Commonly used quantitative relations
1, number of copies × number of copies = total number of copies, total number of copies/number of copies = number of copies, total number of copies/number of copies = number of copies.
2.65438 multiple +0 × multiple = multiple, multiple ÷ 1 = multiple, multiple ÷ multiple = 1.
3. Speed × time = distance, distance/speed = time, distance/time = speed.
4. Unit price × quantity = total price, total price/unit price = quantity, total price/quantity = unit price.
5. Work efficiency × working hours = total workload, total workload ÷ work efficiency = working hours, total workload ÷ working hours = work efficiency.
6. Appendix+Appendix = sum, and-one addend = another addend.
7. The minuend-subtrahend = difference, the minuend-difference = subtrahend, and the difference+subtrahend = minuend.
8, factor × factor = product, product ÷ one factor = another factor.
9. Divider = quotient, dividend = divisor, quotient × divisor = dividend.
Extended data:
Mathematical definition theorem formula
1 area of triangle = base × height ÷2. The formula S=a×h÷2.
2 square area = side length × side length formula S=a×a
3 area of rectangle = length× width formula S=a×b
4 area of parallelogram = base× height formula S=a×h
5 trapezoidal area = (upper bottom+lower bottom) × height ÷2 Formula S=(a+b)h÷2
6 sum of internal angles: sum of internal angles of triangle = 180 degrees.
7 cuboid volume = length× width× height formula: V=abh
8 cuboid (or cube) volume = bottom area × height formula: V=abh
9 Cubic volume = side length × side length × side length formula: V=aaa
10 circumference = diameter× π formula: L = π d = 2π r
1 1 area of circle = radius× radius× π formula: s = π R2.
12 surface area of the cylinder: the surface area of the cylinder is equal to the circumference of the bottom multiplied by the height. Formula: s = ch = π DH = 2π RH.
13 surface area of the cylinder: the surface area of the cylinder is equal to the perimeter of the bottom multiplied by the height plus the area of the circles at both ends. Formula: S=ch+2s=ch+2πr2.
14 volume of cylinder: the volume of cylinder is equal to the bottom area multiplied by the height. Formula: V=Sh
15 cone volume = 1/3 bottom × product height. Formula: V= 1/3Sh
16 law of adding and subtracting fractions: add and subtract fractions with denominator, only add and subtract numerators, and the denominator remains unchanged. Fractions of different denominators are added and subtracted, first divided, then added and subtracted.
Multiplication of 17 fraction: use the product of molecules as numerator and the product of denominator as denominator.
18? The law of division of fractions: dividing by a number is equal to multiplying the reciprocal of this number.