900 ha = () km2 3 square kilometers = () hectares = () square meters

900 ha = () km2 3 square kilometers = () hectares = () square meters

900 hectares = 9 square kilometers
3 square kilometers = 300 hectares = 3000000 square meters

Conversion of physical units
The negative second power of 1.3.5 times 10 mm = m
2.0.503um= m
3.530dm= m
4.3.5 × 10 negative quadratic nm = m
5.4.3 × 10 negative quartic cm = um
6.5.6 × 10 cubic mm = M = NM
7.0.0045um= m= dm
8.4500cm= m= um

Because 1 mm = 10 negative third power, so 3.5 times 10 negative second power, mm = 3.5 × 10 negative fifth power, m1um = 10 negative sixth power, so 0.503um = 5.03 × 10 negative seventh power, m1dm = 0.1M, so 530dm = 53m1nm = 10 negative ninth power, so 3.5 × 10 negative second power, NM = 3.5 × 10 negative eleventh power, m1cm = 10 mm, 1 mm

Conversion of all area units

The conversion relation of area unit is as follows: 1 square centimeter = 100 square millimeter 1 square decimeter = 100 square centimeter 1 square meter = 100 square decimeter 1 square meter = 10000 square centimeter 1 square meter = 1000000 square millimeter 1 hectare = 10000 square meter 1 square kilometer = 100 hectare = 1000000 square meter 1 square kilometer = 10

Conversion of area units and mass units for primary school grades 1 to 5

The unit of measurement and classification of primary school mathematics quantity
(1) Length measurement unit and advance rate: kilometer (kilometer), meter, decimeter, centimeter, millimeter
1km = LKM, 1km = 1000m, LM = LDM, 1dm = LCM, LCM: 10mm
(2) Area measurement unit and rate: square kilometer, hectare, square meter, square decimeter, square centimeter
1 square kilometer = 100 hectares 1 square kilometer = 1000000 square meters
1 hectare = 10000 square meters 1 square meter = 10.0 square decimeters
1 square decimeter = 100 square centimeter
(3) Volume measurement: cubic meter, cubic decimeter, cubic centimeter, liter, milliliter
L cubic meter = 1000 cubic decimeter 1 cubic decimeter = 1000 cubic centimeter
L cubic decimeter = l liter, 1 cubic centimeter = l ml
(4) Quality unit and rate: ton, kilogram, kilogram, gram
1 ton = 1 000 kg 1 kg = 1 kg 1 kg = 1 000 G
(5) Time unit and rate: century, year, month, day, hour, minute, second
1 century = 100 years, 1 year = 12 months (31 day months are January, March, may, July, August, October and December, 30 day months are April, June, September and November, 28 day in normal year, 29 day in wet year) 1 day = 24 hours, 1 hour = 60 minutes, 1 minute = 60 seconds
1000 μ M = 1 mm
10 mm = 1 cm
10 cm = 1 decimeter
10 decimeters = 1 meter
1000 = 1m km = 1km
1000 g = 1 kg = 1 kg
2kg = 1kg
100 ms = 1 second
60 seconds = 1 minute
15 minutes = 15 minutes
60 minutes = 1 hour
24 hours = 1 day
30 days = January
December = 1 year

20 questions on conversion of volume unit and area unit

Area conversion: 1 square kilometer (km2) = 100 hectare (HA) = 247.1 acre (acre) = 0.386 square mile (mile2) 1 square meter (M2) = 10.764 square foot (ft2) 1 square inch (in2) = 6.452 square centimeter (cm2) 1 hectare (HA) = 10000 square meter (M2) = 2.471 acre (AC

Find 20 junior high school physics unit conversion exercises with answers

Unit conversion topic!
How many square meters is 2.5 square millimeter

2.5 sq mm = 0.025 sq cm = 0.00025 sq decimeter = 0.0000025 sq m

Some unit conversion problems
1m3= dm3= cm3= mm3?
1m3= L?

1m3=103dm3 1dm3=10-3m3
1m3=106cm3 1cm3=10-6m3
1m3=109mm3 1mm3 =10-9m3
1dm3=103cm3 1cm3=10-3dm3
1cm3=103mm3 1mm3=10-3cm3
1m3=1000L 1L =10-3 m3
1L=1dm3 1mL=1cm3 1L=103mL

How much m is 0.9nm?
How much cm is 0.9nm?
How many mm is 0.9nm?
It's going to be a negative power of 10~
There are three questions

0.0000000009m

1. Xiao Hong read a book, 335 pages on the first day, one fifth of the whole book on the second day, and 25 pages left. How many pages did she read on the second day
2. Cut off a rope 17.5. Just cut off five sixth of the rope. If you want to leave two seventh of the rope, how many meters should you cut off

1. The first day + the rest is: 335 + 25 = 360, accounting for 1-1 / 5 = 4 / 5360 △ 4 / 5 = 450450 × 1 / 5 = 90 of the whole book
2.17.5 △ 5 / 6 = 21 (m) - total length
21 × (1-2 / 7) = 15 (m)