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10 tháng 7 2015

= 1/2 - 1/3 + 1/3 - 1/4 + 1/4 - 1/5 + ... + 1/9 - 1/10

= 1/2 - 1/10

= 2/5

2 tháng 4 2015

6,7 . mình không chắc lắm

Fill in the blank with the correct numberQuestion 1:Complete the number pattern:  0,3,8,15,24,,48.Question 2:Find the area of the shaded region if A and B are squares of sides 5cm and 8cm respectively. Answer: The area of the shaded region is  .(write your answer by decimal in simplest form)Question 3:If , compute =.Question 4:The side of each square grid is 2cm. Find the area of the shaded region.Answer: The area of the shaded region is  .Question 5:If , find the value of m in .Answer:...
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Fill in the blank with the correct number

Question 1:
Complete the number pattern: 
 0,3,8,15,24,,48.

Question 2:
Find the area of the shaded region if A and B are squares of sides 5cm and 8cm respectively. 

Answer: The area of the shaded region is  .
(write your answer by decimal in simplest form)

Question 3:
If , compute =.

Question 4:

The side of each square grid is 2cm. Find the area of the shaded region.
Answer: The area of the shaded region is  .

Question 5:
If , find the value of m in .
Answer: m=.

Question 6:
How many whole numbers between 1 and 100 are not divisible by 3 or 11?
Answer:  numbers.

Question 7:
Evaluate:
=.
(round to four decimal places)

Question 8:
Evaluate:
=.
(write your answer by decimal in simplest form)

Question 9:
Find the whole number A knowing that A is 9 units greater than the average of A, 38, 45 and 67.
Answer: A=.

Question 10:
Find the whole number C knowing that C is 14 units smaller than the average of C, 68, 72, 99.
Answer: C=.

3
15 tháng 4 2017

Câu 3, 4, 5, 7, 8 các câu bỏ qua nhé

15 tháng 4 2017

Câu 3, 4, 5, 7, 8 các cậu bỏ qua nhé

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

0

\(\frac{1}{2\cdot3}+\frac{1}{3\cdot4}+\frac{1}{4\cdot5}+...+\frac{1}{38\cdot39}+\frac{1}{39.40}\)

\(=\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{38}-\frac{1}{39}+\frac{1}{39}-\frac{1}{40}\)

\(\frac{1}{2}-\frac{1}{40}\)

= 0,475

Câu hỏi 1: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 pensCâu hỏi 2:Fill in the blank: 1m2 = ....... cm2. Choose the correct answer.10000   1000   100   100000Câu hỏi 3:Choose the correct answer. Calculate: 3/4 x 5/4 = ?8/4  15/16  15/4   8/16Câu hỏi 4:Calculate: 1/2 - 2/5 + 5/3 = ....49/30  52/30   53/30   51/30Câu hỏi 5:Which fraction is equal to 51/34?17/11    3/4   102/48    9/6Câu...
Đọc tiếp

Câu hỏi 1:

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 2:

Fill in the blank: 1m2 = ....... cm2. Choose the correct answer.

10000   1000   100   100000

Câu hỏi 3:

Choose the correct answer. Calculate: 3/4 x 5/4 = ?

8/4  15/16  15/4   8/16

Câu hỏi 4:

Calculate: 1/2 - 2/5 + 5/3 = ....

49/30  52/30   53/30   51/30

Câu hỏi 5:

Which fraction is equal to 51/34?

17/11    3/4   102/48    9/6

Câu hỏi 6:

Write 42/63 in lowest term.

4/6   4/9   2/3   6/9

Câu hỏi 7:

Choose the correct answer. Which of the following fractions is greater than 1?

2/3  7/9  11/12   14/8

Câu hỏi 8:

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 9990   9 and 9090   989 and 1099   9 and 989

Câu hỏi 9:

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 10:

Fill in the blank: 37 minutes 48 seconds + 29 minutes 36 seconds = .... minutes 24 seconds.

67  66  65 68

3
5 tháng 3 2017

1.

2.10000cm2

3.15/4

4.53/30

5.9/6

6.6/3

7.14/8

5 tháng 3 2017

Bn lên Google dịch rồi dịch những bài này sau đó rồi làm nha .

Tk cho mk nha

20 tháng 10 2015

1/ A=B

2/ The rectangle ACFD's area is 162cm^2

3/ 3

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