multiple n.倍數(a number that contains a smaller number,an exact number of times)
【例】 20 is a multiple of 5.
multiply v.乘；增加(to increase by a large amount)
【例】 Children will learn to multiply in the second grade.
【派】 multiplier(n.乘數)
natural number 自然數
negative number 負數
number vt.達，總計
【例】 The population of the town numbered about 5,000.
number lines數軸
numerator n.(分數的)分子(the number above the line in a fraction)
【例】 5 is the numerator in 56.
numerical adj.數字的，用數字表示的，數值的(expressed or considered in numbers)
【例】 Make sure the files are organized in numerical order.
【派】 numerically(adv.數字上)
obtuse angle 鈍角
octagon n.八邊形，八角形
odd number 奇數
ordinate n.縱坐標
parallel lines 平行線
parallelogram n.平行四邊形
parameter n.參數；【物】參量
pentagon n.五邊形；五角大樓(美國國防部)
perimeter n.周長(the whole length of the border around an area or shape)；周邊，邊緣
permutation n.排列，序列(one of the different ways in which a number of things can be arranged)；互換
【例】 a sandwich shop that sells every possible permutation of meat and bread
perpendicular adj.垂直的(vertical)，成直角的；直立的
【例】 a road perpendicular to the highway
【派】 ｐerpendicularly(adv.直立地)
plane n.平麵
plus n.加號 adj.正的 prep.(運算中)加(add)
【例】 Three plus six equals nine.
polygon n.多邊形，多角形(a flat shape with three or more sides)
【派】 polygonal(adj.多邊形的)
positive number 正數
power n.次方，乘方
【例】 How much is the sixth power of nine?
prime factor 質因數
prime number 質數
product n.乘積
proper fraction 真分數
pyramid n.棱錐，角錐；金字塔
quadrant n.象限，四分體
quadratic adj.二次的 n.二次方程式
quadrilateral adj.四邊(形)的 n.四邊形
quadruple adj.四倍的，四邊組成的 n.四倍數 v.(使)成四倍(to increase and become four times)
【例】 The company has quadrupled its profits in just three years.
quotient n.商，商數
radial adj.光線的；半徑的；沿半徑轉動的
【例】 radial roads leading out of the city center
radius n.半徑(距離)(the distance from the center to the edge of a circle)
ratio n.比例，比率
【例】 The ratio of nursing staff to doctors is 2:1.