Primary school mathematics formula and its conversion 1. Formula: 1. Perimeter of square = side length ×4 ① area of square = side length× side length 2S positive = a× A3 side length of square = area ÷ side length 4A positive = S÷A perimeter of rectangle = (length+width) × 2 ① rectangular area = length× width 2S length = A× area of a corner = bottom× height ÷. A three = S× 2 ÷ h (4) Height of three shapes = area × 2 ÷ bottom ψH three = S× 2 ÷Aψ product = (upper bottom+lower bottom) × height ÷ 2 (1) S ladder = (a Upper bottom of trapezoid = area ×2÷ lower bottom of trapezoid = area × 2 ÷ height-upper bottom (6) ladder b = S × 2 ÷ H-A [6] distance = speed × number of roots+number of roots) ÷2 unit conversion: (/kloc- Decimeter [6] 1 decimeter square = 100 cm2 [7] 1 cm2 = 10000 mm2 [8] 1 decimeter = 1 0000 m2 Basic formula: (/. 8. Diameter of a circle = radius of a circle ×2 d=r×2=2r 9, radius of a circle = diameter× 2r = d ÷ 210, circumference of a circle =πd 1 1, and diameter of a circle = circumference of a circle ÷. Radius = circumference ÷2÷πR = c÷2÷π 13, area of circle = π× square of radius S=π×r2 14. Cylinder surface area = Side area+two bottom areas s cylinder table = s side +2π R2 15. Cylinder volume = bottom area× height V-cone = S× H 16. The volume of the cone = × bottom area × = scale distance ÷ scale = real distance × scale = map distance 1. Other uom-> metric system: fill in the number of nonstandard uom in the text input box on the left side of the formula, such as "1", and select the unit from the nonstandard uom drop-down menu on the left side of the formula, such as "point"; Select the unit in the metric unit of measurement drop-down menu on the right side of the equation, such as "kilogram", and click "Other->; Metric button, that is, you get "0.4536" kg in the text input box on the right side of the equation. 2. Metric-> Other UOM system: fill in the number of metric UOM in the text input box on the right side of the equation, such as "1", and select the unit from the drop-down menu of metric UOM on the right side of the equation, such as "kg"; Select a unit from the drop-down menu of nonstandard units of measurement on the left side of the equation, such as "point", and click "Metric->"; Other "button, that is, in the equation on the left side of the text input box to get" 2.205 "point. 3. Conversion between other units of measurement: for example, calculate the relationship between "city Jin" and "pound". Enter "1" in the text input box on the left side of the equation, select "Gold" in the drop-down menu on the left side, and click "Other->; Metric "button, and then select points from the drop-down menu at the side of Equation-> >, and click Metric->; Other "button, that is, 1 kg is equivalent to" 1. 102 "pound. 4. Conversion between metric units: for example, calculate the relationship between "kilogram" and "gram". Enter "1" in the text input box on the right of the equation, select "kg" in the drop-down menu on the right, select "kg" (or other effective units) in the drop-down menu on the left, click "Metric-> Other" button to get "2 kg", then select "gram" in the drop-down menu on the right and click "Other->; Metric button, that is, 1 kg is equivalent to "1000" grams. Metrology table * English to metric * Metric to English length unit: 1 inch =25.4 mm 1 foot = 12 inch = 0.3048 m 1 yard =3 feet =0.9654. 38+044 m 1 (legal) miles = 1760 code = 1.609 km 1 nautical mile = 1852 m 2 measurement area unit: 1 square inch =6. 45 square centimeters square centimeters 1 square feet = 144 square inches =9.29 square decimeter square decimeter 1 square yard =9 square feet =0.836 square meters 1 acre = 4,840 square yards. Square yard =0.405 hectare 1 square mile square mile =640 acres = 259 hectares cubic hectare Ch cubic inch = 16.4 cubic centimeter cubic centimeter 1 cubic foot = 1728 cubic inch =0.0283 cubic meter 1 cubic yard = 765 cubic meters Volume unit: English 1 pint =20 liquid ounces. Liquid ounces =34.68 cubic inches = 0.568 liters 1 quart =2 pints. Pint = 1. 136 liters 1 gallon =4 quarts = 4.546 liters 1 gram =2 gallons = 9.092 liters 1 bushel = 4 grams. Peck =36.4 liters 1.25 eight bushels =8 bushels =2.9 1 hectolitres of American dry 1 pint pint =33.60 cubic inches = 0.550 liters. 1 quart =2 pints = 1. 1 liter1gram =8 quarts =8.8 1 liter1bushel =4. Es liter American liquid American liquid 1 pint = 16 liquid ounces. Liquid ounces =28.88 cubic inches = 0.473 liter 1 quart quart =2 pints = 0.946 liter 654. 38+0 gallon Galen =4 quarts Quart = 3.785 liters L Constant weight unit: 1 grain = 0.065g 1 drum Dylan =1.772g 1 oun. Oz = 16 dram = 28.35g 1 lb = 16 oz =7000 grains = 0.4536kg 1 yingshi = 14 lb = 6.35g Orton Short Ton (US Ton). Kloc-0/.0 16 metric ton Length Unit: 1 mm =0.03937 inch 1 cm = 10 mm.mm = 0.3937 inch 1 cm = 3.937 inch/Kloc. Decmeter = 1.0936 code =3.2808 feet 1. M 1 0m = 1 0m.m = 1 0.936 code1100m 100m = 109.4 code1km =/kloc-. Kloc-0/852m m = 1Cm =0.06 1 cubic inch cubic inch 1 cubic meter = 1.308 cubic yard cubic yard capacity measurement volume 1 ml ml =0.002 pint (UK). British pint 1 cm = 10/0ml. ML =0.0 18 pints 1 deciliter = 10 centiliter. Ciliter =0. 176 pints 1 liter = 65438. . Deciliter = 1.76 pint 1 1L = 1 0L =2.20 gallons 1 10L =100L =2.75 bushels110L. Kg = 1000 l. L =3.44 Eight-fourths bushel weight unit: 1 mg =0.0 15 valley 1 leather = 10 mg. Mg = 0. 154 grains. N valley 1 decigram = 10 cg. Ricks = 1.543 valley 1 gram = 10 dg. Decgram = 15.43 valley 1 Decgram 10g =65438. 64 Dram Dram 1 100 grams = 100 grams. g =3.527 ounces 1 kg = 1000 grams. g =2.205 pounds 1 ton (metric tons), tonnage = Kg =0.984 (long) ton, British ton = 1. 1023 short ton, American ton.

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