a) \(\frac{7}{8}\),\(\frac{7}{10}\) ,\(\frac{7}{13}\) ,\(\frac{7}{12}\)
b)\(\frac{1}{4}\) .\(\frac{3}{10}\) ,\(\frac{9}{40}\) ,\(\frac{3}{8}\)
quy đồng và sắp xếp từ bé đến lớn
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Gọi 3 số tự nhiên liên tiếp lần lượt là: n, n+1, n+2
Ta có: n+ (n+1) + (n+2) = 3n + 3 = 3(n+1) chia hết cho 3
Bạn tham khảo nhé !
Ta thấy hiệu hai số liền nhau là 9 đơn vị
Vậy hiệu của số thứ 18 và số 27 là :
9 x 18 =162
Số cuối là :
27 + 162 = 189
Vậy số cuối là 189
1. He went to the dentist because he had a toothache.
2. I didn't take part in volunteer programs because I didn't have enough time.
3. He doesn't want to go and see the film because he's already seen it.
4. She's popular in school because she's honest and polite.
5. She scolded Alex because he didn't complete his hommework.
6. I went home late night because I missed the last bus.
1. He went to the dentist because he had a toothache
2. I didn't take part in volunteer programs because i didn't have enough time
3. He didn't want to go and see the film because he has seen it already
4. She is popular in school because she is honest and polite
5. She scolded Alex because he didn't complete his homework
6. I went home late last night because i missed the last bus
V.
1. He stopped the car because the traffic lights turned red
2. Jane didn't join out programme as she had to take a summer course
3. Since he behaved very rudely, Everyone dis him
4. Because they lik.e doing something useful, they do volunteer work
5. I won't be able to attend the meeting since I'll be on holiday with my family
6. As it was raining heavily, we decided to stay home and watch TV
7. Because he wants to get fit, he's training hard
8. Since sally was ill, she didn't go to school yesterday
Question 21 : secretary
Question 22 : nurse
Question 23 : clowns ( bạn xem lại đề câu này )
Question 24 : go
Mình muốn chỉnh lại đề bài chút. Lần thứ hai là 1/2 số gạo còn lại nhé bạn!
Vậy số gạo còn lại sau lần bán thứ nhất là: 21 x 2= 42 (tạ)
Mà 42 tạ lại bằng 2/3 tổng số gạo ( vì 1- 1/3 = 2/3) nên lúc đầu cửa hàng có số gạo là: 42 : 2 x 3 = 63 (tạ)
Đáp số: 63 tạ gạo
Nếu thấy đúng bạn k cho mình nhé!
Quy đồng tui làm ở ngoài
a) \(\frac{7}{8}\)=\(\frac{7x1560}{8x1560}\)=\(\frac{10920}{12480}\)
\(\frac{7}{10}\)=\(\frac{7x1248}{10x1248}\)=\(\frac{8736}{12480}\)
\(\frac{7}{13}\)=\(\frac{7x960}{13x960}\)=\(\frac{6720}{12480}\)
\(\frac{7}{12}\)=\(\frac{7x1048}{12x1048}\)=\(\frac{7280}{12480}\)
b) \(\frac{1}{4}\)=\(\frac{1x10}{4x10}\)=\(\frac{10}{40}\)
\(\frac{3}{10}\)=\(\frac{3x4}{10x4}\)=\(\frac{12}{40}\)
\(\frac{9}{40}\)
\(\frac{3}{8}\)=\(\frac{3x5}{8x5}\)=\(\frac{15}{40}\)
hơi dài xíu có gì sai mong bạn thứ lỗi đó là cách quy đồng của mình