五年级奥数解方程资料带答案
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五年级解简易方程专题练习
(1)3.4x -9.8=1.4x +9 (2)2x +1=25-8x
(3)5(x +2)=2(2x +7) (4)6(2x -7)=5(x +7)
(5)5(3x -1.4)=2(6x -0.5) (6)6-0.6(x -0.6)=0.6
(7)(3x +2)÷4=2x -7 (8)(4x +14)÷(x +2)=5
(9) 2x -
0.3
x +0.4 (10) x +2 2x -1
0.5 0.3 3 4
(11)8:12=x :45
五年级解简易方程答案
(1)3.4x -9.8=1.4x +9 (2)2x +1=25-8x
解: 2x =18.8 解:10x =24 x =18.8÷2 x =24÷10 x =9.4 x =2.4
(3)5(x +2)=2(2x +7) (4)6(2x -7)=5(x +7)
解:5x +10=4x +14 解:12x -42=5x +35
x =4 7x =77
x =11
(5)5(3x -1.4)=2(6x -0.5) (6)6-0.6(x -0.6)=0.6
解:15x -7=12x -1 解:6-0.6x +0.36=0.6
3x = 6 5.76=0.6x
x =2 x =9.6
(7)(3x +2)÷4=2x -7 (8)(4x +14)÷(x +2)=5
解:3x +2=(2x -7)×4 解:4x +14=5×(x +2)
3x = 8x -28 4x +14=5x +10
30=5x x =4 x =6
(9) 2x -
0.3
x +
0.4 (10) x +2 2x -1
0.5 0.3 3 4
解:(2-0.3)×0.3=0.5×(x +0.4) 解:3(2x -1)=4(x +2) 0.6x -0.09=0.5x +0.2 6x -3=4x +8 0.1x =0.29 2x =11 x =2.9 x =5.5
(11)8:12=x :45 解: 12x =8×45 12x =360 x =30