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The mathematical formula of the sixth grade of primary school and the education version of the master of knowledge should be negative.
Commonly used quantitative relations

1, number of copies × number of copies = total number of copies/number of copies = total number of copies/number of copies = number of copies.

2. 1 multiple× multiple = multiple1multiple = multiple/multiple = 1 multiple

3. Speed × time = distance/speed = time/distance/time = speed

4. Unit price × quantity = total price ÷ unit price = total quantity ÷ quantity = unit price

5. Work efficiency × working hours = total workload ÷ work efficiency = working hours ÷ total workload ÷ working hours = work efficiency.

6. Appendix+Appendix = sum, and-one addend = another addend.

7. Minus-Minus = Minus-Minus = Minus+Minus = Minus

8. Factor × factor = product ÷ one factor = another factor.

9. Dividend = quotient dividend = divisor quotient × divisor = dividend

Calculation formula of mathematical graphics in primary schools

1, square (c: perimeter s: area a: side length)

Perimeter = side length ×4 C=4a

Area = side length × side length S=a×a

2. Cube (V: volume A: side length)

Surface area = 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)

Circumference = (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 = bottom × height ÷2 s=ah÷2

Height of triangle = area ×2÷ base of triangle = area ×2÷ height

6. parallelogram (s: area a: bottom h: height)

Area = bottom × 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 л d= diameter r= radius)

(1) perimeter = diameter× л = 2×л× radius C=лd=2лr

(2) area = radius × radius× л

9. Cylinder (V: volume H: height S: bottom area R: bottom radius C: bottom circumference)

(1) lateral area = bottom perimeter × height =ch(2лr or лd) (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

1 1, total number of copies/total number of copies = average.

12, the formula of sum and difference problem

(sum+difference) ÷ 2 = large number (sum-difference) ÷ 2 = decimal.

13 and the question of time

Sum ÷ (multiple-1) = decimal × multiple = large number (or sum-decimal = large number)

14, differential time problem

Difference ÷ (multiple-1) = decimal × multiple = large number (or decimal+difference = large number)

15, encountered a problem.

Meeting distance = speed × meeting time

Meeting time = meeting distance/speed and

Speed Sum = Meeting Distance/Meeting Time

16, concentration problem

Solute weight+solvent weight = solution weight.

The weight of solute/solution × 100% = concentration.

Solution weight × concentration = solute weight

Solute weight-concentration = solution weight.

17, profit and discount

Profit = selling price-cost

Profit rate = profit/cost × 100% = (selling price/cost-1) × 100%.

Up and down amount = principal × up and down percentage

Interest = principal × interest rate× time

After-tax interest = principal × interest rate × time × (1-20%)

Universal unit conversion

Length unit conversion

1 km =1000m1m =1decimeter/decimeter =10cm1m =10cm/kloc-.

Area unit conversion

1 square kilometer = 100 hectare 1 hectare = 10000 square meter 1 square meter = 100 square decimeter.

1 dm2 = 100 cm2 1 cm2 = 100 mm2

Volume (volume) unit conversion

1 m3 = 1000 cubic decimeter 1 cubic decimeter = 1000 cubic centimeter 1 cubic decimeter = 1 liter.

1 cm3 = 1 ml 1 m3 = 1000 liter

Weight unit conversion

1t = 1000kg 1kg = 1000g 1kg = 1kg。

Rmb unit conversion

1 yuan = 10 angle 1 angle = 10 point 1 yuan = 100 point.

Time unit conversion

1 century = 100 1 year =1February (3 1 day) has:1\ 3 \ 5 \ 7 \ 8 \1.

February 28th in a normal year and February 29th in a leap year: 365 days in a normal year and 366 days in a leap year: 1 =24 hours.

1 hour = 60min 1 minute = 60s 1 hour = 3600s.