Why is leap year one more day than normal year Thank you. Help me

The leap year of the Gregorian calendar is as follows: the earth's revolution around the sun is called a return year, which is 365 days older than the return year by 5:48:46 seconds. Therefore, the Gregorian calendar has an ordinary year and a leap year. The ordinary year has 365 days, which is 0.2422 days shorter than the return year, and a total of 0.9688 days shorter than the four years. Therefore, one day is added every four years, and this year has 366 days, which is a leap year, After 400 years, there will be 3.12 more days, so there will be three less leap years in 400 years, that is, there will be only 97 leap years in 400 years, so the average length of the Gregorian calendar year is similar to the regression year. Therefore, it is stipulated that if the year is a whole hundred, it must be a multiple of 400 to be a leap year. For example, 1900 and 2100 are not leap years
The earth we live on always revolves around the sun. It takes 365 days, 5:48:46, that is 365.2422 days for the earth to revolve around the sun. For convenience, a year is set as 365 days, which is called an ordinary year. In this way, every four years there will be almost one more day. Adding this day to February, the year will have 366 days, which is called a leap year
Usually, every four years there are three ordinary years, a leap year. The Gregorian calendar year is a multiple of 4, generally a leap year
According to the calculation of a leap year every four years, an average of 0.0078 more days will be calculated every year. In this way, after four hundred years, about three more days will be calculated. Therefore, three leap years will be reduced every four hundred years. Therefore, it is stipulated that the Gregorian calendar year is a whole hundred, and it must be a multiple of 400 to be a leap year, not a multiple of 400 or an ordinary year
In other words, the earth we live on always revolves around the sun. It takes 365 days, 5:48:46, that is 365.2422 days for the earth to revolve around the sun. For convenience, a year is set as 365 days, which is called an ordinary year. In this way, almost one more day is needed every four years. If we add this day to February, there will be 366 days in the year, which is called the year
Usually, every four years there are three ordinary years, a leap year. The Gregorian calendar year is a multiple of 4, generally a leap year
According to the calculation of a leap year every four years, an average of 0.0078 more days will be calculated every year. In this way, after four hundred years, about three more days will be calculated. Therefore, three leap years will be reduced every four hundred years. Therefore, it is stipulated that the Gregorian calendar year is a whole hundred, and it must be a multiple of 400 to be a leap year, not a multiple of 400 or an ordinary year
That is what we usually say:
One leap in four years, no leap in a hundred years, and another leap in four hundred years

How many decimeters is 1.5 times 10 negative cubic meters

The negative third power of 10 is equal to one third of 10, and the negative third power of 1.5 × 10 is equal to 0.015 meters
It's equal to 0.15 decimeter

Xiao Gang read 56 pages a day and 8 / 11 of the whole book in three days. This book is divided into three levels. How many pages are left?

I read page 56 * 3 = 168 in three days
If you read 8 / 11 of the book in three days, 168 divided by 8 / 11 = 231 pages, so the book has 231 pages
The rest is 231-168 = 63 pages!

Do you like children

do you like kids?

It's 68.36 degrees in degrees, minutes and seconds

68.36 = 68 ° 21 minutes 36 seconds

Immerse an iron ball in a rectangular glass container 25 cm long and 18 cm wide. The height of the water surface rises from 6 cm to 8 cm
1. What is the volume of this iron ball in cubic centimeter? 2. What is the area of glass in contact with water in square centimeter?

1. The volume of the iron ball is equal to the volume of the rising water
The water rises so much (length 25X width 18x height 2cm), the volume of iron ball is so much
25x18x2 = 900 CC
2. The area of glass in contact with water around
Two 25x8 glasses and two 18x8 glasses
25X8X2+18X8X2
=400+288
=688 square centimeters

In the equal ratio sequence {an}, the sum of the first n terms is Sn, S3 = 13, S6 = 364, then an=

A primary school has a rectangular test field. If the length of the test field is increased by 6 meters, or the width is increased by 4 meters, the area is increased by 48 square meters
Do you know the area of this experimental field?

Width = 48 △ 6 = 8m;
Length = 48 △ 4 = 12m;
Original area = 8 × 12 = 96 square meters
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The use of punctuation marks
Ellipsis and full stop are often used together,
For example, XXXXXXXX . or XXXXXXXX XXXXXXX.
Excuse me . and Is it the right way to use it?

In fact, in a sentence, if you use a period, you don't need an ellipsis. If you use an ellipsis, you don't need a period. These two symbols are used to end a sentence!

Why is leap year one more day than normal year Thank you. Help me