How to make elementary school math alphabets and formulas?The following are the general steps for making elementary math alphabets:
* * 1. Confirm the table structure **
1. * * Heading design **
- The first column could be the name of the formula, such as "operational law","geometric figure related formula","quantitative relationship formula", etc.
- The second column was used to write the alphabetic expression of the formula, and the third column could be used to simply describe the meaning or scope of application of the formula.
2. * * Form Body **
- According to the knowledge of primary school mathematics, they would fill in the categories.
* * 2. Fill in the content **
1. * * Laws of Operations **
- In the name column of the formula, write "Commutative law of addition", in the letter expression column, write "a + b = b + a", and in the meaning description column, write "The position of the addend of the addition exchange of two numbers, and the sum is unchanged".
- For the "law of additivity," the expression was "(a + b)+ c = a +(b + c)", meaning "adding three numbers, first add the first two numbers, or first add the last two numbers, then add the third number, the sum is unchanged."
- Commutative law of multiplication: "a × b = b × a", which meant that "when two numbers are multiplied, the position of the factor is exchanged, and the product remains unchanged."
- The law of association for multiplication: "(a × b) × c = a × (b × c)","Multiply three numbers, first multiply the first two numbers, or first multiply the last two numbers, and then multiply the third number, the product does not change."
- The law of distribution of multiplication: "(a + b) × c = a × c + b × c","The sum of two numbers multiplied by the same number can be multiplied by two addenda respectively, and then the two products are added together, and the result remains the same."
2. * * Geometric-Figure Formula **
- rectangular dependence
- The formula was named "Rectangle Perimeter", and the expression "C =(a + b) × 2"(where C represented the circumference, a represented the length, and b represented the width) was described as "calculating the sum of the lengths of the four sides of the rectangular shape."
- Rectangle Area "S = a × b"(S represents the area),"Calculating the size of the plane occupied by the rectangular shape."
- square dependence
- The circumference of the square was "C = 4a"(a is the length of the side)."Calculating the sum of the four sides of the square."
- Square area "S = a2","calculate the size of the square."
- The area of the triangle was "S = ah div2"(a is the base, h is the height),"calculate the size of the plane occupied by the triangle, multiply the base by the height and divide by 2".
- "The area of the quadrilateral" S = ah "(a is the base, h is the height)," calculate the size of the plane occupied by the quadrilateral."
- The area of the echelon was "S =(a + b) h div2"(a is the top base, b is the bottom base, and h is the height)."Calculating the size of the plane occupied by the echelon, multiply the sum of the top base and the bottom base by the height and divide it by 2."
- circular dependence
- The diameter of a circle was "d = 2r"(d is the diameter, r is the radius), and "the diameter is twice the radius."
- The circumference of the circle,"C = 2 pi r or C = pi d","calculate the length of one circle".
- The area of the circle was "S = Pi r 2","Calculating the size of the plane occupied by the circle".
- Cuboids
- The cuboid volume "V = abh"(a is length, b is width, h is height),"calculate the space occupied by the cuboid".
- Cube volume "V = a cubic"(a is the length of the edges),"calculate the space occupied by the cube."
- cylindrical dependence
- The side area of the cylinder was "S = CH = 2 Pi rh"(C is the circumference of the bottom, r is the radius of the bottom, and h is the height), and "calculate the area of the expanded figure on the side of the cylinder."
- The surface area of the cylinder was "S = 2 Pi r 2 + 2 rh","calculate the total surface area of the cylinder, the two base areas plus the side area".
- The volume of the cylinder was "V = Sh = Pi r 2 h", and "calculate the space occupied by the cylinder".
- Cone volume "V = Sh div3 = Pi r 2 h div3"(S is the base area, h is the height, and r is the radius of the base),"Calculating the size of the space occupied by the cone, it is one-third of the volume of the cylinder with the same base and height."
3. * * Formula of quantity relationship **
- The relationship between yield, quantity and total yield
- The name of the formula was "Total production calculation", and the expression was "Total production = unit yield × quantity", which described "finding total production with known unit production and quantity".
- Unit yield: Unit yield = total yield/quantity, known total yield and quantity, unit yield.
- "quantity = total production/unit yield"."Given total production and unit yield, calculate quantity."
- Speed, time and distance
- Distance: Distance = Speed x Time. Distance with known speed and time.
- Speed: "Speed = Distance/Time","Given Distance and Time, Find Speed".
- Time: "Time = Distance/Speed","Given Distance and Speed, Find Time".
- The relationship between unit price, quantity and total price
- Total price: "Total price = unit price x quantity","Total price with unit price and quantity".
- "Unit price = total price/quantity","Find unit price with total price and quantity".
- "quantity = total price divided by unit price","quantity with total price and unit price known".
- The relationship between work efficiency, working hours and total work volume
- Total workload: "Total workload = work efficiency x work time"."Given work efficiency and work time, calculate total workload."
- Work efficiency: "Work efficiency = total amount of work divided by working hours","work efficiency with known total amount of work and working hours".
- Working hours: "Working hours = total work volume/work efficiency","Given total work volume and work efficiency, calculate working hours."
* * 3. Beautify the form **
1. You can use a table drawing tool (such as the table function in excel and word) to adjust the row height and column width of the table to make the table content clear.
2. Make the table head bolder and color different to enhance the legibility of the table.
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