五年级上册解方程计算专项练习(最新整理)

解：x 5 5 7 5
3x 5 4
x 75
3x 9
x2
x 93
x3
如果把画框的部分省略，我们把一个数从等号的左边移到右边的过程，叫做
移项，
注意把一个数从方程的左边移到右边时，原来是加的变成减，原来是减的变
成加号。
练习
2x 5 5
4x 6 12
25%x 5 1 7 63
4x 6 3x 5
3x 3 x 5
7x 6 3 x 5
1. a(b c)
2. a (b c)
a (b c)
3. a (b c)
a (b c)
应用上面的性质去掉下面各个式子的括号，能进行运算的药进行运算
3(x 3)
1 (6 2 x) 23
12 (3 2x)
5 (1 x 2) 66 3
不含未知数的移到方程右边）
4.合并；（就是进行运算了）5.化未知数的系数为 1
6.检验；（把求出来的 x 的值代入方程的左
右两边进行运算，看左边是否等于右边）
1 (4 3 x) 1 (2 1 x) 2 4234
2x 5 13
3(x 2) 12
4 x 5 51 323
6x 5x 7
4x 3 3x 4 14
1 x 0.2x 1 x 4
2
4
7(2x 1) 3(4x 1) 5(3x 2) 1
3(x 7) 2[9 4(2 x)] 22
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9 (1 x 3) 36 34
(2x 5) (3x 6) 2
3( y 1) 12
1 (5 3x) 1 (3 4x)
2
3
4(x 0.5) x 7
3 6(x 2) 1 3
1 (2x 3) 1 (5x 1) 1
3
6
3 [2(x 1) 2] 2x
2
23
3 x 2.8 x 0.7 2
2.典型的例子及解方程的一般步骤；
7 3x 1 解：7 1 3x 1 3x 7 3x 7 1 3x 6 x2
7 x 14 解：7 14x 14x 7
x 7 14 x 0.5
(3x 5) (2x 3) 2 解：3x 5 2(2x 3) 3x 5 4x 6 5 6 4x 3x x 11
小升初数学专题之解方程
一.字母的运算 x 2x
2x 1 x 3
3 x 35%x 4
75%x 0.5x
3a 2.5a
25%x 33%x
3x 4t 5x
3t 4x 2t
6x 2 t 7 x t 32
二.去括号（主要是运用乘法的分配律和加减法的运算性质）
6x 5x
5 (x 3)
7 2(x 1)
3 x 1 ( 3 x 1) 8 42
6x 3(2x 1 x) 3
1 (3x 4) 1 (2x 6)
2
3
1 (8x 5) 1 (2x 1)
4
22
解方程
1.运用等式的性质解简单的方程，
3x 4 5
x57
解：3x 4 4 5 4
练习 17 5x 7
21 3x 7
3 3 8 4x 20 4
(11x 5) (3x 1) 3
3.解方程的一般步骤：
1 (x 3) 1 (x 5) 7 1 x
2
3
66
解：3(x 3) 2(x 5) 6 (7 1 x) 66
3(x 3) 2(x 5) 7 x
8x 9x 6
4x 3 2x 3
50%x 25%x 25 15%x 25% 1.25
33%x 25%x 3 4
0.01x 7 8
x7 3 x 10
7x1 1x1 9 33 4
461x 3 355 5
7 10x 9 15 6x
9 x 36
9 (x 3) 36 4
3x 9 2x 10 7 x
3x 2x x 7 9 10
4x 6
x 64
x 3 2
【方程强化训练题】
1 (3x 5) 2 (4x 7) 3 5 x
2
3
26
1.去分母；（应用等式的性质，等号的两边
同
时乘以公分母）
2.去括号；（运用乘法的分配律及加减法运
算律）
3.移项；（把含有未知数的移到方程左边，