In order to make it easier for primary school students to recite and memorize the conversion of primary school length units, I have compiled the conversion table of primary school length units for your reference!

The most commonly used length units in the conversion formula of common length units in primary schools are kilometers (km), meters (m), decimeters (dm), centimeters (cm) and millimeters (mm), and the conversion relationship between them is as follows:

1 km (km) = 1 000m (m),1m (m)= 10 decimeter (dm).

1 km (km)= 1000 m =10000 decimeter (dm)= 1000 0 cm (cm) = 100000 mm (mm).

1 m = 10 decimeter (decimeter) = 100 cm (cm) = 1000 mm (mm)

1 decimeter (decimeter) =10cm = 100 mm (mm)

1 cm =10mm.

Elementary school mathematics encyclopedia 1 commonly used conversion formula, area unit conversion.

1 km2 = 100 hectare

1 ha = 1 10,000 m2

1 m2 = 100 square decimeter

1 square decimeter = 100 square centimeter

1 cm2 = 100 mm2

2, the body (volume) product unit conversion

1 m3 = 1000 cubic decimeter

1 cubic decimeter = 1000 cubic centimeter

1 cubic decimeter = 1 liter

1 cm3 = 1 ml

1 m3 = 1000 liter

3, weight unit conversion

1 ton = 1000 kg

1 kg =1000g

1 kg = 1 kg

4. RMB unit conversion

1 yuan = 10 angle.

1 angle = 10 point

1 yuan = 100 integral.

5. Time unit conversion

1 century = 100 1 year =65438+ February.

The big month (3 1 day) is: 13578 1065438+ February.

Abortion (30 days) includes: 469 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.

1 century = 100 year; * 1 year = average number of years of 365 days; * One year =366 days leap year

January, Wednesday, Friday, July, August, October and December are big months, with 3 1 day.

Four, six, nine and eleven are abortions. Abortion lasts for 30 days.

There are 28 days in February in a normal year and 29 days in February in a leap year.

1 day = 24 hours * 1 hour =60 minutes * 1 minute =60 seconds.

6, geometric shape perimeter area volume calculation formula

1, the perimeter of the rectangle = (length+width) ×2C=(a+b)×2.

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

3. Area of rectangle = length× width S=ab

4. Square area = side length x side length s = a.a = a.

5. Area of triangle = base × height ÷2S=ah÷2.

6. parallelogram area = bottom x height S=ah

7. trapezoidal area = (upper bottom+lower bottom) × height ÷2S=(a+b)h÷2.

8. Diameter = Radius× 2D = 2r Radius = Diameter ÷2r=d÷2

9. The circumference of a circle = π× diameter = π× radius× 2c = π d = 2π r.

10, area of circle = π× radius× radius.