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分数加减混合运算习题.doc

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1、 - = - + + = =710 15 13 524 57 514 23 14 654- + + + 2 = 1 - = 59 25 14 15 58 13 45 27 = = = = =72601 = = = 1 = =975131295374 = = = = =834538215 = = = = =4718374615876 = = = = =9262037391315 = = 7 = + = =61475155814+ = 3 43 4387 925 731 615 15 132 = 5 = 78 12 14 13 45 23 14 8 5- = 1- - =56 49 710 15

2、35 14 15+ = + = 2 + = 0.25= = 512 712 78 18 49 3372+ = + = + = + = - = 89 16 34 516 16 15 145160.74+ = 0.375+ 52232738 1 361313261312413513216375+ = 5951079335 15932128651282776443404131 = = + = = =35 79 29 78 18 5412+ = 1 = + = - = = 07432639751 = + + 1 = 1253254311322 14- = + = + = + = 710 310 25

3、35 57 514 34 17 58531253147+ = = 1029513687156 1 72858231 5= 5 =521437430.32= 12.58= 80.4 2.54= 7-6.38 360.9 = 50.001 = 1360 = 0.80.02 = 0.36+1.54 1355 0.62= 4.80.6= 1.7+3= 0.73.5= 1.2516= 9.632= 20.09= 26.2626= 4.576.43= 50.001= 2.54= 0.48120 1.0199 4.3-1.6= 0.97= 0.6+7= 0.220.5 1.258= 0.9100= 0.64

4、16= 10-9.12= 0.8125= 3.21.78 四、计算下面各题,能简算的要简算。8.50.241.76 7.9117.9 3.143 2 7.5(2.53.8) 51.4 - 0.45 0.8125-10 10-4.8-3.2 7.81.177.80.17 2.651.7+1.351.7 2.72-0.45 0.25101 3.2527+733.25 38.7-7.841.4 8.8-2.51.8 490.251.250.253.2 788.5220.5 15-512- 712+ - = - + =52103361415 35 45 78 29 18+ - + ) 0.25+ +

5、+ + 10 - 58 45 38 15 1115 34 415 715 1921 221 712 512 ( ) 8712563452107541943685( ) ( ) 6( )9543210835253124352- ( + ) + + 5481837456175612- + 25 - - + - - ( - ) 1315 16 56 512 718 23 16 512 72815 + + +( )9456 34 13 56 49 59 12 23 14415212783 51974231652752)2185()2143(9)4152(09( ) ( )321452317618313

6、92612 + + 1 615516424)5231(1 = = + + + + =45 15 23 45 13 5431154 ( ) 3 - - - 413279813751858714 13 34 1 45 14 13 910 320 315 712 34 2728 1314 572 15 5 7 1 3 1 1.8750.25 56 23 712 14 12 56 56 13 12 23 = = = =201739283514534131 = 4 3256 27 16 58 23 56 45 15( ) 2- - - 0.8+ +0.2 45 12 14 34 27 14 27 14

7、13 34 58( ) ( ) 2 12521548317342146 8531215839512748743123( - ) 6( ) 1921 914 43526152352314.8+ +1.2 3152415403)4183(149+ + + + 1285397812315616+ 71924125.048751698371+ -( - ) + -( + ) + - + 23 45 45 15 715 1115 310 1115 154972 34 27 14 27 318532956142 + + + 1367285123711 15 411 25+ + + 165756 52107

8、3 57 9( ) ( )83261507612)127953(49810)10735.(28)412.3(804)625.03(8715827 1583945298614312561 + + + - 6831351357923 49 5749( ) ( ) ( )9832187125634521024385 ( ) 3( + ) ( )943214914 67 910 34 162 = 16575)52( ( ) ( ) 54103214386521345 310 1510( ) 23 12 45 16 13 95104+ + = ( + )( ) 32512017320172425 413

9、 513 413 3175315.0311285 12743( )+ ( )541072396132解方程2x+ 4.625 + x = 58 14 1112 2095 8743xX = X + = 395 35 710 538712783x x = x + = = 72134 1112 7346.9804xX= + + x = x +( + )=2 8743x312717 12 23 13 34x+0.75- 0.15 x16 = 35 0.5+4.5x=45.5 35 972xX4.5 = 20 5x3x= 3.2 5.5X-3X15 X = 2X =1- 3x29 =19 2.7X1.6 = 38.9 317251x = 12547274x651x5218 x - = = 316 58 7231x1)543(x3212 14X 4x - =2- 89.122.9 3x142 11 316513 138X0.755=0.25 3.8x-0.8x=27 -x 56 12 6512x8316x6598xx= x - x= 4165 972434 310 1316 38X 326x = 4.2 43611854x413x

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