20,23 x 14 + 40,46 x 16 + 60,69 x 18

= 20,23 x 14 + 20,23 x 2 x 16 + 20,23 x 3 x 18

= 20,23 x 14 + 20,23 x 32 + 20,23 x 54

= 20,23 x (14 + 32 + 54)

= 20,23 x 100

= 2023

Ta có:

\(a=\dfrac{7}{8}b\)

\(b=\dfrac{6}{5}c\Rightarrow c=b\div\dfrac{6}{5}=\dfrac{5}{6}b\)

\(a+b+c=130\)

\(\dfrac{7}{8}b+b+\dfrac{5}{6}b=130\)

\(\dfrac{65}{24}b=130\)

\(b=130\div\dfrac{65}{24}\)

\(b=130\times\dfrac{24}{65}\)

\(b=48\) (học sinh)

\(\Rightarrow a=48\times\dfrac{7}{8}=42\) (học sinh)

\(\Rightarrow c=130-48-42=40\) (học sinh)

Đáp số: Lớp a: 42 học sinh

             Lớp b: 48 học sinh

             Lớp c: 40 học sinh

1 - 100 = -99

1. boots

2. picture

3.

1) c

2) b

3) d

4) a

5) e

4. Hieu's

5. Rose's

6. A

7. B

8. B

9. A

10. D

11. He is wearing black pants.

12. What color is your shirt?

13. Are these your pajamas?

14. Whose glasses are these?

15. She is wearing a green scarf.

Y : 0,25 + Y : 0,5 + Y + Y : 0,01

= Y x 4 + Y x 2 + Y x 1 + Y x 100

= Y x (4 + 2 + 1 + 100)

= Y x 107

Vô ý.

46. We haven't spoken to each other for a week.

47. Lan didn't remember her birthday, and neither did I.

48. I promise I will visit you when I come to Sa Pa.

49. Mr.Ba's car is the biggest in the company.

50.  Students don't need to wear uniforms today.

Danny likes hot weather because he can go swimming.

sau cơn mưa: trạng ngữ

nước: chủ ngữ

đọng ở những ổ gà trên đường: vị ngữ

SPELL