11. doesn't like
12. have
12. go, goes
14. likes
15. goes

Tổng chiều dài và chiều rộng hình hộp chữ nhật là: 
 108 : 4 : 2 = 13,5 (cm)
            Đáp số : 13,5 cm

Kể từ lúc bắt đầu đi, sau số giờ hai xe máy gặp nhau là:
 109,5 : (35 + 38) = 1,5 giờ = 1 giờ 30 phút 
                    Đáp số : 1 giờ 30 phút

8,5 cm

4. How far is it from Thanh Hoa to Ha Noi city?
5. I used to walk to school when I was a student.
6. Although Tien Dung goalkeeper is so young, he performs excellently.
7. How far is it from Vinh to Ha Noi city?
8. I used to walk to school when I was a student.
9. In spite of being short, they still love playing sports.
10. Less electricity will be used in the future.

So sánh S_AMC và S_ABC
Ta có: \(\dfrac{Samc}{Sabc}\) = \(\dfrac{MC}{AB}\) = \(\dfrac{1}{2}\) (Chung chiều cao từ A xuống BC)
-> S_AMC = 180 x \(\dfrac{1}{2}\) = 90 (cm²)
So sánh S_AMN và S_AMC 
Ta có: \(\dfrac{Samn}{Samc}\) = \(\dfrac{AN}{AC}\) = \(\dfrac{1}{2}\) (Chung chiều cao từ M xuống AC)
-> S_AMN = 90 x \(\dfrac{1}{2}\) = 45 (cm²) 
                          Đáp số : 45 cm²

1. She wasn't tired last night.
Was she tired last night?
2. I wasn't in London last month
Was I in London last month?
3. They weren't at Nina's house yesterday
Were they at Nina's house last night?
4. She wasn't with him yesterday.
Was she with him yesterday?
5. Tom wasn't at school last Monday.
Was Tom at school last Monday?

1. didn't take; went
2. worked
3. didn't kick; played
4. didn't have; ate
5. went
6. didn't get; got
7. didn't send; wrote

Vì 8x7y chia hết cho 2 và 5
-> y = 0
Ta có:
(8 + x + 7 + 0) chia hết cho 9
(15 + x) chia hết cho 9
-> x = 3
            Đáp số : x = 3; y = 0

Thời giân ô tô đi hết quãng đường AB là:
 11 giờ 45 phút - 7 giờ - 15 phút = 4 giờ 30 phút = 4,5 giờ
Quãng đường AB dài:
 56 x 4,5 = 252 (km)
           Đáp số : 252 km