DT
4
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Các câu hỏi dưới đây có thể giống với câu hỏi trên
TN
8 tháng 3 2019
a) y + 3/7 x 21/9 = 5
y + 3/7 x 7/3 = 5
y + 1 = 5
y = 4
b) y x 3/5 - 1/2 = 4/5
y x 3/5 = 4/5 + 1/2
y x 3/5 = 13/10
y = 13/6
c) 9/8 - y + 2/5 = 1/4
y - 2/5 = 9 /8 - 1/4
y - 2/5 = 7/8
y = 51/40
d) y - 6/5 : 2/3 = 5/6
y - 9/5 = 5/6
y = 79/30
e) y : 7/8 + 3/4 = 7/4
y : 7/8 = 1
y = 7/8
TG
4 tháng 3 2021
a) \(\dfrac{1}{2}+x=\dfrac{5}{6}\)
\(\Rightarrow x=\dfrac{5}{6}-\dfrac{1}{2}=\dfrac{5}{6}-\dfrac{3}{6}=\dfrac{2}{6}=\dfrac{1}{3}\)
b) \(x+\dfrac{1}{4}=\dfrac{3}{4}\)
\(\Rightarrow x=\dfrac{3}{4}-\dfrac{1}{4}=\dfrac{2}{4}=\dfrac{1}{2}\)
c) \(x-\dfrac{1}{5}=\dfrac{3}{10}\)
\(\Rightarrow x=\dfrac{3}{10}+\dfrac{1}{5}=\dfrac{3}{10}+\dfrac{2}{10}=\dfrac{5}{10}=\dfrac{1}{2}\)
d) \(\dfrac{5}{6}-x=\dfrac{1}{3}\)
\(\Rightarrow x=\dfrac{5}{6}-\dfrac{1}{3}=\dfrac{5}{6}-\dfrac{2}{6}=\dfrac{3}{6}=\dfrac{1}{2}\)
e) \(\dfrac{3}{10}+x=\dfrac{1}{2}\)
\(\Rightarrow x=\dfrac{1}{2}-\dfrac{3}{10}=\dfrac{5}{10}-\dfrac{3}{10}=\dfrac{2}{10}=\dfrac{1}{5}\)
g) \(x+\dfrac{1}{4}=\dfrac{3}{8}\)
\(\Rightarrow x=\dfrac{3}{8}-\dfrac{1}{4}=\dfrac{3}{8}-\dfrac{2}{8}=\dfrac{1}{8}\)
TP
4 tháng 3 2021
a) 12+x=5612+x=56
⇒x=56−12=56−36=26=13⇒x=56−12=56−36=26=13
b) x+14=34x+14=34
⇒x=34−14=24=12⇒x=34−14=24=12
c) x−15=310x−15=310
⇒x=310+15=310+210=510=12⇒x=310+15=310+210=510=12
d) 56−x=1356−x=13
⇒x=56−13=56−26=36=12⇒x=56−13=56−26=36=12
e) 310+x=12310+x=12
⇒x=12−310=510−310=210=15⇒x=12−310=510−310=210=15
g) x+14=38x+14=38
⇒x=38−14=38−28=18⇒x=38−14=38−28=18
Đọc tiếp
25 tháng 8 2021
a) X=3/18
b)X=13/10
c)X=11/15
d)X=8/35
e)X=37/21
f)X=65/36
g)X=1/4
h)X=5/4
i)X=7/5
k)X=5/14
l)X=167/96
có nhiều bài khó nếu em ko bik thì kb với cj để cj giúp nha.
25 tháng 8 2021
a)3/8
b) 13/10
c) 11/15
d) 8/35
e) 37/21
f) 65/36
g) 1/4
h) 5/4
i) 7/5
k) 5/14
l) 167/96
-HT- :)))))))
KP
20 tháng 4 2017
a,Cách 1: (6/11 + 5/11 ) x 3/7 Cách 2 :(6/11 + 5/11) x 3/7
= 1 x 3/7 =6/11 x 3/7 + 5/11 x 3/7
= 3/7 = 18/77 + 15/77
= 3/7
b, Cách 1:3/5 x 7/9 - 3/5 x 2/9 Cách 2 :3/5 x 7/9 - 3/5 x 2/9
= 7/15 - 2/15 = 3/5 x (7/9 - 2/9 )
= 1/3 = 3/5 x 5/9
= 1/3
c, Cách 1:(6/7 - 4/7) : 2/5 Cách 2: ( 6/7- 4/7 ) : 2/5
= 2/7 : 2/5 = 6/7 : 2/5 - 4/7 : 2/5
= 5/7 = 15/7 - 10/7
= 5/7
d,Cách 1:8/15 : 2/11 + 7/15 : 2/11 Cách 2:8/15 : 2/11 +7/15 : 2/11
= 88/30 + 77/30 =(8/15+7/15) :2/11
= 11/2 = 1 : 2/11
= 11/2
Bài 2 cậu tự làm nhé !
V
13 tháng 4 2017
a] 4/12 ; 5/12 ; 11/2 ; 1/4
b] 1 ; 9/12; 12/5 ; 11/3
c] 8/21; 6/11;8/7
d] 2/3 ;2/7 15/2
13 tháng 4 2017
a]1/3 5/12 11/2 1/4
b]1 3/4 12/5 33/9
c]8/21 6/11 8/7
d]2/3 2/7 15/2
a,=5/10+6/10
=11/10
b,=6/4+5/4
=11/4
c,=20/8-3/8
=17/8
d,x=1/7.3/4
x=3/28
e,x=1/8:3/2
x=1/8.2/3
x=1/12
a) \(\dfrac{5}{10}+\dfrac{3}{5}=\dfrac{5}{10}+\dfrac{6}{10}=\dfrac{11}{10}\)
b) \(\dfrac{3}{2}+\dfrac{5}{4}=\dfrac{6}{4}+\dfrac{5}{4}=\dfrac{11}{4}\)
c) \(\dfrac{5}{2}-\dfrac{3}{8}=\dfrac{20}{8}-\dfrac{3}{8}=\dfrac{17}{8}\)
d) \(x:\dfrac{3}{4}=\dfrac{1}{7}\)
\(x=\dfrac{1}{7}\times\dfrac{3}{4}\)
\(x=\dfrac{3}{28}\)
e) \(X\times\dfrac{3}{2}=\dfrac{1}{8}\)
\(X=\dfrac{1}{8}:\dfrac{3}{2}\)
\(X=\dfrac{1}{8}\times\dfrac{2}{3}\)
\(X=\dfrac{1}{12}\)
a). \(\dfrac{5}{10}+\dfrac{3}{5}\)
\(=\dfrac{5}{10}+\dfrac{6}{10}\)
\(=\dfrac{11}{10}\)
b).\(\dfrac{3}{2}+\dfrac{5}{4}\)
\(=\dfrac{6}{4}+\dfrac{5}{4}\)
\(=\dfrac{11}{4}\)
c).\(\dfrac{5}{2}-\dfrac{3}{8}\)
\(=\dfrac{20}{8}-\dfrac{3}{8}\)
\(=\dfrac{17}{8}\)
d). \(x:\dfrac{3}{4}=\dfrac{1}{7}\)
\(x=\dfrac{1}{7}.\dfrac{3}{4}\)
\(x=\dfrac{3}{28}\)
e). \(x.\dfrac{3}{2}=\dfrac{1}{8}\)
\(x=\dfrac{1}{8}:\dfrac{3}{2}\)
\(x=\dfrac{1}{8}.\dfrac{2}{3}\)
\(x=\dfrac{2}{24}=\dfrac{1}{12}\)
a) \(\dfrac{5}{10}+\dfrac{3}{5}=\dfrac{5}{10}+\dfrac{6}{10}=\dfrac{11}{10}\)
b) \(\dfrac{3}{2}+\dfrac{5}{4}=\dfrac{6}{4}+\dfrac{5}{4}=\dfrac{11}{4}\)
c) \(\dfrac{5}{2}-\dfrac{3}{8}=\dfrac{20}{8}-\dfrac{3}{8}=\dfrac{17}{8}\)
d) \(X:\dfrac{3}{4}=\dfrac{1}{7} \\ X=\dfrac{1}{7}x\dfrac{3}{4}\\ X=\dfrac{3}{28}\)
e) \(Xx\dfrac{3}{2}=\dfrac{1}{8}\\X=\dfrac{1}{8}:\dfrac{3}{2}\\ X=\dfrac{1}{12} \)
Bạn ơi, cái dấu "." là dấu "x" nhé bạn!!