12,12 x 7,5 + 12,12 : 2 + 12,12 + 12,12

= 12,12 x 7,5 + 12,12 x 0,5 + 12,12 x 1 + 12,12 x 1

= 12,12 x (7,5 + 0,5 + 1 + 1)

= 12,12 x 10

= 121,2

121,2 nha bạn

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giúp mình với

Hello, everybody! Allow me to introduce myself. My name is Hai, I am 13 years old and a student at Gia Thụy secondary school . My favorite subject is math. I was born and grew up in Ha Noi. At the moment, I am living with my parents and a younger brother.I am a quiet, a little bit childish but also factual, dexterous and roman lady. In the education views, I am diligent, clever and patient with my study or even work and I never give up even though I know a lot of hardships are waiting for me in the future. My hobbies are jewellery collections, taking a walk in the afternoon, listening to music and watching movies. Parularly, I really love to watch how to make a sweet cake videos from the internet. I also enjoy playing badminton and riding a bicycle.My dream is to be a successful business woman so that now I am trying to study as hard as I can to get into the right subject that I love. And I also hope that my dream will come true and surely I will do everything to make it come true.

ngày hôm qua làm việc của mình chi chi đó nà

a. Ta có: 

60 x (2^k - 1) = 420 -> k= 3 

Vậy số lần nguyên phân của tế bào sinh dục sơ khai là 3 

b. Số thoi phân bào xuất hiện trong số lần nguyên phân: 2³ - 1 = 7 lần

c. Số NST môi trường cung cấp cho giảm phân: 60 x 2³ = 480 NST 

d. Số giao tử hình thành là: 2³ x 4 = 32 giao tử

Số hợp tử tạo thành là: 32 x 25% = 8 hợp tử

There are four seasons in one year, every season leaves me a special impression. However, autumn is perhaps the one that I like best. It usually lasts from July to September of the year. The weather is quite cool and pleasant. The sky is blue and pretty high while the sun is warm. Cool winds bring the scent of new paddy fields or guava flavor in the garden. On the two sides of the road, the colorful chrysanthemum show off its beauty in the sunshine. All the children are eagerly waiting for the school day, our parents take us to stores to buy books and other personal items preparing for new school year. Everyone is all looking forwad to seeing their friends after three months of summer vacation. Especially, in the middle of Autumn, we also breake the moon cake very happily. How wonderful is it! I hope autumn will come soon.

Nowadays, energy is being run out more and more so it is one of the most important things of our life. We need to save energy because nobody of us can lives without energy. So why don't we start to do it right in our home? We have many ways to save energy in our home. One of those ways is using electricity, water and gas economically. Such as we should turn off the light in room when we go out or in unnecessary situations, avoid wasting water, shut the kitchen stove when stop cooking. Use a microwave instead of a stove to reheat food. Use rechargeable batteries instead of disposable batteries... Besides, we should use electrical equipments which are energy - saving. Such as using lights and fans that have low capacity, or using equipments which reserve electricty. Not only do these help us to save money but also they work effectively.
In addition, we should frequently check electrical equipments in our home in order to fix opportunely. In summary, we need to save energy so that energy isn't run out and continues to serve human's life.

Đoạn văn này nói về việc tiết kiệm năng lượng ở nhà , coi như có bảo vệ năng lượng nhé !

Nowadays, energy is being run out more and more so it is one of the most important things of our life. We need to save energy because nobody of us can lives without energy. So why don't we start to do it right in our home? We have many ways to save energy in our home. One of those ways is using electricity, water and gas economically. Such as we should turn off the light in room when we go out or in unnecessary situations, avoid wasting water, shut the kitchen stove when stop cooking. Use a microwave instead of a stove to reheat food. Use rechargeable batteries instead of disposable batteries... Besides, we should use electrical equipments which are energy - saving. Such as using lights and fans that have low capacity, or using equipments which reserve electricty. Not only do these help us to save money but also they work effectively.
In addition, we should frequently check electrical equipments in our home in order to fix opportunely. In summary, we need to save energy so that energy isn't run out and continues to serve human's life.

We use energy for most every thing we do. But energy aren't abundant so we must save energy. To save energy, we should turn off the  light before go to bed. Moreover we should use low energy buld. Finally, we should use pullic transport to long distance.

Đây là bài làm của mk nếu có sai sót thì thông cảm nha .

   257,89x0,32+257,89x0,58+257,89

=257,89x(0,32+0,58)+257,89

=257,89x0,9+257,89

=232,101+257,89

=489.991

Chúc bn hok tốt

ez

=257,89 nhân cho [0,32+0,58] +25,789

=25,789 nhân cho 10 + 25,789

= 25,789 nhân cho [ 10 + 1]

=283,679

đấy easy