C

12×3+12×4+12×19=312

12 x 3 + 12 x 4 + 12 x 19

= 12 x (3 + 4 + 19)

= 12 x (7 + 19)

= 12 x 26

= 312

Gọi 4 số tự nhiên liên tiếp là:

\(x;x+1;x+2;x+3\)

Theo đề bài:

\(x+\left(\right.x+1\left.\right)+\left(\right.x+2\left.\right)+\left(\right.x+3\left.\right)=2642\Rightarrow\) \(4x+6=2642\Rightarrow\) \(4x=2636\Rightarrow\) \(x = 659\)

Vậy số tự nhiên nhỏ nhất là:659

Gọi số tự nhiên nhỏ nhất là \(x\).
Ba số tiếp theo lần lượt là \(x + 1\), \(x + 2\), và \(x + 3\).
Theo đề bài, tổng của 4 số này bằng 2642:
\(x+(x+1)+(x+2)+(x+3)=2642\)
\(4\times x+(1+2+3)=2642\)
\(4\times x+6=2642\)
\(4\times x=2642-6\)
\(4\times x=2636\)
\(x=2636:4\)
\(x=659\

The Yellow Butterfly

Yellow butterfly,
Yellow butterfly,
Flying high, flying low.
The butterfly flies to the flower,
The flower blooms beautifully.
The butterfly flies away,
Leaving the lovely flower behind.

Đúng rồi bạn

đr

cái này học theo quy tắc thôi

tôi biết nhg ko thuộc đc

1 B

2 C

3 A

1. B

2. C

3. A

1.goes

2.am

3.yes ,it is or no , it isn't

=> Answer

1. Goes

2. Am

3. Yes, it is or No, it isn't

tham khảo

1.There are 7 people in my family

2.The oldest person in my family is my grandfather.

3.My father is a engineer

4.No, I am an only child

5.We usually have dinner and watch TV together in the evening

1. How many people are there in your family?

→ There are 6 people in my family.

2. Who is the oldest person in your family?

→ The oldest person in my family is my grandmother.

3. What does your father do?

→ My father is an electronic component painter.

4. Do you have any brothers or sisters?

→ Yes, I have a younger sister and a younger brother.

5. What do you usually do with your family?

→ We usually have dinner together every evening.

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