b) Did they lock the door?
c) Did she open her present?
d) Did he carry the boxes?

e) Did you call your best friend?
f) Did she play volleyball?
g) Did your brother study History?
h) Did you wait for the bus?
i) DId he listen to music last night?
j) Did they help their mother? 

did they lock the door

Did she open the present

Did he carrie the boxes

Did you call your bestfriend

b. Did they lock the door?

c. Did she open her present?

d. Did he carry the box?

e. Did you call your best friend?

f. Did she play volleyball?

g. Did my brother study history?

h. Did we waited for the bus?

i. Did he listen to music last night?

j. Did they help thier mother?

B

b

C

D

D

D

1. This book was interesting. It wasn't boring.
2. They were Japanese. They weren't American.
3. We were in the café. We weren't at school.
4. Tweetie was a bird. He wasn't a parrot

1. Where were you yesterday?
2. Were they at the cinema?
3. Who was your favourite actor?
4. Was she a maths teacher?
5. When were they born?
6. Was he famous in the 1940s?

were / wasnt / werent / wasnt / were / were / were / were

1. Works

2. Became

3. Skied

4. Did-have

5. Have-finish

Sai thì thông cảm nha!

3.10:

Hồng đến lúc:

10h40p+15p=10h55p

Hương phải đợi Hồng trong:

10h55p-10h20p=35p

3.9:

a: (3 giờ 25 phút-1 giờ 40 phút)*5

=(2 giờ 85 phút-1 giờ 40 phút)*5

=(1 giờ 45 phút)*5

=5 giờ 225 phút

=8 giờ 45 phút

b: (25 phút 30 giây+1 giờ 58 phút 50 giây):2

=(24 phút 90 giây+118 phút 50 giây):2

=142 phút 140 giây:2

=71 phút 70 giây

=72 phút 10 giây

c: 3 giờ 25 phút+1 giờ 40 phút*5

=3 giờ 25 phút+5 giờ 200 phút

=8 giờ 225 phút

=11 giờ 45 phút

d: 25p30s+1h58p50s:2

=25p30s+118p50s:2

=25p30s+59p25s

=84p55s

e: 2 giờ 15 phút*3+3 giờ 45 phút*2

=6 giờ 45 phút+6 giờ 90 phút

=12 giờ 135 phút

=14 giờ 15 phút

a

Tính diện tích toàn phần của hình lập phương ta lấy: cạnh x cạnh x 6 = V lập phương

=> 1,5 x 1,5 x 6 = .........tự tính......

S_tp hình lập phương = \(a\times a\times6\)
=> Diện tích toàn phần của hình lập phương có cạnh là 1,5 dm là:
              1,5 x 1,5 x 6 = 13,5 (dm²)
                    Đáp số: 13,5 dm²
--> Chọn A

Chọn B

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