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14 tháng 12 2015

Half the circumference of the land is:

90:2=45 {cm}

Land width is:

{45-7}:2=19 {cm}

Length land is:

19+7=26 {cm}

Area of this land is:

26x19=494 {\(cm^2\)}

Đ/S:494\(cm^2\)

 

28 tháng 12 2016

diện tích là:

((12+4):2) x ((12-4):2)=32(cm2)

28 tháng 12 2016

bằng 32 tớ chắc luôn

17 tháng 4 2022

ai yêu mik kb nha

Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5)Question 1:A classroom is 6.5 meters long and 4.2 meters wide. What is its area?  Answer: Its area is ................................ (Write your answer by decimal in the simplest form)Question 2:The area of the trapezoid below is  .........................Question 3:What is 50% of 824?Answer: .........................................Question 4:The perimeter...
Đọc tiếp

Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5)

Question 1:
A classroom is 6.5 meters long and 4.2 meters wide. What is its area? 
 Answer: Its area is ................................ 
(Write your answer by decimal in the simplest form)

Question 2:
The area of the trapezoid below is  .........................

Question 3:
What is 50% of 824?
Answer: .........................................

Question 4:

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

Question 5:
45% of M is 72. The value of M is ............................

Question 6:
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 7:
The perimeter of a rectangular land is 90m. Its length is 7m longer than its width. The area of this land is  ..................

Question 8:

The value of m is ..........................

Question 9:
Anna multiply together the following numbers

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

Question 10:
If  and n is a natural number then n = ..........................

2
14 tháng 10 2015

3)=412

4)21,98

5)32,4

11 tháng 8 2016

Question 1:  27,3

Question 2: 18

Question 3:  412

Question 4:  21,98 cm

Question 5: M=32,4

Question 6: 60,2

Question 7: 494

Question 8: m=9

Question 9: 4 zeros

Question 10: n=5

6 tháng 9 2015

The length is: 3/4 + 1/12 = 5/6km

Area of land is: 3/4 . 5/6 = 5/8km2

18 tháng 7 2016

sai rồi bạn ơi shorter là ngắn hơn mà đáp án là 0.5 km^2