a) Lớp đó có số nam là:
      (32 + 4) : 2 = 18 (bạn)
    Lớp đó có số nữ là:
      (32 - 4) : 2= 14 (bạn)
b) Số bạn nam chiếm số phần số bạn trong lớp là:
      18 : 32 x 100% = 56,25%

A

1. Our school yard has many flowers.
2. I have taught in this school since 1999.
3. The last time she saw him was 2 weeks ago.
4. My house has a living room, two bedrooms, and a kitchen.
5. The Nile is the longest river in the world.
6. Your room is bigger than my room.
7. We must finish our homework before going to class.
8. Who does this book belong to?

Không. Vì 810 chia hết cho 9 nhưng 1450 ; 64 không chia hết cho 9

\(\left(145\cdot99+145\right)-\left(143\cdot101-143\right)\)
\(=\left(145\cdot99+145\cdot1\right)-\left(143\cdot101-143\cdot1\right)\)
\(=\left[145\cdot\left(99+1\right)\right]-\left[143\cdot\left(101-1\right)\right]\)
\(=145\cdot100-143\cdot100\)
\(=14500-14300\)
\(=200\)

\(125\cdot2\cdot4=5^3\cdot2\cdot2^2=5^3\cdot2^3=10^3\)

=> x = 4

B

It was such an interesting book that I read it many times.