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五年级方程练习题

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1. 解方程:

(1) 0.5 + x = 9.8 ÷ 2

(2) 2(x + x + 0.5) = 9.8

(3) 25000 + x = 6x

(4) 3200 = 440 + 5x + x

2. 填空:

(1) 使方程左右两边相等的___,叫做方程。

(2) 被减数 = 差()减数, 除数 = ()○()。

(3) 求__的过程叫做解方程。

(4) 小明买5支钢笔,每支a元;买4支铅笔,每支b元。一共付出()元。

3. 判断题:

(1) 含有未知数的式子叫做方程。()

(2) 4x + 5、6x = 8都是方程。()

(3) 18x = 6的解是x。()

4. 解方程:

(1) x - 0.8x = 6

(2) 12x - 8x = 4.8

(3) 7.5 + 2x = 15

(4) 1.2x = 81.6

(5) x + 5.6 = 9.4

(6) x - 0.7x = 3.6

(7) 91 ÷ x = 1.3

(8) x + 8.3 = 10.7

(9) 15x = 3

(10) 3x - 8 = 16

(11) 3x + 9 = 27

(12) 18(x - 2) = 270

(13) 12x = 300 - 4x

(14) 7x + 5.3 = 7.4

(15) 3x ÷ 5 = 4.8

(16) 0.5x + 8 = 43

(17) 139.25 - X = 0.403

(18) 18.9 ÷ x = 0.3

(19) 23x = 14x + 27

(20) x + 14x = 75

(21) 95 - 5x = 80

(22) 6x - 3x = 18

(23) 7(6.5 + x) = 87.5

(24) 0.273 ÷ x = 0.35

(25) 1.8x = 0.972

(26) x ÷ 0.756 = 90

(27) 0.1(x + 6) = 3.3 × 0.4

(28) (27.5 - 3.5) ÷ x = 4

(29) 9x - 40 = 5

(30) x ÷ 5 + 9 = 21

(31) 48 - 27 + 5x = 31

(32) 10.5 + x + 21 = 56

(33) x + 2x + 18 = 78

(34) (200 - x) ÷ 5 = 30

(35) (x - 140) ÷ 70 = 4

(36) 20 - 9x = 2

(37) x + 19.8 = 25.8

(38) 5.6x = 33.6

(39) 9.8 - x = 3.8

(40) 75.6 ÷ x = 12.6

(41) 5x + 12.5 = 32.3

(42) 5(x + 8) = 102

(43) x + 3x + 10 = 70

(44) 3(x + 3) = 50 - x + 3

(45) 5x + 15 = 60

(46) 3.5 - 5x = 2

(47) 0.3 × 7 + 4x = 12.5

(48) x ÷

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