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giá trị tuyệt đối của -7 là
trả lời :
giá trị tuyệt đối của -7 là 7
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Đại số lớp 6
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In semester I, the number of good students in class 6D was equal to \(\dfrac{2}{7}\) of the remaining students. Into semester II, the number of good students increased by 8 students (the number of students in the class was unchaged), so the number of good students became \(\dfrac{2}{3}\) of the rest. How many students were there in class 6D?
Fill in the blank with the correct number Question 1:ABC and RTS are similar triangles.The value of x is Question 2:If x0 and 5x+8+|3x|0 then x Question 3:I am a multiple of 70 between 400 and 600. My tens digit is odd. Who am I?Answer: Question 4:There are two parallel lines in the figure. What is the value of x? Answer: x Question 5:Each of the 37 students in the grade 8 at a school has one dog or one cat or both a dog and a cat. Twenty students have a dog and 24 students have a cat. How...
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Fill in the blank with the correct number Question 1:
ABC and RTS are similar triangles.
The value of x is Question 2:
If x<0 and 5x+8+|3x|=0 then x= Question 3:
I am a multiple of 70 between 400 and 600. My tens digit is odd. Who am I?
Answer: Question 4:
There are two parallel lines in the figure. What is the value of x?
Answer: x = Question 5:
Each of the 37 students in the grade 8 at a school has one dog or one cat or both a dog and a cat. Twenty students have a dog and 24 students have a cat.
How many students have both a dog and a cat?
Answer: students. Question 6:
Mary is 24 years old. She is twice as old as Bella was when Mary was as old as Bella is now.
How old is Bella now?
Answer: years. Question 7:
Jane draws a circle and a triangle on each page of her booklet, and near each drawing she writes the number of common points of the circle and the triangle.
How many different numbers can she write?
Answer: numbers Question 8:
How many different real numbers satisfy the following equation?
Answer: Question 9:
There are 115 cars in a village of 26 families. Each family has either 4 or 5 cars.
How many families have 4 cars?
Answer: families. Question 10:
The area of trapezoid ABCD is 180
.The altitude is 8 cm,AD is 10 cm,and BC is 17 cm.
What is AB,in centimeters?
Answer: cm.
ABC and RTS are similar triangles.
The value of x is Question 2:
If x<0 and 5x+8+|3x|=0 then x= Question 3:
I am a multiple of 70 between 400 and 600. My tens digit is odd. Who am I?
Answer: Question 4:
There are two parallel lines in the figure. What is the value of x?
Answer: x = Question 5:
Each of the 37 students in the grade 8 at a school has one dog or one cat or both a dog and a cat. Twenty students have a dog and 24 students have a cat.
How many students have both a dog and a cat?
Answer: students. Question 6:
Mary is 24 years old. She is twice as old as Bella was when Mary was as old as Bella is now.
How old is Bella now?
Answer: years. Question 7:
Jane draws a circle and a triangle on each page of her booklet, and near each drawing she writes the number of common points of the circle and the triangle.
How many different numbers can she write?
Answer: numbers Question 8:
How many different real numbers satisfy the following equation?
Answer: Question 9:
There are 115 cars in a village of 26 families. Each family has either 4 or 5 cars.
How many families have 4 cars?
Answer: families. Question 10:
The area of trapezoid ABCD is 180
What is AB,in centimeters?
Answer: cm.
d) e) ; g) .
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d) e)
; g)
.
Đối với phân số ta có tính chất : Nếu và thì .Dựa vào tính chất này, hãy so sánh:a) và ; b) và ; c) và .
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Đối với phân số ta có tính chất : Nếu và
thì
.
Dựa vào tính chất này, hãy so sánh:
a) và
; b)
và
; c)
và
.
Rút gọn:a) ; b) c) ;d) ; e) .
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Rút gọn:
a) ; b)
c)
;
d) ; e)
.
Rút gọn:a) ; b) c) ;d) ; e) .@Bùi Thị Vân
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Rút gọn:
a) ; b)
c)
;
d) ; e)
.
@Bùi Thị Vân
Tính giá trị biểu thức
với ;
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Tính giá trị biểu thức
với
;
Điền số thích hợp vào chỗ chấm.a) b)
Đọc tiếp
Điền số thích hợp vào chỗ chấm.
a)
b)
Hình 26 cho biết hai góc kề bù xOy và yOy, . Tính
Đọc tiếp
Hình 26 cho biết hai góc kề bù xOy và yOy', . Tính
