Maths - Number | Mapa Mental

Maths - Number

Square, cube, triangle and prime numbers
1. Xsquared = X*X
2. Xcubed = X*X*X
3. Triangle number = 1+2, 1+2+3 ect.
4. Prime number = only two factors
Factor Trees
1. Venn Diagram
  1. HCF = Product of overlapping numbers
  2. LCM = Product of all numbers
2. Product of prime factors e.g. 2sqaured * 3cubed
Percent, fraction and decimal
1. 23/100 = 0.23 = 23%
2. 0.1 rec = 1/9 0.12 rec = 12/99
Fractions
1. Adding and subtracting - Find common denominator, Add/subtract numerators
2. Multiplying - Multiply numerator and donominator
3. Divide - Skip flip and multiply
Ratio
1. 50 to 1:4 = 10:40
Percentage increase/deacrease
1. Per inc - 1+per inc
2. Per dec - 1-per dec
Surds
1. Treat like algebra
2. 1/root2
  1. *root2
    1. root2/2
Bounds
1. Upper bound of 21 (2s.f) =21.5
2. Lower bound of 21 (2 s.f) = 20.5
3. UB = UB+UB UB*UB UB-LB UB/LB
4. LB = LB+LB LB*LB LB-UB LB/UB
Reciprocals
1. Flip fraction upside down
Compound interest
1. X.* (IR+1)to the power of years of interest
Proportion
1. Direct Y=kx
2. Indirect Y = k/x
Rules of indices
1. Negative indices - Power of denominator - reciprocal
2. Fraction - root denominator to the power of numerator

Maths - Number

	Creado por walkr121 hace más de 11 años