分数加减混合运算习题(5页).doc
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1、-分数加减混合运算习题-第 5 页 - = - + + = =- + + + 2 = 1 - = = = = 1 = = = 7= += = = 5= 5- = 1-=+ = + = 2 + = 0.25= = + = + = + = += -= 0.74+ = 0.375+ 1 + = 1= = + = = = + = 1 = + = - = = = + + 1= - = + = + = + = 1 5= 5=2=8= 80.4 4= 7-6.38 360.9 = 50.001 = 130.02 = 0.36+1.54 1355 3.5= 26= 4.576.43= 54= 99 4.3-1
2、.6= 7= 0.6+7= 0.5 8=100= 125= 3.21.78 四、计算下面各题,能简算的要简算。32 7.5(2.53.8) 55 125-10 10-4.8-3.2 0.17 1.7 101 27+733.25 1.4 1.8 493.2 788.5220.5 15-512- + - = - + =+ - + ) 0.25+ + + + 10 - () () 6() - + 25 - - + - - ( - ) 5 + + +() 2 + 1 1= = + + += () 3 - - - 1 2 1557 131 1.8750.251= 4() 2- - 0.8+0.2 ( )
3、 () 2 3(- ) 6() 4.8+ + -(- ) + -(+ ) + - + + + + + 1 + + +- 5 () 3(+ ) () 2= () () 10() + + = (+)() 解方程 2x+4.625 + x = X= X + = x = x + = = X= + + x = x +( + )=2 x+0.75- 0.15 x16 = 35 0.5+4.5x=45.5 X4.5 = 20 5x3x= 3.2 5.5X-3X15 X= 2X=1- 3x29 =19X1.6 = 38.9 x = x - = = X 4x - =2- 89.122.9 3x142 11 8X5=0.25 3.8x-0.8x=27 -x x= x - x= X 326x = 4.2
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