2 3 1 (0.2)(3) (4)452 (1)2781 6 1 1 1 ()()0 21(4)3(3 4 8 4 1 1 1 ( )( ) 13(14)2(16) 3 4 2 7 4 ( )(70) (1)413 (1)1714 6 5 (18)(19) 14(11) 4(13.5) 1 1 ()() 153(151) (4)452 3 5 364(30)(17) 5.9(8.1)(3.1)3.5 2 1 1 2 4 8 ()() 9.4()(5.1) 9 6 3 7 5 5
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