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13 tháng 9 2016

The average of 2 boys is : 131,6 x 2 = 263,2 cm

The average of 4 girls is : 128,3 x 4 = 513,2 cm

Have all of children are : 2 + 4 = 6 children

So an average height of 6 children's : ( 263,2 + 513,2 ) : 6 = 129,4 cm

( bấm đúng nha)

14 tháng 9 2016

đúng bao nhiêu phần trăm vậy bạn?

Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people? Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits? Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number? Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book? Câu 5...
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Câu 1 :Each of cars can take 8 people. How many cars needed to take 124 people?

Câu 2 : How many integer numbers between 200 and 300 are there for which the hundreds digit equals the sum of the other two digits?

Câu 3 : The average of five numbers is 20. The average of the five number is 18 when one of the numbers is chaned to 4. What is the orginal value of the changed number?

Câu 4 :A book has 250 pages starting at number 1. How many digits are there in the page numbers of the book?

Câu 5 : Find A, if A is 3 less than the average of 48; 55; 29 and A. The value of A is…

Câu 6 : The sum of denominator and numerator of a fraction is 121 and the fraction is equal to 4/7. Find the denominator of the fraction?

Câu 7 : The sum of two numbers is equal to 77. If the first number is multiplied by 8 and the second by 6, the two product are equal. The larger of these numbers is…

Câu 8 : Which is the greatest 2 - digit number divisible by 2, 3 and 4?

Câu 9 : Calculate: (1 + 2/5) x 6/7.

Câu 10 : Give the number sequence: 1, 4, 7, 10, 13, … Find the 15th term of the number sequence.

2
13 tháng 12 2018

cậu lạc đè rồi

27 tháng 12 2020

câu 1:16 ; câu 2 : ai mà biết được 

11 tháng 10 2016

toan chu ko phai la tieng anh

đây là chỗ hỏi tiếng anh ak

2 tháng 3 2016

trung bình cộng của 27;49 và 89 là:

(27 + 49 + 89) : 3 = 55

đáp số: 55

31 tháng 1 2016

Dịch là:

TBC của tất cả các số liên tiếp từ 10 đến 100 là...

Giải

Số các số hạng là

          (100-10):1+1=91(số)

Tổng dãy là

          (100+10)x91/2=5005

Tbc là

           5005/91=55

                              Đáp số:55

         

31 tháng 1 2016

Mức trung bình của số liên tiếp 10-100 là ...

I don't no

28 tháng 2 2016

tiếng việt : trung bình cộng của các số liên tiếp từ 10-100 là 

bài làm : số số hạng : ( 100 - 10):1+1 = 91 

tổng dãy :(100+10)x91 :2=5005 

trung bình cộng là : 5005:91 = 55 

=> The average of consecutive numbers from 10 to 100 is 55 

28 tháng 2 2016

55

k nha

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