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số trung bình cộng là : ( 11+ 6+ 5 + 18) : 4 =10
Vậy trung bình cộng là 40
a) 2/4; 3/6; 4/8; 5/10
b) 160/200; 240/300; 320/400; 400/500
a)\(\frac{1}{2}=\frac{2}{4}=\frac{3}{6}=\frac{4}{8}=\frac{5}{10}\)
b)\(\frac{80}{100}=\frac{40}{50}=\frac{20}{25}=\frac{4}{5}=\frac{16}{10}\)
tổng bình phương hai số bằng???hay (a+b)^2=???
hiệu bình phương hai số bằng???hay (a-b)^2=???
các bạn trả lời sai hết rồi , cái gì xảy ra cuối năm 2015 là con số 5 .
Exam number 119:38
Fill in the blank with the suitable sign (>; =;<)
Question 1:
Compare: 3170 – (4123 – 1892) 3170 – 4123 + 1892
Fill in the blank with the suitable number
Question 2:
Which number comes next in the following series?
Answer:
Question 3:
How many days are there in September?
Answer: There are days.
Question 4:
In 6724, which digit is in the tens place?
Answer:
Question 5:
Calculate:
Question 6:
How many numbers are there?
Answer: There are numbers.
Question 7:
The perimeter of a square is 3dm 6cm. What is its area in centimeter square?
Answer: The area of the square is
Question 8:
The perimeter of the following square is cm.
Question 9:
Find x such that
Answer: x =
Question 10:
How many triangles are there in the figure below?
Answer: There are triangles.