Dongdong is 12 years old this year, but he has only had three birthdays. He is______ Month______ He was born on the 15th

Dongdong is 12 years old this year, but he has only had three birthdays. He is______ Month______ He was born on the 15th

Dongdong is 12 years old and has three birthdays, 12 △ 3 = 4, which means that he has only one birthday in four years, that is, he was born on February 29 of leap year. A: he was born on February 29. So the answer is: 2, 29

When you are 12 years old, you only have 3 birthdays. When was your birthday

February 29. Every four years there is a leap year, leap year will appear on February 29. 12 / 3 = 4

315 divided by 15 plus 85 times 15 is calculated by the recursive equation method

315 divided by 15 plus 85 times 15 = 21 + 85 * 15 = 21 + 85 (10 + 5)
=21+850+425=871+425=1296
Hope to help you,

Solution equation: 5x + 3.25 times 4 = 2 times 4x
If the problem. Master please enter ~ ~ solution!

5x + 3.25 * 4 = 2 * 4x
5x-2*4x=-3.25*4
-3x=-13
x=13/3
So the solution of 5x + 3.25 * 4 = 2 * 4x is x = 13 / 3

Through this novel, I understand whether life is a disease

I've done it many times in high school. I can't use "pass" and "make" at the same time
Through this novel, I understand life
This novel makes me understand life
If it's not a sick sentence, it can't be understood

How many kilometers is 400 meters the simplest fraction

400m = 2 / 5km

Simple calculation of 9 △ 13 + 13 △ 9 + 11 △ 13 + 14 △ 9 + 6 △ 13
Simple calculation

9÷13+13÷9+11÷13+14÷9+6÷13
=（9+11+6）÷13+（13+14）÷9
=26÷13+27÷9
＝2+3
=5

A very, very simple math problem. One minute,
The following table shows the percentage of plain, water area, mountainous area and hilly area in Anhui Province
Plain water, mountain and hill
Accounting for 31.3% 8.0% 31.2% 29.5% of the total area of the whole province
1. The ratio of the area of plain in Anhui Province to that of the whole province is ()
2. The ratio of water area in Anhui Province to that of the whole province is ()
3. The ratio of the total area of mountains and hills in Anhui Province to that of the whole province is ()
4. What is the main terrain in Anhui Province?

1. The ratio of plain area in Anhui Province to that of the whole province is (1:3)
2. The ratio of water area in Anhui Province to that of the whole province is (2:25)
3. The ratio of the total area of mountains and hills in Anhui Province to that of the whole province is (1:2)
4. Anhui Province is dominated by plain terrain?

A natural number is a multiple of 3 and 2. There are 10 factors including 1 and itself. What is the natural number?

Three

Xiao Li and Xiao Qiang use stones, scissors and cloth to decide who will jump first. How many possible results are there

Three results. Xiao Li wins, Xiao Qiang wins and draws