A complete set of formulas for primary school mathematics must be memorized. In our study and life, mathematical formulas are widely used. We often use various formulas to improve the calculation efficiency. There are many types of formulas in mathematics, such as area formula and distribution rate, which are used frequently. Let's take a look at the complete set of formulas for primary school mathematics.
A complete set of formulas that primary school mathematics must recite 1 1. Unit conversion.
1, unit of length
1km = 1000m 1m = 10DM 1DM = 10cm 1cm = 10mm
2. Area unit
1 m2 = 100 square decimeter 1 square decimeter = 100 square centimeter
1 cm2 = 1 00mm2 1 ha =10000m21km2 =1ha.
3. unit of volume
1 m3 = 1000 cubic decimeter
1 cm3 = 1000 cm3
4. unit of volume
1 liter = 1 cubic decimeter = 1000 ml 1 ml = 1 cubic centimeter.
5. Weight unit
1 ton = 1 000kg1kg =1000g
6. RMB unit
1 yuan = 10 angle 1 angle = 10 point 1 yuan = 100 point.
7. Time unit
1 century = 100 1 year =65438+ February.
The big month (3 1 day) is135781kloc-0/the small month (30 days) in February is: 4 6 9 1 1 month.
February 28th in a normal year and February 29th in a leap year.
There are 365 days in a normal year and 366 days in a leap year.
1 day =24 hours 1 hour =60 minutes 1 minute =60 seconds 1 hour =3600 seconds.
Second, the geometric formula
1. square
Circumference of a square = side length ×4 Formula: C=4a
Area of a square = side length × side length
Formula: S=axa
Volume of cube = side length x side length x side length formula: V = V = V=axaxa
2. Square
The circumference of a rectangle = (length+width) ×2 Formula: C=(a+b)×2.
Area of rectangle = length × width
Formula: S=axb
Cuboid volume = length× width× height formula: V=axbxh
Step 3: Triangle
Area of triangle = base x height +2.
Formula: S=axh÷2
4. Parallelogram
Area of parallelogram = base x height
Formula: S=axh
5. trapezoidal
Trapezoidal area = (upper bottom+lower bottom) x height +2 formula: S=(a+b)h÷2.
6. circle
Diameter = radius ×2 Formula: d=2r
Radius = diameter +2 Formula: r=d+2
Circumference =πx diameter formula: C=πd=2πr
Area of circle = radius x radius xπ formula: S=πr2.
7. Cylinder
The circumference x of the bottom surface in the side area of the cylinder is high. Formula: S=Ch=πdh=2πrh.
Surface area of cylinder = perimeter of bottom x height+area of circles at both ends.
Formula: S=Ch+2s=Ch+2πr2.
Total volume of cylinder = bottom area x height. Formula: V=Sh
8. Cone
Total volume of cone = base area x height x 1/3 formula: V= 1/3Sh.
Third, the quantitative relationship:
1, x copies each = total
Total copies/number of copies = number of copies
Total copies/number of copies = number of copies
2, 1 multiple x multiple = multiple
Multiply1Multiply = Multiply
Multiply/Multiply = 1 Multiply
3. Speed × time = distance
Distance/speed = time
Distance/time = speed
4. Unit price x quantity = total price
Total price/unit price = quantity
Total price ÷ quantity = unit price
5. Work efficiency x working hours = total workload.
Total amount of work ÷ work efficiency = working hours
Total workload ÷ working time = working efficiency
6. Appendix+Appendix = Total
And-one addend = another addend
7. Negative-negative = difference
Negative difference = negative
Difference+Minus = Minus
8, factor x factor = product
Product ÷ One factor = another factor
9. Dividend bonus = quotient
Dividend = divisor
Quotient x divisor = dividend
10 formula, sum and difference problem
(sum+difference) ÷2= large number
(and a difference) ÷2= decimal.
1 1, and the problem of times
Sum \ (multiple-1)= decimal
Decimal x multiple = large number (or sum of decimals = large number)
12, differential time problem
Difference ÷ (multiple-1)= decimal
Decimal x multiple = large number (or decimal+difference = large number)
A complete set of formulas that primary school mathematics 2 must recite. add
Appendix+Appendix = Sum
Sum = Appendix+Appendix
Addendum sum = another addend
Another addend = and-addend
The position and sum of commutative addends remain unchanged.
Second, subtraction.
Negative-negative = difference
Difference = minuend-minuend
Negative difference = negative
Subtraction = minuend-difference
Difference+Minus = Minus
Negative = negative+difference
Third, digitalization.
1, the first digit of a number from the right is a single digit (indicating several ones), the second digit is a tens digit (indicating several tens), and the third digit is a hundred digits (indicating hundreds).
Two out of 2 and 20 10, or 20 out of 20 1.
3. 10 has 1 tens, or 10 has 10 ones.
4. Reading and writing are too high to be cold. Reading is writing words, and writing is writing math words.
5. Write math words in front of each word and language words behind each word.
Fourth, column calculation
? Below "}" is the total, which is calculated by addition. (+)
? Above "}" is the search part, which is calculated by subtraction. (-)
5. What is the specific size?
Find how much a large number is more than a decimal, and work it out by subtraction. (-)
Find how much the decimal is less than the large number, and calculate by subtraction. (-)
That is: find a problem with more numbers than another.
Sixth, know the time.
1, short hour hand and long minute hand. 1 hour =60 minutes 60 minutes = 1 hour 1 minute = 15 minutes.
2. When the minute hand points to 12, it is the hour, and the hour hand points to the number, it is the time.
3. When the minute hand points to 6, it is half hour, and when the hour hand crosses the number, it is half hour.
There are twelve numbers on the clock face. There are five squares between two numbers, and there are sixty squares in a week.
5. When the hour hand turns the number in an instant, the minute hand turns the square in one minute.
6, the hour hand just passed the number a few, indicating how long. If you want to ask how many points you got, please look at the minute hand carefully.
Seven, gather together ten songs
Make up ten songs: children clap their hands. Let's sing ten songs. Nine equals one, eight equals two, seven equals three, six equals four, and two or five equals ten.
Ten-fold method: divide the decimal and round the large number. Division of large numbers and rounding of decimal places.
8. The equal sign is less than the greater than the sign
The big mouth is facing the big number, and the pointed end is facing the decimal number.
The big mouth is bigger than the number on the left and smaller than the number on the right.
Both sides are equal, with equal sign.
Nine, graphic application problems
Find out the known conditions and problems first, and then decide to use addition and subtraction. Finally, remember to write an answer.
Find out what * * * is and add it. (+)
Find out what is left, what is left, how much is left, and work it out by subtraction. (-)
X. Understanding RMB
1 yuan = 10 angle 1 angle = 10 point 1 yuan = 100 point.
Eleven, know the location
Head up, feet down, chest, back, left hand press, right hand write, walk up and down the stairs to the right, the position can't be wrong!
Twelve, add and subtract column vertical
Numbers are aligned, first (digits) and then ten (digits). Write addition and subtraction, and then calculate the value.
Thirteen,
1, minimum digits 1, minimum digits 10, maximum digits 9.
2. The starting point on the ruler is indicated by 0.
3. How to find the adjacent number: this number adds 1, and this number subtracts 1, and the result is its adjacent number.
4. Find the number before subtracting 1 and the number after adding 1.
5. Add 0 to any number to get this number, and subtract 0 from any number to get this number.
One addend remains the same, the other addend increases by several, and the sum also increases by several;
One addend remains the same, the other addend is reduced by a few, and the sum is also reduced by a few.
6. Two identical numbers are subtracted, and the difference is 0.
7. The minuend is a constant, and the greater the minuend, the smaller the difference; The minuend is a constant, and the smaller the minuend, the greater the difference.
A complete set of formulas that must be memorized in primary school mathematics 3. 1. Calculation formulas of geometric perimeter, area and volume of primary school mathematics.
The circumference of a rectangle = (length+width) ×2 C=(a+b)×2.
Circumference of a square = side length ×4 C=4a
Area of rectangle = length× width S=ab
Area of a square = side length × side length s = a.a = a.
Area of triangle = base × height ÷2 S=ah÷2.
Area of parallelogram = base × height S=ah
Trapezoidal area = (upper bottom+lower bottom) × height ÷2 S=(a+b)h÷2.
Diameter = radius ×2 d=2r Radius = diameter ÷2 r= d÷2.
Circumference = π× diameter = π× radius× 2c = π d = 2π r
Area of circle = π× radius× radius
Area of triangle = base × height ÷2. The formula S= a×h÷2.
Square area = side length × side length formula S= a×a
Area of rectangle = length× width Formula S= a×b
Area of parallelogram = base× height Formula S= a×h
Trapezoidal area = (upper bottom+lower bottom) × height ÷2 Formula S=(a+b)h÷2
Sum of internal angles: sum of internal angles of triangle = 180 degrees.
Cuboid volume = length× width× height formula: V=abh
Volume of cuboid (or cube) = bottom area × height formula: V=abh.
Volume of cube = side length × side length × side length formula: V=aaa.
Circumference = diameter × π formula: L=πd=2πr
Area of circle = radius × radius× π formula: S=πr2.
Surface (side) area of cylinder: The surface (side) area of cylinder is equal to the perimeter of bottom multiplied by height. Formula: S=ch=πdh=2πrh.
Surface area of a cylinder: the surface area of a cylinder is equal to the perimeter of the bottom multiplied by the height plus the area of the circles at both ends. Formula: S=ch+2s=ch+2πr2.
Volume of cylinder: the volume of cylinder is equal to the bottom area multiplied by the height. Formula: V=Sh
Volume of cone = 1/3 bottom× product height. Formula: V= 1/3Sh.
Law of fractional addition and subtraction: Fractions with the same denominator are added and subtracted, only the numerator is added and subtracted, and the denominator remains the same. Add and subtract fractions with different denominators, divide first, then add and subtract.
Multiplication of fractions: use the product of molecules as numerator and the product of denominator as denominator.
The law of division of fractions: dividing by a number equals multiplying the reciprocal of this number.
Second, the unit conversion
(1)1km =1km =1000m1m =10 decimeter1decimeter =10 cm/kloc.
(2) 1 m2 = 100 square decimeter 1 square decimeter = 100 square centimeter 1 square centimeter = 100 square millimeter.
(3) 1 m3 = 1000 cubic decimeter 1 cubic decimeter = 1000 cubic centimeter 1 cubic centimeter = 1000 cubic millimeter.
(4)1t =1000 kg1kg =1000 mg =1kg = 2 kg.
(5) 1 hectare = 1 ten thousand square meters 1 mu =666.666 square meters.
(6) 1 liter = 1 cubic decimeter = 1000 ml 1 ml = 1 cubic centimeter.
(7) 1 yuan = 10 angle 1 angle = 10 point 1 yuan = 100 point.
(8) 1 century = 100 1 year =1February (3 1 day):1357810/2.
February 28th in a normal year and February 29th in a leap year: 365 days in a normal year and 366 days in a leap year: 1 =24 hours: 1 =60 minutes.
1 minute =60 seconds 1 hour =3600 seconds.
Third, the calculation formula of quantitative relationship
1, number of copies × number of copies = total number of copies/number of copies = total number of copies/number of copies = number of copies.
2. 1 multiple× multiple = multiple1multiple = multiple/multiple = 1 multiple
3. Speed × time = distance/speed = time/distance/time = speed.
4. Unit price × quantity = total price ÷ unit price = total quantity ÷ quantity = unit price
5. Work efficiency × working hours = total workload ÷ work efficiency = working hours ÷ total workload ÷ working hours = work efficiency.
6. Appendix+Appendix = sum, and-one addend = another addend.
7. Minus-Minus = Minus-Minus = Minus+Minus = Minus
8. Factor × factor = product ÷ one factor = another factor.
9. Dividend/Divider = quotient dividend/quotient = divisor quotient × divisor = dividend 69