x.5=10.5
giúp mik nha
4.10-x:2=1
5.x:4+3*2=7
6.2:x+5=6
7.2*x*3*5=30
8.2*x:10*2=1
9.18:x-5*2=8
10.5*5-2:x=24
a) 10 - x : 2 = 1
x: 2 = 9
x = 18
b) x:4 + 3 x 2 = 7
x:4 + 6 = 7
x:4 = 1
x = 4
c) 2: x + 5 = 6
2: x = 1
x = 2
+4.10-x:2=1
40-x:2=1
x:2=40-1
x:2=39
x:2=19,5
+5.x:4+3*2=7
5.x:4+6=7
5.x:4=7-6=1
5.x=1.4=4
x=4:5
x=0,8
+6.2:x+5=6
12:x=6-5
12:x=1
x=12:1
x=12
+7.2*x*3*5=30
14.x.15=30
14.x=2
x=2:14
x=1/7
+8.2*x:10*2=1
16.x:20=1
16.x=20
x=20:16
x=1,25
9.18:x-5*2=8
10.5*5-2:x=24
d) 2 * x * 3 * 5 = 30
x * 30 = 30
x = 1
e) 2 * x : 10* 2 = 1
2*x * 1/10 * 2 = 1
2/5 * x = 1
x = 5/2
g) 18 : x - 5*2 = 8
18 : x - 10 = 8
18 : x = 18
x = 1
h) 5*5 -2 : x = 24
25 - 2:x = 24
2:x = 1
x = 2
1.ƯC (10;20) :
2.100.[10.5.(5^3+3^5)]
3.5.100+10-100
4.Tìm x
a)1000.(x+1000-1^3)=0
b)5000-x:10^3=0
1.Ta có:
Ư(10)={1;2;5;10}.
Ư(20)={1;2;4;5;10;20}.
=> Ư(10;20)={1;2;5;10}
Cái dấu ^ là gì rồi tôi giải tiếp cho
bài 4
a) 3. -5/11 b) 3/5+4/7.14/6 c) 10/21-3/8.4/15 d) ( 2/3 + 3/4 ) . ( 5/7 + 5/14 )
bài 5
a) x-1/2=3/10.5/6 b) x/5= -3/14. 7/3 c) x+2/3=9/15.5/27
`#` `\text{dkhanhqlv}`
`4)`
`a)3.(-5/11)`
`=-15/11`
`b)3/5+4/7 . 14/6`
`=3/5 + 4/3`
`=9/15+20/15`
`=29/15`
`c) 10/21-3/8 . 4/15`
`=10/21-1/10`
`=100/210-21/210`
`=79/100`
`d)(2/3+3/4)(5/7+5/14)`
`=(8/12+9/12)(10/14+5/14)`
`=17/12 . 15/14`
`=85/56`
`5)`
`a)x-1/2=3/10 . 5/6`
`=>x-1/2=1/4`
`=>x=1/4+1/2`
`=>x=1/4+2/4`
`=>x=3/4`
`b)x/5 = -3/14`
`=>x : 5 = -3/14`
`=>x=-3/14 . 5`
`=>x=-15/14`
`c)x+2/3=9/15 . 5/27`
`=>x+2/3=1/9`
`=>x=1/9-2/3`
`=>x=1/9-6/9`
`=>x=-5/9`
X-4.68=10.5
x - 4,68 = 10,5
x = 10,5 + 4,68
x = 15,18
45^10.5^20\5^75^15
\(=\dfrac{5^{10}\cdot3^{20}\cdot5^{20}}{\left(3\cdot5^2\right)^{15}}=\dfrac{5^{30}\cdot3^{20}}{5^{30}\cdot3^{15}}=3^5=243\)
y x 11 - y = 10.5
y x 11 - y = 10.5
y x ( 11 - 1 ) = 10.5
y x 10 = 10.5
y = 10.5 : 10
y = 1.05
giúp mik nha
tìm x:
4.10-x:2=1
5.x:4+3*2=7
6.2:x+5=6
7.2*x*3*5=30
8.2*x:10*2=1
9.18:x-5*2=8
10.5*5-2:x=24
nhớ làm thẳng cột nha.hihi
\(4) 10-x:2=1 \)
\(=> x:2=10-1\)
\(=> x:2=9\)
\(=> x=9.2\)
\(=> x=18\). Vậy \(x=18\)
\(5) x:4+3.2=7\)
\(=> x:4+6=7\)
\(=> x:4=7-6\)
\(=> x:4=1\)
\(=> x=4\). Vậy \(x=4\)
\(6) 2:x+5=6\)
\(=> 2:x=6-5\)
\(=> 2:x=1\)
\(=> x=2\).Vậy \(x=2\)
\(7) 2.x.3.5=30\)
\(=> 2x.15=30\)
\(=>2x=30:15\)
\(=> 2x=2\)
\(=> x=1\).Vậy \(x=1\)
\(8)2.x:10.2=1\)
\(=> 2x=1:2.10\)
\(=> 2x=5\)
\(=>x=5:2\)
\(=> x=\frac{5}{2}\).Vậy \(x=\frac{5}{2}\)
\(9)18:x-5.2=8\)
\(=> 18:x-10=8\)
\(=>18:x=8+10\)
\(=>18:x=18\)
\(=> x=1\).Vậy \(x=1\)
\(10)5.5-2:x=24\)
\(=>25-2:x=24\)
\(=> 2:x=25-24\)
\(=>2:x=1\)
\(=>x=2\).Vậy \(x=2\)
tính nhanh
10 .5 + 10.5 + 10.3
\(10\cdot5+10\cdot5+10\cdot3=10\cdot\left(5+5+3\right)=10\cdot13=130\)
10.5+10.5+10.3
=10. (5+5+3)
=10.13
= 130
k mình nha mình đầu tiên nè
10 . 5 + 10 . 5 + 10 . 3
= 10 . ( 5 + 5 + 3 )
= 10 . 13
= 130
Gạch chân lỗi sai trong các câu lệnh sau và sửa:
a) For i:=1.5 to 10.5 do writeln('A');
b) X:=10; while X:=10 do X:=X+5;
Lời giải:
{ } = lỗi sai
a) For i:={1.5 to 10.5} do writeln('A');
Sửa : for i:= 1 to 10 do writeln('A');
b) X:=10; while {X:=10} do X:=X+5;
Sửa : x:=10; while x=10 do x:=x+5;