1 x number of shares per share = total number of shares ÷ number of shares = 2 1 multiple × multiple ÷ 1 multiple = multiple ÷ multiple = 1 multiple 3 speed × time = distance \ Working efficiency × working time = total workload ÷ working efficiency = working time ÷ total workload ÷ working time = working efficiency 6 addend+addend = sum-one addend = another addend 7 minuend-subtree = difference minuend-difference = subtree+subtree = minuend 8 factor × factor = product ÷. Square c perimeter s area a side length perimeter = side length× 4c = 4a area = side length× side length S=a×a 2 cubic v: volume a: side length surface area = side length× side length× 6s table =a×a×6 volume = side length× side length× side length V = A× A× side length. ×2 C=2(a+b) area = length× width S=ab 4 cuboid v: volume s: area a: length b: width h: high surface area (length× width+length× height+width× height) × 2s = 2 (ab+ah+BH). Volume = length × width × height V=abh 5 triangle s area a bottom h height area = bottom x height ÷2 s=ah÷2 triangle height = area x 2 ÷ bottom triangle bottom = area x 2 ÷ height 6 parallelogram s area a bottom h height area = bottom x height s=ah 7 trapezoid s area a top bottom b bottom. × h ∏ 2 8 circular S area C circumference ∏ d= diameter r= radius circumference = diameter×∏= 2×∏× radius C=∏d=2∏r area = radius× radius×∏ 9 cylinder V: volume H: height S; Bottom area R: bottom radius C: bottom circumference lateral area = bottom circumference× high surface area = lateral area+bottom area× 2 volume = bottom area× high volume = lateral area ÷2× radius 10 cone V: volume H: height S; Base area r: base radius volume = base area × height ÷3 Elementary school mathematical formula and difference problem formula (sum+difference) ÷ 2 = large number formula (sum-difference) ÷ 2 = decimal and multiple problem formula and ÷ (multiple-1) = decimal × multiple = large number (or The problem of planting trees on the non-closed line can be mainly divided into the following three situations: (1) If trees are planted at both ends of the non-closed line, Then: number of plants = number of segments+1 = total length ÷ plant spacing-1 total length = plant spacing × (number of plants-1) plant spacing = total length ÷ (number of plants-1) ⑵ If it is to be planted: number of plants. ÷ Difference between two distributions = number of shares participating in distribution (big profit-small profit) ÷ Difference between two distributions = number of shares participating in distribution (big loss-small loss) ÷ Difference between two distributions = number of shares participating in distribution formula. Encounter distance = speed and x encounter time = encounter distance ÷ the sum of speed and speed = encounter distance ÷ encounter time. The formula of catching up problem = speed difference × catching up time = catching up distance ÷ speed difference = catching up distance ÷ catching up time. Downstream problems. Hydrostatic velocity = (downstream velocity+countercurrent velocity) ÷2 Water flow velocity = (downstream velocity-countercurrent velocity) ÷2 Concentration problem formula: solute weight+solvent weight = solution weight ÷ solution weight × 100% = concentrated solution weight × concentration = solute weight ÷ concentration = solution weight; The formula of profit and discount problem: profit = selling price-cost profit rate = profit/cost × 65438. × 100% increase or decrease = principal× increase or decrease percentage discount = actual selling price ÷ original selling price× 1 00% (discount <1) interest = principal× interest rate× time after tax interest = principal× interest rate× time × (1-) Kloc-0/ multiple = multiple multiple multiple ÷ multiple = 1 multiple 3 speed× time = distance ÷ speed = time = total workload ÷ working efficiency = working time ÷ total workload ÷ working time = working efficiency 6 addend+addend = sum-one addend = other. Square c perimeter s area a side length perimeter = side length× 4c = 4a area = side length× side length S=a×a 2 cubic v: volume a: side length surface area = side length× side length× 6s table =a×a×6 volume = side length× side length× side length V=a×a×a 3. Area = length× width S=ab 4 cuboid V: volume S: area A: length B: width H: height (1) Surface area (length× width+length× height+width× height) ×2 S=2(ab+ah+bh) (2) Volume = length × width × height V=abh 5 triangle s area a bottom h height area = bottom x height ÷2 s=ah÷2 triangle height = area x 2 ÷ bottom triangle bottom = area x 2 ÷ height 6 parallelogram s area a x h ∏ 28 circle s area c circumference ∏. Bottom area r: bottom radius c: bottom perimeter (1) lateral area = bottom perimeter x height (2) surface area = lateral area+bottom area x 2 (3) volume = bottom area x height (4) volume = lateral area ÷ 2 x radius 10 cone v: volume h: height. Base area r: base radius volume = base area × height ÷3 Total number ÷ Total number = formula (sum+difference) ÷ 2 = large number (sum-difference) ÷ 2 = sum of decimal and multiple problems ÷ (multiple-1) = decimal × multiple. = Decimal Decimal × Multiple = Large Number (or Decimal+Difference = Large Number) Interviewee: zhengyi fan 94- Trainee Level 1 6-25 15:28 Primary school math formula: 1, rectangle perimeter = (length+width) ×2 C=(a+b)×2 2. Area of a square = side length × side length S=a.a= a 5, area of a triangle = bottom × height ÷2 S=ah÷2 6, area of a parallelogram = bottom × height S=ah 7, area of a trapezoid = (upper bottom+lower bottom) × height ÷ 2s = (a+). 8=πr 1 1, the surface area of a cuboid = (length× width+length× height+width× height )× 212, the volume of a cuboid = length× width× height V =abh 13, and the surface area of a cube = side. Lateral area of cylinder = circumference of bottom circle × height S=ch 16, surface area of cylinder = upper and lower bottom areas+lateral area s = 2π r+2π rh = 2π (d ÷ 2)+2π (d ÷ 2) h = 2π (c ÷ 2 ÷ π H 18, the volume of the cone = bottom area × height ÷ 3v = sh ÷ 3 = π r h ÷ 3 = π (d ÷ 2) h ÷ 3 = π (c ÷ 2 ÷ π) h ÷. . / Cubic v: volume a: surface area of side length = side length × side length× ×6 S table =a×a×6 volume = side length× side length V=a×a×a 3, rectangle c perimeter s area a side length perimeter = (length+width )× 2 c = 2 (a+b) area = length× width S. surface area. Volume = length × width × height V=abh 5 triangle s area a bottom h height area = bottom x height ÷2 s=ah÷2 triangle height = area x 2 ÷ bottom triangle bottom = area x 2 ÷ height 6 parallelogram s area a bottom h height x h ∏ 28 circular s area c circumference ∏. Bottom area r: bottom radius c: bottom perimeter (1) lateral area = bottom perimeter x height (2) surface area = lateral area+bottom area x 2 (3) volume = bottom area x height (4) volume = lateral area ÷ 2 x radius 10 cone v: volume h: height. Bottom area r: bottom radius volume = bottom area × height ÷3 Total number ÷ Total number = average sum and difference problem (sum+difference) ÷ 2 = large number (sum-difference) ÷ 2 = decimal and multiple problem ÷ (multiple-1) = decimal × multiple = planting trees. Then: number of plants = number of nodes+1 = total length ÷ plant spacing-1 = total length = plant spacing× (number of plants-1) plant spacing = total length \ then: number of plants = number of nodes = total length ÷ plant spacing = plant spacing. Then: number of plants = number of nodes-1 = total length ÷ spacing between plants-1 total length = spacing between plants × (number of plants+1) spacing between plants = total length ÷ (number of plants +0÷ difference between two distributions = number of shares participating in distribution (. Meeting distance = speed × meeting time = meeting distance; The sum of speed and speed = meeting distance; Meeting time; Catch up with the problem; Distance = catch up with time; Distance; Speed difference = catching distance; Catch up with time; Downstream speed = (downstream speed+countercurrent speed) ÷2 Water flow speed = (downstream speed-countercurrent speed) ÷2 Solute weight+solvent weight = solution weight ÷ solution weight × 100% = concentrated solution weight × concentration = solute weight ÷ concentration = solution weight profit and discount profit. × 100% increase or decrease = principal× increase or decrease percentage discount = actual selling price ÷ original selling price× 1 00% (discount < 1) interest = principal× interest rate× time after tax interest = principal× interest rate× time × (1-) Kloc-0/2 1 day =24 hours, 1 hour =60 minutes, 1 hour =60 seconds, 1 hour =3600 seconds, product = bottom area × height, V=Sh. Pick me. It's hard to fight.