Giúp em từ câu 9 đến câu 24
Link: ĐỀTHI THỬ FORM 2- 2021-2022.pdf - Google Drive
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Những câu hỏi liên quan
S
1
SM
1
4 tháng 12 2021
Câu 1: The sum of all one digit numbers?
1+2+3+4+...+9=45
Câu 2: Which value is not equal to 4500? (45tens, 450tens, 45 hundred)
45tens
Câu 3: Which number below is the word form of 20 300?
twenty thousand and three hundred
Câu 4: How many two digit odd numbers are there that are greater than 15?
17; 19; 21; .....; 99=> (99-17):2+1=83 numbers
Câu 5: Lily writers a number. It has the digit 5 in the thousands place and the digit 8 in the units place. Which of these numbers could Lily have written?
5008
Câu 6: What is the smallest posible number that can be written using the digits 4, 7, 0, 6? (use each digit only once)
0476( because it doesn't talk that the number need 4 digits)
Câu 7: If the sum of three consecutive natural numbers is less than 90, find the largest possible value of the largest natural number is?
n;n+1;n+2 => 90:3=30-> n+1=30=> n=29=>n+2=31
Câu 8: How many multiples of 4 lie between 1000 and 2500?
=> 1000\(\le\)x\(\le\)2500=> There are 376 numbers is the multiples of 4
Câu 9: Read number: 35 206 :.thirty five thousand two hundred and six
Câu 10: Jack finished the bicycle race with a time of 34152 seconds, Jane finished with a time of 34215 seconds, and Tina finished with a time of 34125 seconds. In what order did they finish the race?
The same order
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
1 tháng 12 2023
A = \(\dfrac{\dfrac{2022}{1}+\dfrac{2021}{2}+\dfrac{2020}{3}+...+\dfrac{1}{2022}}{\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{2023}}\)
Xét TS = \(\dfrac{2022}{1}\) + \(\dfrac{2021}{2}\) \(\dfrac{2020}{3}\) +... + \(\dfrac{1}{2022}\)
TS = (1 + \(\dfrac{2021}{2}\)) + (1 + \(\dfrac{2020}{3}\)) + ... + ( 1 + \(\dfrac{1}{2022}\)) + 1
TS = \(\dfrac{2023}{2}\) + \(\dfrac{2023}{3}\) +...+ \(\dfrac{2023}{2022}\) + \(\dfrac{2023}{2023}\)
TS = 2023.(\(\dfrac{1}{2}\) + \(\dfrac{1}{3}\) + \(\dfrac{1}{4}\) +...+ \(\dfrac{1}{2023}\))
A = \(\dfrac{2023.\left(\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{2023}\right)}{\left(\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{2023}\right)}\)
A = 2023
H9
HT.Phong (9A5)
CTVHS
16 tháng 6 2023
\(2022\times2005-2000\times2022+15\times2022-20\times2021\)
\(=2022\times\left(2005-2000+15\right)-20\times2021\)
\(=2022\times20-20\times2021\)
\(=20\times\left(2022-2021\right)\)
\(=20\times1\)
\(=20\)
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
16 tháng 6 2023
a, 2022 \(\times\) 2005 - 2000 \(\times\) 2022 + 15 \(\times\) 2022 - 20 \(\times\) 2021
= (2022 \(\times\) 2005 - 2000 \(\times\) 2022 + 15 \(\times\) 2022 )- 20 \(\times\) 2021
= 2022 \(\times\) (2005 - 2000 + 15) - 20 \(\times\) 2021
= 2022 \(\times\) (5 +15) - 20 \(\times\) 2021
= 2022 \(\times\) 20 - 20 \(\times\) 2021
= 20 \(\times\) (2022 - 2021)
= 20 \(\times\) 1
= 20
9 C
10 D
11 B
12 A
13 A
14 C
15 B
16 C
17 B
18 C
19 D
20 C
21 D
22 C
23 D
24 D
https://drive.google.com/file/d/1X6cLjcyPJwoOWZ3w9N1A10th07ID5L63/view