A complete set of conversion formulas and special training for primary school mathematics units

In the study of primary school mathematics, unit conversion runs through. Unit conversion in primary school mainly involves the conversion of length, area, volume, weight, RMB and time.

Because the conversion values are not uniform, many primary school students easily confuse these conversion values, which leads to mistakes in exams, loss of points, and sometimes jokes in life.

In this regard, the following decimal teacher will share the conversion formula of all primary school mathematics units, which is very complete, hoping to help children remember and avoid application errors.

Weight unit conversion

1 ton = 1000 kg? 1 ton =1000000g

Ton: Ton is the unit of weight, and in the metric system, one ton is equal to 65,438+0,000 kilograms; in the unit for calculating the volume of a ship, one ton is equal to 2.83 cubic meters (65,438+0,000 cubic feet).

1 kg = 1000 g？ 500g = 1 kg

Kilogram: gram (symbol kg or) is the basic unit to measure quality in the international system of units, and kilogram is also one of the most commonly used basic units in daily life. One kilogram is defined as the mass of the international kilogram original device, which is almost as heavy as one liter of water.

1 kg = 1 kg? 1 kg =2 kg

Kilogram, or kilogram (symbol kg or) is the basic unit to measure quality in the international system of units, and kilogram is also one of the most commonly used basic units in daily life.

Conversion between RMB units

Methods: RMB units have decimal relations.

1 yuan = 10 angle.

Yuan: monetary unit. RMB is the legal tender symbol of People's Republic of China (PRC) and Chinese mainland. The unit of RMB is Yuan, and the unit of RMB token is jiao and fen. The currency symbol of RMB is RMB, such as RMB 100, which can be written as RMB 100 (different from Japanese yen) or RMB 100.

1 angle = 10 point

Angle: monetary unit, one tenth of a yuan.

1 yuan = 100 integral.

Minute: monetary unit, one yuan 1%.

Time unit conversion

1 century = 100 year? 1 year = 12 months

Century: the unit for calculating years, with one hundred years as a century.

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

Big month: refers to the month with 3 1 day in the solar calendar (Gregorian calendar), and the seven months of Gregorian calendar, such as 1 month, March, May, July, August,1October and1February, are all big months, all of which are 3/kloc-0.

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

Abortion: refers to a month with 30 days in the solar calendar or 29 days in the lunar calendar.

February 28th in a normal year and February 29th in a leap year.

Average year: A year in which there is no leap day in the solar or lunar calendar, or a year in which there is no leap month in the solar or lunar calendar.

There are 365 days in a normal year and 366 days in a leap year.

Leap year: A year with a leap day in the solar or lunar calendar or a leap month in the lunar calendar.

1 day =24 hours 1 hour =60 minutes.

Day: A unit of time based on the earth's rotation period, equal to 86,400 seconds south latitude.

Minute: the auxiliary unit of time.

1 minute =60 seconds 1 hour =3600 seconds.

Seconds: the basic unit of time.

Length unit conversion

The most common length units are kilometers (km), meters (m), decimeters (dm), centimeters (cm) and millimeters (mm), and their conversion relationships are 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.

Area unit conversion

1 km2 = 100 hectare

Square kilometer: Square kilometer (symbol km2) is the metric unit of area, which is defined as "the area of a square with a side length of 1km".

1 ha = 1 10,000 m2

Hectare: The unit symbol of hectare is "hm2", where hm stands for 1 00m and hm2 stands for the square of100m (in English, square), that is, 10000 square hetometer, that is,1hectare.

1 m2 = 100 square decimeter

Square meter: Square meter is the metric unit of area. It is defined as the area of a square with a side length of 1 m. In life, square meters are usually referred to as "square meters" or "squares" for short. Hongkong and Taiwan Province are called "square meters".

1 square decimeter = 100 square centimeter

Square decimeter: Square decimeter (with the symbol d㎡) is the metric unit of area and is defined as "the area of a square with a side length of 1 decimeter".

1 cm2 = 100 mm2

Square millimeter: Square millimeter (with the symbol of mm ㎡ 2) is the metric unit of area, which is defined as "the area of a square with a side length of 1mm".

Volume conversion unit

Cubic meters; Cubic decimeter; cubic centimeter

Unit of volume: l; ML；

1 m3 = 1000 cubic decimeter; 1 cubic decimeter = 1000 cubic centimeter

1 l = 1000 ml; 1 liter? ; 1 ml = 1 cm3 1 m3 = 1000 cubic decimeter.

1 cubic decimeter = 1000 cubic centimeter; 1 cubic decimeter = 1 liter; 1 cm3 = 1 ml; 1 m3 = 1000 liter

Unit conversion exercise (1)

0. 15 kg =(？ ) gram?

3.00 1 ton = (? ) tons (? )kg

3.7 square decimeter = (? ) square millimeter

5.80 yuan = (? ) yuan (? ) angle

() decimeter =1.5m.

() tons () kilograms =4.08 tons.

5 10/0m = () km

5m 16cm = () m

5 kg 700 g = () kg

0.95m = () cm

4700 meters = () kilometers

3650g = () kg

40.06 tons = () kg

1.4m2 = () decimeter?

360 square meters = () hectares

7.05 m = () m () cm

5.45 kg =(？ )kg(？ ) gram

3 km 50 m = () km

() hours = 30 minutes

3 kg 500 g = () kg

() hours = 2: 45.

2.78 tons = () tons () kg?

0.25 hours = () minutes

504 cm = () meters

4.2m = () m () cm

10 meter 7 decimeter = () meter

0.06 km2 = () hectares

9 kg 750 g = () kg

8.04 tons = (? ) tons (? )kg

6.24 square meters = () square decimeter?

2050m = () km () m

4.6 tons = () kg

()㎡=750d㎡=( )c㎡

4650m=( )km？

52 hectares = (? ) square meters

3m3=( )dm3=( )cm3

6.3 kg = () grams

2.4 yuan = () when () points.

6.05 tons = () kg

1050g = () kg () g？

2. 15 hours = () hours () minutes

90 seconds = (? ) points

Unit conversion exercise (2)

230 square decimeter = (? ) square meters?

3.5 square kilometers = (? ) hectares

300 cubic decimeter = () cubic meters

60 mm = () cm

2 tons = () kg?

8 meters = () decimeter

5000 g = () kg？

3 kg = () grams

7 kilometers = () meters?

400 cm = () meters

6000 kg = () tons?

3 tons 500 kg = () kg

3600 km = () km () m

1 ton -320kg = () kg

7008kg = () tons () kg

4 m 7 cm = () cm

1 m-54 cm = () cm？

830g+170g = () g = () kg

4.05 cubic decimeter = () ml

1.5 hours = () minutes

1450ml = () l () ml

3.9 liters = () ml?

1.25 hours = () hours () minutes

8: 40 = ()

7040 kg = () tons () kg

6km40m=(？ ) kilometers

3 yuan 5 Angle = (? ) yuan

2.5 hectares = () square meters

8.05m3=( )dm3？

3.06m3=()？ m3( ) dm3

At three o'clock, 15 = ()?

285 seconds = () minutes

12 ton 60 kg = (? ) tons?

680ml = () L.

282 ml = () cubic centimeter?

0.04m = () cm = () mm.

3250 meters = (? ) kilometers (? ) meter

2? m330 dm3=( )m3

2.25 hours = () hours () minutes.

Unit conversion exercise (3)

Fill in the appropriate company name in ()

1. The height of the big tree is 17 ().

2. A kitten weighs 2 ().

The train runs at a speed of 78 miles per hour.

4. A tank weighs 6 ().

5. The key length is 60 ().

6. A pear weighs 320 ().

7. The floret is 130 ().

Choose the serial number of the correct answer and fill in ().

1. 1 small bag of jiaozi powder weighs 5 ().

① grams ② kilograms ③ tons

2. The width of the math textbook is 145 ().

① mm ② cm ③ decimeter

3. The carrying capacity of Huanghe brand car is 7 ().

① grams ② kilograms ③ tons

4. Wuhan Yangtze River Bridge is 5 102 () shorter than Nanjing Yangtze River Bridge.

① decimeter ② meter ③ kilometer

5. An egg weighs about 70 ().

① tons ② kilograms ③ grams

6. A pen is 14 ().

① Decimeter ② cm ③ mm

7.4 kilograms .04 kilometers. ()

① = ② < ③ Cannot be compared.

8. There are 22 steps between the two floors, and the height of each step is 15cm, rising from the first floor to the fourth floor ().

① 1320m②990cm③ 1320cm。