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Content and data of mathematical handwritten newspaper
Mathematical geometry formula of primary school
Volume calculation formula:
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 x side length s = a.a = A2
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× 2d = 2r
Radius = diameter ÷2 r=d÷2
Circumference = π× diameter = π× radius× 2 = π d = 2π r
Area of circle = π× radius× radius
Area of triangle = base × height ÷2 S=a×h÷2.
Area of a square = side length × side length s = a× a.
Area of rectangle = length× width S=a×b
Area of parallelogram = base× height S=a×h
Trapezoidal area = (upper bottom+lower bottom) × height ÷2 S=(a+b)h÷2.
Sum of internal angles: sum of internal angles of triangle = 180 degrees.
Volume of cuboid = length× width× height V=abc
Volume of cuboid (or cube) = bottom area × height V=Sh
Volume of cube = side length × side length × side length V=aaa
Circumference = diameter× π l = π d = 2π r
Area of circle = radius× radius× π s = π R2
Surface (side) area of cylinder: The surface (side) area of cylinder is equal to the perimeter of bottom multiplied by height.
S=ch=πdh=2πrh
Surface area of cylinder: the surface area of cylinder is equal to the perimeter of the bottom multiplied by the height plus the area of the circles at both ends.
S=ch+2s=ch+2πr2
Volume of cylinder: the volume of cylinder is equal to the bottom area multiplied by the height.
V=Sh
The volume of the cone = 1/3 bottom area × height.
V= 1/3Sh
Law of fractional addition and subtraction:
Add and subtract fractions with the same denominator, only add and subtract numerators, and the denominator remains the same.
Fractions of different denominators are added and subtracted, first divided, then added and subtracted.
The multiplication of fractions is:
Use the product of molecules as numerator and the product of denominator as denominator.
Law of division of fractions:
Dividing by a number is equal to multiplying the reciprocal of this number.
Universal 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 =365 days (average year), 366 days (leap year) 1 day =24 hours 1 hour =60 minutes =3600 seconds/kloc.
Primary quantitative relation formula
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
Semantic formula of propositional logic
According to the semantic inference rules of predicate logic, semantics should be consistent, that is, for a propositional logic statement set F, if and only if there is an explanation that at least all elements of F are true under I, then F is semantically consistent. In propositional logic semantics, an assignment cannot give a propositional atomic formula both truth and false. In propositional logic semantics, under the same interpretation, a set cannot belong to both the extension of a predicate and the extension of this predicate.
Content and data of mathematical handwritten newspaper
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