Total copies/number of copies = number of copies
Total copies/number of copies = number of copies
1 multiple × multiple = multiple
Multiply1Multiply = Multiply
Multiply/Multiply = 1 Multiply
Speed × time = distance
Distance/speed = time
Distance/time = speed
Unit price × quantity = total price
Total price/unit price = quantity
Total price ÷ quantity = unit price
Work efficiency × working hours = total workload.
Total amount of work ÷ work efficiency = working hours
Total workload ÷ working time = working efficiency
Appendix+Appendix = Sum
And-one addend = another addend
Negative-negative = difference
Negative difference = negative
Difference+Minus = Minus
Factor × factor = product
Product ÷ One factor = another factor
Dividend = quotient
Dividend = divisor
Quotient × Divider = Divider
1 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: surface area of side length = side length × side length× ×6 S Table =a×a×6 volume = side length× 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=ab
4 cuboid v: volume s: area a: length b: width h: height (1) surface area (length× width+length× height+width× height )× 2s = 2 (AB+AH+BH) (2) volume = length× width× height V=abh.
5 triangle s area a base h height area = base x height ÷2 s=ah÷2 triangle height = area x 2 ÷ base triangle base = area x 2 ÷ height.
6 parallelogram s area a bottom h height area = bottom x height s=ah
7 trapezoid s area a upper bottom b lower bottom h height area = (upper bottom+lower bottom) × height ÷2 s=(a+b)× h÷2.
8 circle s area c perimeter ∏ d= diameter r= radius (1) perimeter = diameter x ∏ = 2 x ∏× radius c = ∏ d = 2 x r (2) area = radius x radius x ∏.
9 cylinder v: volume h: height s; Bottom area r: bottom radius c: bottom circumference (1) lateral area = bottom circumference× height (2) surface area = lateral area+bottom area× 2 (3) volume = bottom area× height (4) volume = lateral area ÷2× radius.
10 cone v: volume h: height s; Bottom area r: bottom radius volume = bottom area × height ÷3 Total number ÷ Total number of copies = average value.
(sum+difference) ÷ 2 = large number (sum-difference) ÷ 2 = decimal.
Sum ÷ (multiple-1) = decimal × multiple = large number (or sum-decimal = large number)
Difference ÷ (multiple-1) = decimal × multiple = large number (or decimal+difference = large number) elementary school olympiad formula
(sum+difference) ÷ 2 = large number (sum-difference) ÷ 2 = decimal.
Sum ÷ (multiple-1) = decimal × multiple = large number (or sum-decimal = large number)
Difference ÷ (multiple-1) = decimal × multiple = large number (or decimal+difference = large number)
1 The problem of planting trees on unclosed lines can be divided into the following three situations:
(1) If trees are to be planted at both ends of the non-closed line, then: number of plants = number of segments+1 = total length-1 = total length × (number of plants-1) = total length-(number of plants-1) (2) Then: number of plants = number of nodes = total length ÷ plant spacing = plant spacing × plant spacing = total length ÷ number of plants (3) If no trees are planted at both ends of the non-closed line, then: number of plants = number of nodes-1 = total length ÷ plant spacing-1 = plant spacing ×
The quantitative relationship of planting trees on the closed line is as follows: number of trees = number of segments = total length/plant spacing = plant spacing × number of trees = total length/plant spacing.
(profit+loss) ÷ Difference of two distributions = number of shares participating in distribution (big profit-small profit) ÷ Difference of two distributions = number of shares participating in distribution (big loss-small loss) ÷ Difference of two distributions = number of shares participating in distribution.
Meet distance = speed and x meet time = meet distance/sum of speed and speed = meet distance/meet time.
Catch-up distance = speed difference × catch-up time = catch-up distance ÷ speed difference speed difference = catch-up distance ÷ catch-up time
Downstream speed = still water speed+countercurrent speed = still water speed-water flow speed = (downstream speed+countercurrent speed) ÷2 Water flow speed = (downstream speed-countercurrent speed) ÷2
Solute weight+solvent weight = solution weight × 100% = concentrated solution weight× concentration = solute weight/concentration = solution weight.
Profit = selling price-cost profit rate = profit/cost×100% = (selling price/cost-1) × 100% fluctuation amount = principal× fluctuation percentage discount = actual selling price×100.
After-tax interest = principal × interest rate × time × (1-20%)