Xiao Ming is in a heavy mood because he knows he is wrong

Xiao Ming is in a heavy mood because he knows he is wrong

Xiao Ming knows that he is wrong, and his heart is heavy
Improper collocation of words

How do we change the cleanliness of the classroom

We should keep the classroom clean

99 divided by 15 is equal to 99

15/99=5/33

There are 25 chickens and rabbits in total. The feet of chickens are 20 more than those of rabbits. How many chickens and rabbits are there respectively?

Suppose there are x chickens, then there are 25-x rabbits. According to the meaning of the question, we can get the equation: 2X-4 × (25-x) = 20 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2x-100 + 4x = 20 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 6x = 120 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 20, then there are 25-20 = 5 rabbits. Answer: there are 20 chickens, and there are 5 rabbits

1:1 and 3:1 minus 15:8 plus 35:12 minus 63:16 plus 99:20

The answer is 12 out of 11
First, 1 and 1 / 3 are regarded as 1 plus 1 / 3;
Then 8 out of 15 is regarded as 1 out of 3 plus 1 out of 5;
Similarly, 12 out of 35 is regarded as 1 out of 5 plus 1 out of 7; 16 out of 63 is 1 out of 7 plus 1 out of 9; 20 out of 99 is 1 out of 9 plus 1 out of 11
If you add up the above, you will find that all the additions and subtractions in the middle are offset, leaving only 1 plus 1 / 11, so the final answer is 12 / 11

How to express 235000000 in scientific notation?

The octave of 2.35 * 10

Polysyllabic characters in Lesson 12, Volume 2, grade 6 of Chinese

The first sound is a cut; the first sound is a cut; the third sound is a cut; the second sound is a cut; the second sound is a cut; the fourth sound is a cut; the second sound is a cut; the fourth sound is a cut; the fourth sound is a cut; the second sound is a cut; the fourth sound is a cut; the fourth sound is a cut; the fourth sound is a cut; the fourth sound is a cut; the fourth sound is a cut; the fourth sound is a cut

As shown in the figure: quadrilateral ABCD, ad = 7 cm, BC = 3 cm, ∠ bad, ∠ BCD are right angles, ∠ ADC = 45 degrees. Q: what is the area of quadrilateral ABCD______ ．

Lengthen AB, lengthen DC, intersect at point E, and get two isosceles right triangles △ ade and △ CBE. According to the properties of isosceles right triangles: AE = ad = 7 cm, CE = CB = 3 cm, then the area of quadrilateral ABCD is: 7 × 7 △ 2-3 × 3 △ 2, = 24.5-4.5, = 20 (square cm); answer: the area of quadrilateral ABCD is 20 square cm, so the answer is: 20 square cm

Sequence 1,3 + 5 + 7,9 + 11 + 13 + 15 + 17,19 + 21 + 23 + ＋29＋31,… The sum of item 20 of is ()

First, there is an odd number
Second, there are three odd numbers,
Third, there are five odd numbers
.
The n-th term has 2N-1 odd numbers
Let the sum of the first n terms be SN
S1=1
s2=1+3＋5＋7
S3=1+3＋5＋7+9＋11＋13＋15＋17
Then Sn = n ^ 2 * (1 + 2 * n ^ 2-1) / 2 = n ^ 4
So the sum of item 20 = s20-s19 = 20 ^ 4-19 ^ 4 = 29679

Questions and answers about gratitude to parents, judgment questions and multiple choice questions

Q & A: how do you thank or repay your parents? How do you thank or repay your parents?
Judgment: which one plays a more important role in your heart between your parents and your lover? Are you grateful to your parents until you earn enough money?
Choice: how to be grateful to your parents? In your life, in your relationship or in your career