12:0.5. 15;0.25
dặt dọc nha
K
Khách
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Những câu hỏi liên quan
28 tháng 8 2019
\(\frac{-x}{12}-\frac{x}{15}=\frac{1}{2}\)
\(-15x-12x=90\)
\(-17x=90\)
\(x=\frac{-90}{17}\)
28 tháng 3 2018
\(\frac{28}{15}.\left(0,5\right)^2.3+\left(\frac{8}{5}-\frac{79}{15}\right):\frac{11}{7}\)
\(=\frac{28}{15}.0,25.3+-\frac{11}{3}:\frac{11}{7}\)
\(=\frac{7}{5}-\frac{7}{3}\)
\(=-\frac{14}{15}\)
7 tháng 4 2016
\(17,75-\left(0,5\times x:2-4,2\right)=15\)
\(0,5\times x:2-4,2=17,75-15=2,75\)
\(0,5\times x:2=2,75+4,2=6,95\)
\(0,5\times x=6,95\times2=13,9\)
\(x=13,9:0.5=27,8\)
DT
Dang Tung
CTVHS
28 tháng 12 2023
a) \(\dfrac{1}{3}-\dfrac{1}{3}\times\left(2-\dfrac{3}{5}\right)\\ =\dfrac{1}{3}-\dfrac{1}{3}\times\dfrac{7}{5}\\ =\dfrac{1}{3}-\dfrac{7}{15}\\ =\dfrac{5}{15}-\dfrac{7}{15}\\ =-\dfrac{2}{15}\)
b) \(\dfrac{1}{9}-\dfrac{5}{15}+\dfrac{8}{9}-\dfrac{10}{15}+0,5\\ =\left(\dfrac{1}{9}+\dfrac{8}{9}\right)-\left(\dfrac{5}{15}+\dfrac{10}{15}\right)+0,5\\ =\dfrac{9}{9}-\dfrac{15}{15}+0,5\\ =1-1+0,5\\ =0,5\)
1 tháng 5 2018
\(0,5x-\dfrac{2}{3}=\dfrac{7}{12}\)
\(0,5x=\dfrac{7}{12}+\dfrac{2}{3}\)
\(0,5x=\dfrac{5}{4}\)
\(x=\dfrac{5}{2}\)
DB
6 tháng 4 2017
y+y:0,5+y:0,25+y:0,125=15
y.1+y.2+y.4+y.8=15
y.(1+2+4+8)=15
y.15=15
y=15:15
y=1
6 tháng 4 2017
\(y+y:0,5+y:0,25+y:0,125=15\)
\(y+y\cdot2+y\cdot4+y\cdot8=15\)
\(y\cdot\left(1+2+4+8\right)=15\)
\(y\cdot15\) \(=15\)
\(y=15:15\)
\(y=1\)
S
14 tháng 1 2017
y + y + y : 0,5 + y : 0,25 + y : 0,125 = 15
y x 2 + y x 2 + y x 4 + y x 8 = 15
y x (2 + 2 + 4 + 8) = 15
y x 16 = 15
y = 15 : 16
y = 0,9375
k cho tớ nhé
14 tháng 1 2017
y + y + y : 0.5 + y : 0.25 + y :0.125 = 15
yx2+yx1/2+yx1/4+yx1/8=15
yx(2+1/2+1/4+1/8)=15
yx23/8=15
y=15:23/8=120/23
TH
26 tháng 11 2021
15.Choose the best option to complete the sentence.
It is a custom in Vietnam that we use _________ to pick up food.
(0.5 Points)
fork
chopsticks - Người VN có phong tục dùng đũa để gắp thức ăn.
spoon
16.Which word has the odd sound in the underlined part?
(0.5 Points)
respect /i/
accept /e/
ancestor /e/
generation /e/
17.Which sentence is best written form the word cues_
- According / tradition/ you / not /sweep / floor / first day / Tet.
(0.5 Points)
According to tradition, you shouldn’t sweep the floor on the first day of Tet.
According to tradition you mustn’t sweep the floor in the first day of Tet.
According tradition, you shouldn’t sweep the floor on the first day of Tet.
According to tradition, you shouldn’t sweep the floor on first day of Tet.
18.Which sentence has the closest meaning to the original one:
- You must go home now or it’s too late.
(0.5 Points)
You can go home now or it’s too late.
You should go home now or it’s too late.
You are obliged to go home now or it’s too late.
It is necessary for you to go home now or it’s too late.
19.Choose the best option to complete the sentence.
In our school, students are not _______ to sit on the table.
(0.5 Points)
obliged
needed
allowed - được cho phép
welcomed
20.Choose the best option to complete the sentence.
Showing ______ to older people is a good tradition in our country.
(0.5 Points)
love
behavior
honor
respect - Thể hiện sự tôn trọng với người già là một truyền thống tốt đẹp của nước ta.
21.Which word has the different stress pattern?
(0.5 Points)
festival
uniform
ancestor
occasion - trọng âm rơi vào âm tiết thứ 2, còn lại 1
22.Choose the best option to complete the sentence.
Before leaving the dinner table, do you have to ask for _____.
(0.5 Points)
permit
permission - sự cho phép
permitted
permitting
NT
0