BÀI TẬP BUỔI 3: TÌM X
Bài 1 : Tìm x:
a) (x-34).15=0
b) 18.(x-16)=18
c) (x-55).17=0
d) 25.(x-75)=25
e) 7.(2x+1)=21
f) 4.(3x-2)=16
Bài 2 Tìm x:
a) (x-34)-15=0
b) 18-(x-16)=18
c) (x-55)-17=0
d) 25-(x-75)=25
e) 7+(2x+1)=21
f) 4+(3x-2)=16
Bài 3: Tìm x:
a)
(x-3)-120=0
b)
156-(x+61)=82
c) 96-3(x+1)=42
d)
124+(118-x)=217
e) (x-25)-115=10+5
f) 541+(218-x)=735
g) 125+(145-x)=175
h) 435+(6x-8)=457
i) 96-3(x+1)=42
Bài 4: Tìm x:
a) 151-2(x-6)=2227:17
b) 12(x-1):3=64-8
c) 60-(x:6+4)=54
d) 25+25.x=64+36
e) 5x-36:18=13
f) (5x-36):18=13
g) 7+(2x+1)=21
h) 4+(3x-2)=16
i) 12x-33=9.27
Bài 5 Tìm x:
a) 1+2x=15
b) 13-4x=5
c) 2(x+1)-3=9
d)10-3(12-x)=1
e) 62-(2x-3):3=13
f) 71+(26-3x):2=13
g) 71+(26-3x):2=75
h) 25+68(5x+7)=29
i) 15:(4x-7)+28=4:(4x-7)+39
Bài 6: Tìm x
a) x+2x=15
b) 5x-4x=5
c) x+8x=9
d)
[(10-x).2+5]:3-2=3
e) 2<x<5
f) x<10
g)
3 9x
≤ ≤
h)
4 11x≤ ≤
i)
0 5x
≤ ≤
BÀI TẬP BUỔI 3: TÌM X
Bài 1 : Tìm x:
g) (x-34).15=0
h) 18.(x-16)=18
i) (x-55).17=0
j) 25.(x-75)=25
k) 7.(2x+1)=21
l) 4.(3x-2)=16
Bài 2 Tìm x:
g) (x-34)-15=0
h) 18-(x-16)=18
i) (x-55)-17=0
j) 25-(x-75)=25
k) 7+(2x+1)=21
l) 4+(3x-2)=16
Bài 3: Tìm x:
j) (x-3)-120=0
k)
156-(x+61)=82
l) 96-3(x+1)=42
m) 124+(118-x)=217
n) (x-25)-115=10+5
o) 541+(218-x)=735
p) 125+(145-x)=175
q) 435+(6x-8)=457
r) 96-3(x+1)=42
Bài 4: Tìm x:
j) 151-2(x-6)=2227:17
k) 12(x-1):3=64-8
l) 60-(x:6+4)=54
m) 25+25.x=64+36
n) 5x-36:18=13
o) (5x-36):18=13
p) 7+(2x+1)=21
q) 4+(3x-2)=16
r) 12x-33=9.27
Bài 5 Tìm x:
d) 1+2x=15
e) 13-4x=5
f) 2(x+1)-3=9
d)10-3(12-x)=1
e) 62-(2x-3):3=13
f) 71+(26-3x):2=13
g) 71+(26-3x):2=75
h) 25+68(5x+7)=29
i) 15:(4x-7)+28=4:(4x-7)+39
Bài 6: Tìm x
j) x+2x=15 m) [(10-x).2+5]:3-2=3 p)
3 9x
≤ ≤
k) 5x-4x=5
l) x+8x=9
n) 2<x<5
o) x<10
q)
4 11x≤ ≤
r)
0 5x
≤ ≤
BÀI KIỂM TRA SỐ 1
Hä vµ tªn häc sinh:................................
C©u 1 (4.5 ®iÓm) Thùc hiÖn c¸c phÐp tÝnh
a) 22.47 + 2.38.11 + 15.22
b) 80 - (4.25-7.8)
c) 23.75+25.23 +180
d) 80- (4.25 – 3.8)
e)
80- (4.25 – 3.8)
f) 2448: [119 – (23 -6)] + (51- 49)
g) [1570 – 4.(25.19 – 25. 9)] : [2. (27- 8)]
h) 2x17x16+36x21+8x4x62
i) 32x25+32x75+68x79+68x21
C©u 2 (4.5 ®iÓm)T×m x
a) x – 72 : 9 = 7.4 d) 231 – (x -6) = 1339 : 13
b). (x + 4) = 121 – 7.3 e) [(6.x - 39) : 3] .79 =395
c) (5x – 5 ).2 =60
C©u 3 (1 ®iÓm) TÝnh tæng:
a) A=1+2+3+4+...+100
b) B = 5 + 10 +15 +–. + 1995 + 2000 + 2005
BÀI KIỂM TRA SỐ 1
Hä vµ tªn häc sinh:................................
C©u 1 (4.5 ®iÓm) Thùc hiÖn c¸c phÐp tÝnh
a) 22.47 + 2.38.11 + 15.22
b) 80 - (4.25-7.8)
c) 23.75+25.23 +180
d) 80- (4.25 – 3.8)
e) 80- (4.25 – 3.8)
f) 2448: [119 – (23 -6)] + (51- 49)
g)
[1570 – 4.(25.19 – 25. 9)] : [2. (27- 8)]
h) 2x17x16+36x21+8x4x62
i) 32x25+32x75+68x79+68x21
C©u 2 (4.5 ®iÓm)T×m x
a) x – 72 : 9 = 7.4 d) 231 – (x -6) = 1339 : 13
b). (x + 4) = 121 – 7.3 e) [(6.x - 39) : 3] .79 =395
c) (5x – 5 ).2 =60
C©u 3 (1 ®iÓm) TÝnh tæng:
a) A=1+2+3+4+...+100
b) B = 5 + 10 +15 +–. + 1995 + 2000 + 2005
BÀI KIỂM TRA SỐ 1
Hä vµ tªn häc sinh:................................
C©u 1 (4.5 ®iÓm) Thùc hiÖn c¸c phÐp tÝnh
a) 22.47 + 2.38.11 + 15.22
b) 80 - (4.25-7.8)
c) 23.75+25.23 +180
d) 80- (4.25 – 3.8)
e) 80- (4.25 – 3.8)
f) 2448: [119 – (23 -6)] + (51- 49)
g) [1570 – 4.(25.19 – 25. 9)] : [2. (27- 8)]
h) 2x17x16+36x21+8x4x62
i) 32x25+32x75+68x79+68x21
C©u 2 (4.5 ®iÓm)T×m x
a) x – 72 : 9 = 7.4 d) 231 – (x -6) = 1339 : 13
b). (x + 4) = 121 – 7.3 e) [(6.x - 39) : 3] .79 =395
c) (5x – 5 ).2 =60
C©u 3 (1 ®iÓm) TÝnh tæng:
T
hêi gian :
45–
T
hêi gian :
45–
T
hêi gian :
45–
a) A=1+2+3+4+...+100
b) B = 5 + 10 +15 +–. + 1995 + 2000 + 2005