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105 x 3 + 35 x 89 + 70
= 35 x 3 x 3 + 35 x 89 + 35 x 2
= 35 x 9 + 35 x 89 + 35 x 2
= 35 x (89 + 9 + 2)
= 35 x 100
= 3500
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