5.9.8.16.11.23.14.30.( )( ) It's better to give an example of a formula

Base item 5 8 11 14 the difference between each number is 3
Even items 9 16 23 30 the difference between each number is 7
So it's very simple. 5.9.8.16.11.23.14.30. (17) (37)

Calculation: 20082-2012 × 2004

20082-2012×2004=20082-（2008+4）×（2008-4）=20082-20082+42=42=16．

There are x science and technology books. Story books are four times as many as science and technology books. There are 450 more story books than story books

4x-x=450
3x=450
x=450/3
x=150

There are 42 monkeys sharing peaches. The average big monkey has 2 peaches each. The big monkey has 56 more peaches than the little monkey. How many big monkeys and little monkeys each participate in the sharing?

The distance between Nanjing and Shanghai is 300 kilometers. A car from Nanjing to Shanghai travels 80 kilometers per hour. How many hours can it reach Shanghai

Speed × time = distance
Set X hours to Shanghai
80x=300
x=300÷80
x=3.75
Formula: 300 △ 80 = 3.75 hours

How to write the reading questions in the first unit of the people's education press fifth grade volume II Chinese exercise book?
To me, the impression of the west is associated with desolation, remoteness, novelty and exotic customs. It is the top of mountains and the source of rivers, It is the boundless black Gobi and endless yellow desert. But it is also a rich oasis, a fertile prairie, a murmuring snow mountain spring, and a melodious pastoral song. It is the laughter under the grape trellis, a spinning skirt, and a dancing braid. It is a greasy mutton kebab with cumin and a large piece of white tender mutton
The west is the passage of eastern and Western civilization, and the land bridge connecting Europe, Africa and Asia. It is the Silk Road opened in ancient times, the endless caravan, the perfume and textile of friends on the hunchback, the exquisite porcelain and crafts in the cart, the hard long journey, and the happy Camel bell in the sunshine
In ancient times, people didn't feel far away from her because of the prosperity of the western region. Jiezhuo's going out of the fortress is a common envoy, and it's a great honor to perform meritorious service in a foreign land. Li Bai, the great poet of Tang Dynasty, was born in Suiye city in the western region. He went to the country with his sword and white hair. He traveled and sang all over the mountains and waters of the motherland
Over the past 50 years, the western region has been a vast expanse of wheat fields and cotton fields; a derrick, a tanker, an oil pipeline; an atomic base, a launching pad, a support for the mainland, a production and construction, a powerful national defense, and a great national prestige
Now, a bigger change is going to take place in the West. It will become a miracle of human civilization and a fruit of the 21st century. I can't predict your future smile in the West
1. Explain the meaning of the words in brackets first, and then understand the meaning of the words in context
(continuous stream)
Long distance (trek)
Section (a) out of the fortress:
(battle) sword (go) country:
2. Read the passage carefully and find out which sentences are related to the text
Sentences related to grassland:
Sentences related to the white poplar:
Related to the Silk Road:
Sentences related to "building the railway to Lhasa":
3. Write down the meaning of each natural paragraph
①
②
③
④
⑤
4. Sum up the main content and emotion of this article. (train of thought: merging paragraph is the most common way to sum up the main content; the author's thought is implied between the lines. Therefore, grasping the key words and sentences and grasping the emotional tone of the whole article is a good way to experience the feelings.)
Impression of the West (excerpt)

1: Look it up in the dictionary. The explanation in the dictionary is very clear
2: (1) but she is also a rich oasis, a fertile prairie, a gurgling snow mountain and spring, and a melodious pastoral. (2) she is the top of mountains and the source of rivers, the boundless black Gobi and the endless yellow desert. (3) she is the Silk Road opened in ancient times, an endless stream of caravans, spices and textiles of friends on her hunchback, The west is the gateway of eastern and Western civilization, the land bridge connecting Europe, Africa and Asia
The above answer is my answer, if there is any mistake, please forgive me

The least common multiple of 12, 18 and 24
If you want to answer me, give him 5 points. If you don't want to give me 0, come on, or you won't be robbed by others

The ratio of 1.5 to X is equal to the ratio of 3 to 1.8

1.5:x=3:1.8
3x.=1.5*1.8
3x.=2.7
x. = 2.7 divided by 3
x.=0.9

Given rational number C

Because C0
It is reduced to (1) 2 (A-C)
(2) Left formula = B-C + A-B = a-C
It is equal to the right form

It is known that the K, N, P terms of the arithmetic sequence constitute three consecutive terms of the arithmetic sequence. If the arithmetic sequence is not a constant sequence, then
The common ratio of the equal ratio sequence is

Let the first term of the arithmetic sequence be A1, the tolerance be D, and D ≠ 0, the common ratio of the arithmetic sequence be T. If t ≠ 1 (otherwise d = 0), then the k-th term of the arithmetic sequence is a1 + (k-1) d, the n-th term of the arithmetic sequence is a1 + (n-1) d, and the p-th term of the arithmetic sequence is a1 + (p-1) d. let a1 + (k-1) d = x - (1), then a1 + (n-1) d = x * t

5.9.8.16.11.23.14.30.( )( ) It's better to give an example of a formula