小數(shù)分?jǐn)?shù)四則混合運(yùn)算30題

1、(1) 3/7 X49/9-4/3(1)5/7 X3/25+3/7(2) 8/9 X15/36+1/27(2)3/14 XX2/3+1/6(3) 12 X5/6 72/9 X3(3)1/5 X2/3+5/6(4) 8 X5/4+1/4(4)9/22+1/11-1/2(5) 6 -3/8 -18 -H3(5)5/3 X11/5+4/3(6) 4/7 X5/9+3/7 X5/9(6)45 X2/3+1/3 X15(7) 5/2- (3/2+4/5 )(7)7/19+12/19 X5/6(8) 7/8+(1/8+1/9 )(8)1/4+3/4 -2/3(9) 9 X5/6+5/6(9)8/7 X21

2、/16+1/2(10) 3/4 X8/9-1/3(10)101 X1/5 -1/5 X21(1) 7 X5/49+3/14(1)(6.8-6.8 X0.55) -8.5(2) 6 X(1/2+2/3 )(2)0.12 X4.8 ).12 X4.8(3) 8 X4/5+8 X11/5(3)(3.2 X1.5+2.5 )-1.6(4) 31 X5/6 6(4)6-1.6 -4(5) 9/7- (2/7 -0/21 )(5)38+7.85-5.37=(6) 5/9 X18 -4 X2/7(6)7.2 T.8-1.2 X5(7) 4/5 X25/16+2/3 X3/4(7)6-1.19 X3-0.43

3、=(8) 14 X8/7 七/6 X12/15(8)6.5 X(4.8-1.2 X4)(9) 17/32 -<3/4 X9/24(9)0.68 X1.9+0.32 X1.9(10) 3 X2/9+1/3(10) 10.15-10.75 X0.4-5.7(1)5.8 X(3.87-0.13 ) +4.2 X3.74(1)(3.2 X1.5+2.5 )-1.6(2)32.52- (6+9.728 -3.2 ) X2.5(2)6-1.6 -4(3)(7.1-5.6 )X0.9-1.15 -2.5(3)7.2 T.8-1.2 X5(4)5.4 F2.6 X(3.7-2.9 ) +0.62(4)6

4、.5 X(4.8-1.2 X4)(5)12 X6 -(12-7.2 ) -6(5)5.8 X(3.87-0.13 ) +4.2X3.74(6)2/3 -1/2 1/4 X2/5(6)32.52- (6+9.728 -3.2)X2.5(7)2 6/13 十9/26 2/3(7)(7.1-5.6 )X0.9-1.15-2.5(8)2/9 + 1/2 -4/5 + 3/8(8)5.4 -2.6 X(3.7-2.9 ) +0.62(9)10 十5/9 + 1/6 X4(9)12 X6 -(12-7.2 ) -6(10) 1/2 X2/5 + 9/10 十9/20(10：)12 X6 -7.2-6(1)

5、5/9 X3/10 + 2/7 -2/5(1)0.68 X1.9+0.32 X1.9(2 )1/2 + 1/4 X4/5 1/8(2)(58+370 ) -(64-45 )(3 )3/4 X5/7 X4/3 1/2(3)420+580-64 X21 -28(4 )23 8/9 X1/27 -1/27(4)(136+64 ) X(65-345(5 )8 X5/6 + 2/5 -4(5)48.10.15-10.75 X0.4-5.7(6 )1/2 + 3/4 X5/12 X4/5(6)(23/4-3/4)*(3*6+2)(7 )8/9 X3/4 3/8 -3/4(7)3/7 X49/9-4/3(8

6、 )5/8 十5/4 + 3/23 寧9/11(8)8/9 X15/36+1/27(9 )(6.8-6.8 X0.55) -8.5(9)12 X5/6 -2/9 X3(10) 0.12 X4.8 -).12 X4.8(10)8 X5/4+1/4-23)(1) 6 十3/8 43/8 -H3(1) 5/3 X11/5+4/3(2) 4/7 X5/9+3/7 X5/9(2) 45 X2/3+1/3 X15(3) 5/2- (3/2+4/5 )(3) 7/19+12/19 X5/6(4) 7/8+(1/8+1/9 )(4) 1/4+3/4 -2/3(5) 9 X5/6+5/6(5) 8/7 X21/

7、16+1/2(6) 3/4 X8/9-1/3(6) 101 X1/5 -1/5 X21(7) 7 X5/49+3/14(7) (6.8-6.8 X0.55) -8.5(8) 6X(1/2+2/3 )(8) 0.12 X4.8 ).12 X4.8(9) 8 X4/5+8 X11/5(9)( 3.2 X1.5+2.5 )-1.6(10) 31 X5/6 -5/6(10) 6-1.6 -4(1) 9/7- (2/7 40/21 )(1 ) 38+7.85-5.37(2) 5/9 X18 44 X2/7(2) 7.2T.8-1.2 X5(3) 4/5 X25/16+2/3 X3/4(3) 6-1.19

8、 X3-0.43(4) 14 X8/7 七/6 X12/15(4) 6.5X(4.8-1.2 X4)(5) 17/32 H3/4 X9/24(5) 5.8X(3.87-0.13 ) +4.2 X3.74(6) 3 X2/9+1/3(6) 32.52- (6+9.728 -3.2) X2.5(7) 5/7 X3/25+3/7(7) (7.1-5.6 ) X0.9-1.15 -2.5(8) 3/14 XX/3+1/6(8) 5.4-2.6 X(3.7-2.9 ) +0.62(9) 1/5 X2/3+5/6(9) 12 X6 -(12-7.2 ) -6(10) 9/22+1/11-1/2(10) 1

9、2 X6-7.2-6(1) 0.68 X1.9+0.32 X1.9(1) 4*3/5+3/4*2/5(2) 58+370 )十(64-45 )(2) 1-1/4+8/9/7/9(3) 420+580-64 X21 -28(3) 1/6 -3/24+2/21(4) 136+6 X(65-345 -23)(4) 15*3/5(5) 10.75 X0.4-5.7(5) 3/4 T/10-1/6(6) 18.1 +( 3 0.299 -0.23 )X1(6) 1/3+1/2)廿/6-1/3 -1/7(7) (6.8-6.8 X0.55)十8.5(7) 5%+.3/7 X49/9-4/3(8) 0.12

10、 X4.8 ).12 X4.8(8) 9X15/36+1/27(9)( 3.2 X1.5+2.5 )-1.6(9) 2X5/6 9 X3(10) 3.2 X6+ (1.5+2.5 )-1.6(10) 3 X5/4+1/4(1) 0.68 X1.9+0.32 X1.9(1) 94 -3/8 -3/8 北(2) 10.15-10.75 X0.4-5.7(2) 95/7 X5/9+3/7 X5/9(3) 5.8 X(3.87-0.13 ) +4.2 X3.74(3) 6/2- (3/2+4/5 )(4) 32.52- (6+9.728 -3.2 ) X2.5(4) 8+ (1/8+1/9 )(5)

11、(7.1-5.6 )X0.9-1.15 -2.5(5) 8 X5/6+5/6(6) 5.4 F2.6 X(3.7-2.9 ) +0.62(6) 1/4 X8/9-1/3(7) 12 X6 -(12-7.2 ) -6(7) 10 X5/49+3/14(8) 12 X6-7.2-6(8) 1.5X(1/2+2/3 )(9) 33.02 ( 148.4 90.85 )-2.5(9) 2/9X4/5+8 X11/5(10) (25%-695%-12%)*36(10) 3.1 X5/6 -5/64/7- (2/7 -0/21 )(1)12.5 X7.4 X0.819 X18 -4 X2/79.9 X6.

12、4- (2.5+0.24 )5 X25/16+2/3 X3/46.5 X9.5+6.5 X0.54 X8/7 -)/6 X12/150.35 X1.6+0.35 X3.47/32 -/4 X9/24(5)0.25 X8.6 X46.72-3.28-1.722/3 -1/2 1/4 X2/52 6/13 十9/26 2/3(7)0.45+6.37+4.552/9 + 1/2 -4/5 + 3/85.4+6.9 X3- (25-2.5 )10 十5/9 + 1/6 X42X41846-620-380(10) 4.8 X46+4.8 X54(10) 1/2 X2/5 + 9/10 十9/205/9

13、X3/10 + 2/7 -2/5(1)0.8+0.8 X2.51/2 + 1/4 X4/5 1/81.25 X3.6 X8 X2.5-12.5 X2.43/4 X5/7 X4/3 1/228 X12.5-12.5 X2023 8/9 X1/27 -1/2723.65- (3.07+3.65 )8 X5/6 + 2/5 -4(5)(4+0.4 X0.25 ) 8 X7 X1.251/2 + 3/4 X5/12 X4/51.65 X99+1.658/9 X3/4 3/8 -3/4(7)27.85- ( 7.85+3.4 )5/8 十5/4 + 3/23 *9/1148 X1.25+50 X1.25

14、 X0.2 X87.8 X9.9+0.781.2 X2.5+0.8 X2.5(10) 8.9 X1.25-0.9 X1.25(10) 5.15 X7/8+6.1-0.60625(1) 3/7 X49/9-4/3(1) 5/7 X3/25+3/7(2) 8/9 X15/36+1/27(2) 3/14 XX2/3+1/6(3) 12 X5/6 29 X3(3) 1/5 X2/3+5/6(4) 8 X5/4+1/4(4) 9/22+1/11-1/2(5) 6 十3/8 -18 -H3(5) 5/3 X11/5+4/3(6) 4/7 X5/9+3/7 X5/9(6) 45 X2/3+1/3 X15(7

15、) 5/2- (3/2+4/5 )(7) 7/19+12/19 X5/6(8) 7/8+(1/8+1/9 )(8) 1/4+3/4 -2/3(9) 9 X5/6+5/6(9) 8/7 X21/16+1/2(10) 3/4 X8/9-1/3(10) 101 X1/5 -1/5 X21(1) 7 X5/49+3/14(1) (6.8-6.8 X0.55) -8.5(2) 6X(1/2+2/3 )(2) 0.12 X4.8 ).12 X4.8(3) 8 X4/5+8 X11/5(3)( 3.2 X1.5+2.5 ) -1.6 (2)(4) 31 X5/6 6(4) 6-1.6 -4(5) 9/7-

16、(2/7 -0/21 )(5) 7.2T.8-1.2 X5(6) 5/9 X18 -4 X2/7(6) 6.5X(4.8-1.2 X4)(7) 4/5 X25/16+2/3 X3/4(7) 10.15-10.75 X0.4-5.7(8) 14 X8/7 七/6 X12/15(8) 5.8X(3.87-0.13 ) +4.2 X3.74(9) 17/32 -<3/4 X9/24(9) 32.52- (6+9.728 -3.2) X2.5(10) 3 X2/9+1/3(10) (7.1-5.6 ) X0.9-1.15 -2.5(1)0.12 X4.8 ).12 X4.8(1)1/4 + 3/

17、4-2/3(2 )(3.2 X1.5+2.5 ) -1.6(2)8/7X21/16 + 1/2(3 )3.2 X(1.5+2.5 ) -1.6(3)101X1/5 1/5 - X 21(4 )6-1.6 -4(4)3/7X49/94/3(5 )5.38+7.85-5.37(5)8/9X15/36 + 1/27(6 )7.2 -).8-1.2 X5(6)12 X5/6 2/9- X3(7 )6-1.19 X3-0.43(7)6 -3/83/8- -6(8 )6.5 X(4.8-1.2 X4)(8)4/7X5/9 + 3/7(9 )0.68 X1.9+0.32 X1.9(9)5/2 -(3/2 +

18、 4/5)(10) 10.15-10.75 X0.4-5.7(10)8 X5/4 + 1/4X 5/9(1)5.4 F2.6 X(3.7-2.9 ) +0.62(1)2/3 X5/7(2)12 X6 十(12-7.2 ) -6(2)1/3 -1/2(3)12 X6 十7.2-6(3)3/4 X2(4)102 X4.5(4)2-5/6(5)7.8 X6.9 + 2.2 X6.9(5)1/4 1/5(6)5.6 X0.25(6)2 5/6(7)8 X(20 1.25)(7)3/4 -1/3(8)1+5/6-19/12(8)1/2+1/4(9)1.18.1 +(3 0.299 十0.23 ) X1(9)45 X 2/3 +(10：)(6.8-6.8 X0.55) -8.5(10)7/19 + 12/191/3X 15X 5/6(1)7/8 +(1/8 + 1/9)(1)1/4 + 3/4-2/3(2)9 X5/6 + 5/6(2)8/7 X 21/16 + 1/2(3)3/4X 8-91/3(3)101 X 1/5 1/5 -X21(4)7 X5/49 + 3/14(4)38.95 -64-45 )(5)6 X(1/2 + 2/3)(5)(6.8-