They like to read these books, which are their English translations

They like to read these books, which are their English translations


The books that they like to read are these.



We should read extra-curricular books to improve our knowledge and writing ability


We should read extracurricular books, increase knowledge and improve writing level



Words play an important role in what and what of civilization


Communication development



Intelligence problem: Xiao Ming has 15 math problems. If he does one right, he gets 8 points. If he does one wrong, he gets 3 points. Finally, he gets 65 points. How many problems does Xiao Ming do right?


If you do all the 15 questions right, you can get a score of 8 x 15 = 120
3 points deducted for each mistake + 8 points less = 11 points less in total
65 points = 120 points - 5 points 11 points
So ten are right and five are wrong



Natural numbers smaller than 2 have 1 and 0, right


Yes, it is now in line with international standards. It was stipulated a few years ago that 0 is also a natural number, so the natural numbers smaller than 2 are 1 and 0



Xiao Ming has a pair of scissors and a piece of square paper. He plans to cut one corner of the square with scissors, but he can't think how many corners are left in the end of the paper
Draw all the situations considered and show the remaining corners


There are three kinds. One has five corners, two has three corners, and three has four corners



A cuboid water tank is 40 cm long, 30 cm wide and 35 cm high. The original water depth is 10 cm. After a square iron block with 20 cm edge length is put in, how many cm higher is the water surface than the original?


What is the bottom area of the tank
40 × 30 = 1200 (cm2)
What is the volume of water
1200 × 10 = 12000 (cm3)
What is the bottom area of the iron
20 × 20 = 400 (cm2)
After putting in the iron, the bottom area of the water tank becomes smaller
1200-400 = 800 (square centimeter)
Now the water is high
12000 △ 800 = 15 (CM)
[I hope I can help you]



How to calculate 2.22 × 9.9 + 6.66 × 6.7 simply
Grade five of primary school


2.22×9.9+6.66×6.7
=2.22×3×3.3+6.66×6.7
=6.66×3.3+6.66×6.7
=6.66×(3.3+6.7)
=6.66×10
=66.6



() square centimeter = 0.912 square decimeter?


(91.2) square centimeter = 0.912 square decimeter



It costs 20 yuan to buy a story book and a science and technology book, and 72 yuan to buy the same three story books and four science and technology books. How much is a story book and a science and technology book


It costs 20 yuan to buy a story book and a science and technology book, and 72 yuan to buy the same three story books and four science and technology books,
A science and technology book 72-20 * 3 = 12 yuan
A story book: 20-12 = 8 yuan