1. Tính
a) ( -15 + I a I ) - 30 = -26
b) I -15 +a I -30= -26
c) - IaI +21=45+ (-16)
2.Các bn giúp mk nhanh nhé nếu bn nào bt thì nhanh tay sẽ được 1 tick
1. Tính:
a) ( -15 + I a I ) - 30 = -26
b) I -15 +a I -30= -26
c) - IaI +21=45+ (-16)
2.Các bn giúp mk nhanh nhé nếu bn nào bt thì nhanh tay sẽ được 1 tick
1. Tìm a thuộc Z
a) ( -15 + I a I ) - 30 = -26
b) I -15 +a I -30= -26
c) - IaI +21=45+ (-16)
2.Tìm x thuộc Z
I x+1 I - I x-3 I = 0
ai nhanh tay mk tick cho
Tìm a thuộc Z:
a) I a+8 I - (-3)=10
b) I a+2 I + IaI = 0
giúp mk nhanh nhé các bn
a) |a+8| -(-3)=10
|a+8| +3 = 10
|a+8| = 10-3
|a+8| =7
=> a+8 =7 => a= 7-8 => a= -1
a+8 =-7 a= -7-8 a= -15
Câu b mik ko nghĩ ra nhé, xl bn
a) |a+8|-(-3)=10
=> |a+8|=10+(-3)
=>. |a+8|=7
=>. a+8=7 hoặc a+8=-7
=>. a=-1 hoặc. a=-15
Vậy a€{-1;-15}
Mk chỉ làm đc câu này thui!
Bài 1: Tìm a thuộc Z
a) (-15 + I a I ) - 30 = -26
b) I -15 + a I - 30 = -26
c) -I a I + 21 = 45 + (-16 )
10/11+9/10
15/30+7/30
1/2+1/3
3/5+11/15
3/4+1/6
5/11+4/11
3 BẠN GIÚP MÌNH GIẢI BÀI NÀY ĐẦU TIÊN MÌNH SẼ TICK CHO 3 BẠN ĐÓ
NÊN HÃY NHANH TAY GIẢI GIÚP MÌNH ĐI
CẢM ƠN CÁC BẠN NHIỀU NHIỀU
10/11+9/10 = 199/110
15/30+7/30 = 11/15
1/2+1/3 = 5/6
3/5+11/15 = 4/3
3/4+1/6 = 11/12
5/11+4/11 = 9/11
BẠN THẬT XUẤT SẮC
CẢM ƠN BẠN NHA
CHÚC BAN CUỐI TUẦN VUI VẺ
3/5 = ..../15 = 30/......
7/9 = 21/.... = 70/.... = ....../45
các bn giúp mk nhanh nhé, mk đang gấp
3/5 = .9./15 = 30/..50.
7/9 = 21/.27. = 70/.90. = .35./45
\(\dfrac{3}{5}=\dfrac{9}{15}=\dfrac{30}{50}\)
\(\dfrac{7}{9}=\dfrac{21}{27}=\dfrac{70}{90}=\dfrac{35}{45}\)
3/5 = 9/15 = 30/50
7/9 = 21/27 = 70/90 = 35/45
So sánh a)23/21 và 21/23
b)311/256 và 199/203
c)-15/-17 và 16/-19
d)19/26 và 21/25
e)47/57 và -66/76
f)23/32 và 39/48
giúp mk với mk đang cần gấp. bn nào làm được, nhanh, chính xác mk sẽ tick cho
CẢM ƠN BN NÀO ĐÃ GIÚP MK NHÉ
Hi các bạn Mk là Giang nha. Hum nay mk sẽ tổ chuwacs cho các bạn về 1 cuộc thi bn nào nhanh tay thì được tick và đề bài là:
Đề 1 :Talk about your best friend.( Bằng Tiếng Anh )
Đề 2 : Talk about your school.( Bằng Tiếng Anh )
các bn chọn đề nào cx đc trong 2 đề trên nhé từ bây giờ đến 10:00 thì mk sẽ thu bài xem xét và kêu gọi mọi ng` tick cho các bn nha. Bn nào hay nhất thì mk sẽ tick
Đề 1 : Talk about your bestfriend
Hello everybody,my name is Vy.If you want me to tell you about one of my friends,I will think about my best friend firstly.
Her name is Duyen.If you ask : "How does she look ".I will answer : She is tall but slim,she has an oval face with straight nose,big eye, warm slime, and long black hair.I think a Vietnamese girl her is very beautiful.And what about her personality ? She is friendly,careful,kind,.....all good personality that one can have.Not only that, she is a very kind person. Always open your heart to everyone, share, encourage when you are sad, encourage you to do something you want or even happier than you when you get good things.Duyen want to be a teacher, her mother so she studies very hard and always gets good marks but she never arrogant.Duyen is also a funny girl,she always makes me laugh so much when we meet each other.We always play,study and many many activities together.
Maybe later we will not learn or even meet again but I still want to keep the memories of this beautiful friendship in the heart, forever ...
Finally,I want to say to every body : "“Best friends are the people in your life that make you laugh louder, smile brighter and live better”
---------------------------------------------------------Let the sweet friendship refresh your soul----------------------------------------------------------------
đề 1:I have many friends, but i want to tell you about my best friend. Her name is....She is tall and cute. She has dark hair and a round face. We first met each other when we entered primary school. She was my classmate and her seat next to me. We both cooking and reading magazines....We also studying maths and english. But she is a bit better at maths than me. Therefore, she often helps me do maths homework. I really her and I hope to be her best friend forever.
đề 2:............ is the name of my school. It is not very large but it is very beautiful. There are a lot of grean trees along the schoolyard. It has 3 floors. The classroom is full of desks and chair, there is also a blackboard and 8 fans. The teachers are thoughtful and friendly. They always take care of us, so I love them. I have many friènd there. I love my school so much
Cs j sai thì tc cho mik nhoa <3
Đề 1:
My best friend is Hien. She is 13 years old and me too. She and I learned NVT Secondary School,, class 7A2. She is very beautyful. Whenever she smiles, it is time to shine. Hien has long, smooth hair. Not only that, Hien has soft pink skin. Apart from the beauty of her lovely appearance, currently has a warm heart, help others. I was the worst math, each time do not understand this place, Hien talked again. Oh! Admiration! Hien are good at all subjects. Sometimes I really envy Hien. But Hien said to me again, Hien is jealous again with me. I do not know why. Hien says, being a freelance me is great. From then I understood, Hien d life as I did. That's why I Hien. He is the second half of my life. My best friend is Hien.
giupps mk với ai nhanh mk tick
a: 864 x 48 - 432 x 96 / 864 x 48 x 432
b: 16 x 17 - 5 / 16 x 16 +11
c: 45 x 16 + 17 / 28 + 45 x 15
d : 7256 x 4375 - 725 / 3650 + 4375 x 7255
Sorry các bn nha vì mk ko bt ấn dấu gạch ngang ở giứa nên mk viết dấu / các bn giải giúp mk nha
a)
\(\frac{864\cdot48-432\cdot96}{864\cdot48\cdot432}=\frac{432\cdot2\cdot48-432\cdot96}{864\cdot48\cdot432}=\frac{432\cdot96-432\cdot96}{864\cdot48\cdot432}=\frac{0}{864\cdot48\cdot432}=0\)
Làm từng phần một nha =))
b)
\(\frac{16\cdot17-5}{16\cdot16+11}=\frac{16\cdot\left(16+1\right)-5}{16\cdot16+11}=\frac{16^2+16-5}{16^2+11}=\frac{16^2+11}{16^2+11}=1\)
@_@