Today is Thursday. What day is it in 31 days? I know, but I need to write the formula

Today is Thursday. What day is it in 31 days? I know, but I need to write the formula

Today is Thursday.
Seven days a week, 28 days later or Thursday
It will be Sunday in three days
Let another 31 days be week X
X=4+[31-(4*7)]=7

Today is Tuesday, and the 50th day from today is Sunday___ ．

50÷7=7… Today is Tuesday and another 50 days is Wednesday

Today is Friday, and the 21st day from today is the day of the week

Day 21
(5 + 21-1) / 7 get 4, so it is Thursday
If 21 days is said, it is the 22nd day
That is, (5 + 21) / 7, find the remainder and get 5, which is Friday

Last month, the total electricity charge of four households was 83.2 yuan, and the specific electricity consumption is shown in the table below. Household electricity consumption / kwh electricity charge payable / Yuan Wang family 40 Zhang Jia 38 Zhao family 29 Li family 53 apportion electricity charge according to each household's electricity consumption, and each household should pay more electricity charge?

Total electricity: 40 + 38 + 29 + 53 = 160 (KWH), Wang's: 83.2 × 40160 = 20.8 (yuan), Zhang's: 83.2 × 38160 = 19.76 (yuan), Zhao's: 83.2 × 29160 = 15.08 (yuan), Li's: 83.2 × 53160 = 27.56 (yuan), household electricity consumption / kwh electricity charge payable / yuan, Wang's: 40 20.8, Zhang's: 38 19.76, Zhao's: 29 15.08, Li's: 53 27.56 (yuan)

1. A is bigger than B by 4, B is bigger than C by 4, the product of three numbers is 384
2. The product of five continuous natural numbers is 95040. Find these five numbers
3. If the sum of two numbers is 102 and the product of two numbers can be divided by 3850, what is the difference between the two numbers?
4. The sum of the two numbers is 103, and their product is 2002. What are the two numbers?
They're only in primary school. Besides, I've worked out a problem
Don't think it's complicated. It's just a common topic. Besides, many students copied it from others

1. A is bigger than B by 4, B is bigger than C by 4, the product of three numbers is 384
4 8 12
2. The product of five continuous natural numbers is 95040. Find these five numbers
8 9 10 11 12
3. If the sum of two numbers is 102 and the product of two numbers can be divided by 3850, what is the difference between the two numbers?
fifty-two
4. The sum of the two numbers is 103, and their product is 2002. What are the two numbers?
22 91

Can you explain why to write like this? But you must write the formula
The circumference of a rectangle is 240 meters, and its length is four times of its width. How many meters are the length and width of the rectangle
Use a rope to circle a tree 1 meter above the ground. The length of the rope is 3.768 meters. What is the cross-sectional area of the tree?
Qiqi spent half of the money she took to buy a stationery box, and half of the money she took to buy a pen was less than 1 yuan. This is Qiqi's remaining 6 yuan. How much did Qiqi take?
What is the minimum number of a number divided by 5 to 3, divided by 4 to 2, divided by 8 to 6?

According to the circumference formula of rectangle: C = 2 (a + b), let the width be x, then the length is 4x2 (x + 4x) = 240. The solution is x = 244 × 24 = 96m. A: the length of rectangle is 96m, and the width is 24m. According to the circumference formula of rectangle: C = 2 (a + b) 2. According to the circumference formula of circle: C = 2 π R & nbsp; area formula: S = π R & nbsp

Math problems in primary school should be solved by formulas!
The distance between a and B is 60 kilometers. It takes seven hours to go from a to B, and then to A. It takes 15 kilometers per hour to return. How many kilometers per hour to go?

The time to return is 60 / 15 = 4 (hours), the time to go is 7-4 = 3 (hours), and the speed to go is 60 / 3 = 20
So when you go, you can travel 20 kilometers per hour ("/" means division sign)

Math problems in primary school
100 kg of peanut kernel can extract 36 kg of oil. According to this calculation, how many kg of oil can be extracted from 1 ton of peanut?

1t=1000kg
1000/100=10
36X10=360kg
A: one ton of peanut can extract 360kg of oil

June 1, 2004 is a Tuesday. Can you work out the day of June 1, 2005

Wednesday

The new year's day in 1911 is a Tuesday. What day is the children's day in 1992

Children's day in 1992 is Monday