We usually add, subtract, multiply and divide in decimal form consisting of ten numbers from 0 to 9, but binary is used in the computer.
3. It was only after this problem that I realized that Xiao Ming had 5 1 1 pieces of candy, which were put in 9 boxes respectively. Just tell him the number of candy bars (no more than 5 1 1), and he can take out all the boxes of candy and make up the number you want. How many sweets are there in each box?
I'm a little confused and can't think of anything. I had to wait in line one after another. After five elements, it is found to be a very regular sequence: 1.2.4.8. 16. Multiply all these numbers by 2 to get the next number. I arranged it as follows:1.2.4.8.16.32.64.128.256, which is exactly 5 1 1. It turns out that there are binary numbers in the computer because all numbers can be counted!
I have seen a problem-"Cows eat grass". The grass on the pasture grows at a constant speed, 27 cows can eat for 6 days and 23 cows can eat for 9 days. After eating for 6 days, 18 cows plus 12 cows. How many days will it take to finish eating? Cattle eat the original amount and growth of grass, some cows eat the original grass, some cows eat the grown grass, and the cows eat the increased amount at any time, but there are no more cows who eat the original amount, so first find the original amount and growth, 27× = 162 (portion), (Niu Yi eats grass every day as one portion), 23 * 9. 207-162) ÷ (9-6) = 15 (parts), and the growth amount is15, 162-6× 15 = 72 (parts).
6. Knowledge can also be obtained from books. The page numbers of books are also learned. For example, Book A and Book B use the number of 8642. Book A has 20 pages more than Book B. How many pages does Book A have? First of all, we should know that 1 ~ page needs 1× 9 = 9 (digits), 10 ~ 9 needs 2× 90 = 180 (digits), and 100 ~ 999 needs 2700 digits.
7. In life, mathematics is really everywhere.