小升初解方程
小升初解方程
练习一
(1) 3.5X+1.8=12.3 (5) X+2421X =21 (6) X +X =
(7) 3.6X÷2=2.16
(3) 5X÷2=10 6
(10) X-235=10 (13) 710
X =
1425
(16) 180+6X =330
(19) 15X÷2=60
5 (8) X+23
7X =4 (4) X-0.25X =3 (11) 2X+7X =910 (14) 132X =4 (17) 2.2X-1=10 (20) 4X+X =3.15 552
(2) 0.8X-4=1.6 (9) X-25X =3
10
(12) 38+X =2
5
(15) 5
9
X =10 (18) X-0.8X =10 21)3.4X +1.8=8.6
(
22) 5X-X =2.4 (23) 1.5X-X =1 (24) 6.6X-6X =1.8
练习二
1、12-3(9-x)=5(x-4)-7(7-x); 4、2(x-1)=4.
7、2(6x-2)=8
10、56=12x+8
13、13x -12(x+2)=0 (x-1)
2、6x-17=13 5、13x-26=13 8、25x (12-6)=300 11、2x+4=30 14、67-12x=7 3、9-10x=10-9x 6、75-5x=70 9、24x+12=132 12、12x=11x-79 、(x-1)-(3x+2)= - 15
16、 18x-16x+18×1+50=70 17、14×(60-x )×2=20x 18、4x+9(x+2)=200
19、100(x+1)+10x+(3x-2)+100(3x-2)+10x+(x+1)=1171
20、5x+4.5(103-x )=486
练习三
(1)2x+8=16
(4)9x-3x=6
(7)x-8=6x
(2)x/5=10 (5)6x-8=4 (8)4/5x=20 (3)x+7x=8 (6)5x+x=9 (9)2x-6=12
(10)7x+7=14 (11)6x-6=0 (12)5x+6=11
(13)2x-8=10 (14)1/2x-8=4 (15)x-5/6=7
(16)3x+7=28
(19)24x+x=50
(31)6x+6=12
(34)2x+16=19
(17)3x-7=26 (20)6/7x-8=4 (32)3x-3=1 (35)5x+8=19 (18)9x-x=16 (30)3x-8=30 (33)5x-3x=4 (36)14-6x=8
(37)15+6x=27
(40)9-2x=1
(43)8x+9=17
(46)2x+9=17
(49)7x-9=8
(52)x-30=12
(55)9x=18
(38)5-8x=4 (41)4+5x=9 (44)9+6x=14 (47)8-4x=6 (50)x-56=1 (53)6x-21=21 (56)4x-18=13 (39)7x+8=15
(42)10-x=8
(45)x+9x=4+7 (48)6x-7=12
(51)8-7x=1
(54)6x-3=6
(57)5x+9=11
(58)6-2x=11
(61)X-5.7=2.15 (63)3.5×2= 4.2 x
(66)9.25-X=0.403
(69)x+13=33
(72)6.7x -60.3=6.7
(59)x+4+8=23 (62)15.5X-2X=18 (64)26×1.5= 2x
(67)16.9÷X=0. 3 (70)3 - 5x =80 (73)9 +4x =40 (60)7x-12=8
(62)3X 0.7=5
(65)0.5×16―16×0.2=4x
(68)X÷0.5=2.6
(71)1.8- 6x=54
(74)0.2x-0.4+0.5=3.7
(75)9.4x-0.4x =16.2
(78)12 x+34 x=1
(81)12 +34 x=56
(84)x +14 x= 65
(76)12 -4x =20
(79)18x-14 x= 12
(82)22-14 x= 12
(85)23 x=14 x +14 (77)1/3 x+5/6 x=1.4
(80)23 x-5×14 = 14
(83)23 x-14 x= 14
(86)30 x-12 x -14 x=1