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21 tháng 7 2017

The number of A's is:
(99-3): 2 + 1 = 49 (term)
=> A = (99 + 3) * 49: 2 = 2499
Dress......

21 tháng 7 2017

A = 2499

8 tháng 3 2017

Mình chỉ biết làm phần a thôi à :

a , Dãy trên có số số hạng là :

     ( 57 - 1 ) : 2 + 1 = 29 ( số hạng )

Vậy tổng của tất cả các số lẻ  từ 1 đến 57 là :

         ( 57 + 1 ) x 29 : 2 = 841

                 Đáp số : 841

ĐÚNG 100% LUÔN NHA , TK MÌNH NHÉ !!

8 tháng 3 2017

đơn giản

I'm sorry to say that I don't see any mathematical expressions. And you should translate your questions into Vietnamese so all people can answer them.

6 tháng 8 2016

I am very sorry but I cannot see any numbers to answer your questions

Water is important to us in many ways. We use water for (1)…………….., washing, farming and in many (2)…………ways. But, some times there us not enough clean water for (3)………………Although water (4)……………seventy percent of the earth, (5)…………..………three percent of this water is (6)………………water; the rest is salt water, (7)…………….from the ocean. Additionally, (8)…………………has made a lot of water too dirty for people to (9)…………………            Because of the (10)……….……….of water, the United Nations (UN) created an...
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Water is important to us in many ways. We use water for (1)…………….., washing, farming and in many (2)…………ways. But, some times there us not enough clean water for (3)………………Although water (4)……………seventy percent of the earth, (5)…………..………three percent of this water is (6)………………water; the rest is salt water, (7)…………….from the ocean. Additionally, (8)…………………has made a lot of water too dirty for people to (9)…………………
            Because of the (10)……….……….of water, the United Nations (UN) created an international clean water (11)………………….from years 1981 to 1990. The UN wanted to (12)……….………everyone enjoy clean water. (13)………………, The UN wanted everyone to have an (14)………………….way to obtain water. Unfortunately, many people have to (15)………………..water a long (16)……time………….because they don’t have water in their homes.
            In some areas, access to water is especially bad when there is problem by organizing (19)…………….to build dams or (20)……………….to catch water during the rainy seasons. We must always remember to conserve when using it. Without water, human, animal and plant life will cease to exist.

(Mình đang cần gấp nên mn làm nhanh nhanh giúp mình với ạ, mình cảm ơn trước nha)

0
28 tháng 12 2016

mình ko hiểu tại sao ko ai chịu giúp bạn cả,nhưng mình sẽ giúp bạn nhưng bạn phải

bài này dễ tính lắm,đáp án là 51

20 tháng 1 2017

Viết sai chữ " máy tính " rồi kìa, phải là calculator chứ không phải calculate . 

Question 1:The perimeter of the circle is cm(Write your answer by decimal in the simplest form)Question 2:Calculate: 626.35+525.36 =Question 3:Calculate:(Write your answer in the simplest form)Question 4:There are 60 seats on a train. 40% of the seats are empty. How many empty seats are there in the train?Answer: There are empty seats.Question 5:A car traveled at a constant speed for 5 hours, covering a total distance of 301km. How far did the car travel for one hour?(Write your answer by...
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Question 1:

The perimeter of the circle is cm
(Write your answer by decimal in the simplest form)

Question 2:
Calculate: 626.35+525.36 =

Question 3:
Calculate:
(Write your answer in the simplest form)

Question 4:
There are 60 seats on a train. 40% of the seats are empty. How many empty seats are there in the train?
Answer: There are empty seats.

Question 5:
A car traveled at a constant speed for 5 hours, covering a total distance of 301km. How far did the car travel for one hour?
(Write your answer by decimal in simplest form)
Answer:

Question 6:

The value of m is

Question 7:
Mrs. Jane buys 10kg of flour. She uses 1/6 of it to make a cake and 1/3 of it to make grape pies. How many kilograms of flour are left?
Answer: kg.

Question 8:
45% of M is 72. The value of M is

Question 9:
Emily rides her horse 21km in 7/6 hours. What is her average speed in kilometers per hour?

Answer: Her average speed is kilometers per hour.

Question 10:
Anna multiply together the following numbers

How many zeros are there at the end of the product?
 Answer: There are zeros.

0
Choose the correct answer. Calculate: 3/4 x 5/4 = ? 8/4 15/16 15/4 8/16 Câu hỏi 2: Calculate: 1/2 - 2/5 + 5/3 = .... 49/30 52/30 53/30 51/30 Câu hỏi 3: Alice's mother is now four times as old as she. Four years ago, her mother was thirty years more than her. How old is Alice now? 12 6 10 8 Câu hỏi 4: Choose the correct answer. Which of the following fractions is greater than 1? 2/3 7/9 11/12 14/8 Câu hỏi 5: Which fraction is equal to 51/34? 17/11 3/4 102/48 9/6 Câu hỏi 6: Fill in...
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Choose the correct answer. Calculate: 3/4 x 5/4 = ? 8/4 15/16 15/4 8/16 Câu hỏi 2: Calculate: 1/2 - 2/5 + 5/3 = .... 49/30 52/30 53/30 51/30 Câu hỏi 3: Alice's mother is now four times as old as she. Four years ago, her mother was thirty years more than her. How old is Alice now? 12 6 10 8 Câu hỏi 4: Choose the correct answer. Which of the following fractions is greater than 1? 2/3 7/9 11/12 14/8 Câu hỏi 5: Which fraction is equal to 51/34? 17/11 3/4 102/48 9/6 Câu hỏi 6: Fill in the blank: 37 minutes 48 seconds + 29 minutes 36 seconds = .... minutes 24 seconds. 67 66 65 68 Câu hỏi 7: Charlie has eighteen pens more than Bill. Bill has one third as pen as Charlie. How many pens does Bill have? 9 pens 6 pens 3 pens 2 pens Câu hỏi 8: Fill in the blank: 1m2 = ....... cm2. Choose the correct answer. 10000 1000 100 100000 Câu hỏi 9: The sum of two numbers is the greatest - four digit number and their ratio is the smallest - two digit number. Find these numbers. 900 and 99 909 and 9090 989 and 10 999 and 989 Câu hỏi 10: Write 42/63 in lowest term. 4/6 4/9 2/3 6/9

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27 tháng 5 2017

The country is (1)........more.....beautiful than a town and more pleasant to live in. Many people think so, and go to the country (2) .....on..... the summer holiday though they can't live (3) ...there.......... all the year round. Some have cottage built in a village (4) ....so...... that they can go there whenever they (5) ......have....find the time.

English villages are not alike, but (6)............. some ways they are not very different from (7) ...................other. Almost every village (8) ...........a church, the round or square tower of which can (9) ............seen from many miles around. Surrounding the church is the church yard, (10).......... people are buried.

27 tháng 5 2017

The country is (1).......more......beautiful than a town and more pleasant to live in. Many people think so, and go to the country (2) .....on..... the summer holiday though they can't live (3) ....there......... all the year round. Some have cottage built in a village (4) .....so..... that they can go there whenever they (5) .....have.....find the time.

English villages are not alike, but (6)....in......... some ways they are not very different from (7) .......each............other. Almost every village (8) .......has....a church, the round or square tower of which can (9) ........be....seen from many miles around. Surrounding the church is the church yard, (10)......where.... people are buried.