HOC24
Lớp học
Môn học
Chủ đề / Chương
Bài học
Diện tích lát sàn của căn phòng là:
6x6=36 (m2) = 360000cm2
Diện tích một mảnh gỗ hình chữ nhật là:
15x8=120 (cm2)
Cần số mảnh gỗ để lát kín căn phòng đó là:
360000:120=3000 (mảnh gỗ)
Đ/S: 3000 mảnh gỗ
Có số học sinh thích môn toán là:
40:10x8= 32 (học sinh)
Có số học sinh thích môn vẽ là:
40:10x6= 24 (học sinh)
Đ/S: 32 học sinh; 24 học sinh
Trung bình cộng của tất cả các số tự nhiên liên tiếp từ 1;2;3;...;2013 là:
(1+2013):2=1007
Đ/S: 1007
My grandma will be seventy years old in 2022.
I will invite some classmates to my birthday next Saturday.
1. I went to the new Mexican restaurant yesterday.
2. I have never been there. Did you like it?
3. I have not seen Ann for a very long time.
4. Really? I saw her yesterday at the gym.
5. How long have they been married?
6. Only a year. They got married last June.
7. No, you don't have to. I have already done it.
They usually get up (B) early and do morning exercise.
What do (A) you do after school? - I usually do my homework.
Mary often watches (C) TV after dinner with her parents.
What does your mother do (B) in the evening? - She helps (B) me with my homework.
I sometimes go to the sports centre with my friends in (D) the afternoon.
The children often ride a bike in the afternoon.
Her mother always cooks dinner after work.
My brother sometimes talks with friends online in the evening.
Lily likes listening to music after dinner.
Tam and her friend always go to school early.
- What does she do after school?
- I always have a big breakfast.
- Who do you go to school with?
- Tim likes playing badminton.
- This is the way we eat our food.
47 x 52 + 47 x 49 - 47
= 47 x 52 + 47 x 49 - 47 x 1
= 47 x (52+49-1)
= 47 x 100
= 4700