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What are the mathematical formulas?
A complete collection of commonly used formulas in primary school mathematics (geometric calculation formula)

1. Perimeter of rectangle = (length+width) ×2

Formula: C=(a+b)×2

2. The circumference of a square = side length ×4

Formula: C=4a

3. Area of rectangle = length × width

Formula: S=ab

4. Square area = side length × side length

Formula: S=a*a

5. Area of triangle = base × height ÷2

Formula: S=ah÷2

6. Area of parallelogram = base × height

Formula: S=ah

7. Trapezoidal area = (upper bottom+lower bottom) × height ÷2

Formula: s = (a+b) h ÷ 2

8. Diameter of circle = radius ×2

Formula: d=2r

9. Radius of a circle = diameter ÷2

Formula: r= d÷2

10. The circumference of a circle = π× diameter = π× radius× 2.

Formula: c=πd =2πr

1 1. Area of circle = π× radius× radius.

Formula: S=πr?

12. cuboid volume = length× width× height

Formula: V=abh

13. cuboid (or cube) volume = bottom area × height

Formula: V=S bottom area h

14. Volume of cube = side length × side length × side length

Formula: V=a?

15. The side area of the cylinder = the circumference of the bottom × the height.

Formula: S=C bottom h = π DH = 2π RH.

16. Surface area of cylinder = perimeter of bottom × height+area of circles on both sides.

Formula: S=Ch+2S=Ch+2πr?

17. Volume of cylinder = bottom area × height

Formula: V=Sh

18. The volume of the cone =? Bottom area × height

Formula: V=? hush

Complete set of commonly used formulas in primary school mathematics (unit conversion table)

1. Length unit conversion

1 km =1km1km =1000m1m =10 decimeter1decimeter =10cm/kloc-.

2. Area unit conversion

1 m2 = 100 square decimeter 1 square decimeter = 100 square centimeter

1 cm2 = 100 mm2

3. Volume (volume) unit conversion

1 m3 = 1000 cubic decimeter

1 cubic centimeter = 1000 cubic millimeter 1 liter = 1 cubic decimeter = 1000 ml.

1 ml = 1 cm3

4. Conversion of weight units

1t = 1000kg 1kg = 1000mg = 1kg。

5. RMB unit conversion

1 yuan = 10 angle 1 angle = 10 point 1 yuan = 100 point.

6. Time unit conversion

1 century = 100 1 year =65438+ February.

The big month (3 1 day) includes:1\ 3 \ 5 \ 7 \ 8 \10 \ 65438+February.

Abortion (30 days) includes: April \ June \ September \165438+1October.

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.