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Đặt tính rồi tính

Biết 100 ha ruộng muối cho sản lượng 1 720 tấn muối. Hỏi trung bình mỗi héc-ta ruộng muối cho sản lượng bao nhiêu tấn muối?

Viết số thập phân thích hợp vào chỗ chấm.

a) 23 kg = ........................ tạ

b) 145 g = ........................ kg

c) 1 293 kg = ......................... yến

Tính nhẩm

Hoàn thành bảng.

Số lượng máy bay mỗi loại mà mỹ viện trợ cho Liên Xô trong Chiến tranh thế giới thứ hai được thể hiện như tỏng bảng sau:

Một chiếc máy bơm trung bình mỗi giây bơm được 300,25 l nước. Hỏi sau 10 giây, máy bơm bơm được bao nhiêu lít nước?

Viết số thích hợp vào chỗ chấm.

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This is the point at (14) _______ many believe the most damaging impacts of climate change can be avoided

A commonly cited goal is to (13) ______ GHG concentrations around 450-550 parts per million (ppm), or about twice pre-industrial levels

A. stabilize 

Depending on our choices, (12) ______ scientists predict that the Earth could eventually warm by as little as 2.5 degrees or as much as 10 degrees Fahrenheit.

A. another

B. every

C. some

D. much

But what we do from today forward (11) ______ a big difference.

B. tells

D. causes

(10) _______ we stopped emitting greenhouse gases (GHGs) today, the Earth would still warm by another degree Fahrenheit or so

It would be a good idea to eat less high-cholesterol food.

A. We have to eat less high-cholesterol food.

B. You should eat less high-cholesterol food.

It's been three years since we last dined at that cozy Italian restaurant.

A. We didn’t dine at that cozy Italian restaurant three years ago.

B. We hadn’t dined at that cozy Italian restaurant for three years.

Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.

John asked Alex, "What time will the train leave tomorrow?"

A. John asked Alex what time the train left tomorrow.

B. John asked Alex what time the train would leave the next day.

The city council passed new regulations for public transportation. Commuters experienced shorter wait times and more efficient routes.

A. Only after the city council passed new regulations for public transportation did commuters experience shorter wait times and more efficient routes.

B. Had the city council passed new regulations for public transportation, commuters would have experienced shorter wait times and more efficient routes.

Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.

We forgot to set the alarm. We woke up late this morning.

A. If we hadn’t forgotten to set the alarm, we wouldn’t have woken up late this morning.

B. If we had forgotten to set the alarm, we would have woken up late this morning.

Jane and Janet are talking about women's roles.

- Jane: "I think married women should not go to work."  

- Janet: " ________. I think they should stay at home because they are good at looking after their children and doing housework."  

A. I quite agree.