cardinal number (n)
/ˈkɑrdnəl ˈnʌmbər/

a number, such as 1, 2, and 3, used to show quantity rather than order

ordinal number (n)
/ˈɔrdnəl ˈnʌmbər/

a number that refers to the position of something in a series, for example “first,” “second,” etc.

decimal (a)
/ˈdɛsəml/

based on or counted in tens or tenths

fraction (n)
/ˈfræk.ʃən/

a division or part of a whole number, for example ½ or ¾

percentage (n)
/pəˈsen.tɪdʒ/

an amount of something, often expressed as a number out of 100

arithmetic (n)
/əˈrɪθməˌtɪk/

the type of mathematics that deals with numbers

divide (v)
/dəˈvaɪd/

to find out how many times one number is contained in another

plus (prep)
/plʌs/

used when the two numbers or amounts mentioned are being added together

minus (prep)
/ˈmaɪnəs/

used when you subtract one number or thing from another one

multiply (prep)
/ˈmʌltəˌplaɪ/

to add a number to itself a particular number of times

equal (a)
/ˈikwəl/

the same in size, quantity, value, etc. as something else

total (n)
/ˈtoʊt̮l/

the amount that you get when you add several numbers or things together

dozen (n)
/ˈdʌzn/

a group of twelve of the same thing

around (r)
/əˈraʊnd/

approximately

zero (n)
/ˈzɪroʊ/

the number 0

hundred (n)
/ˈhʌn.drəd/

the number 100

thousand (n)
/ˈθaʊznd/

the number 1,000

million (n)
/ˈmɪl.jən/

the number 1,000,000

billion (n)
/ˈbɪl·jən/

1,000,000,000; one thousand million

half (n)
/hæf/

one of two equal parts of a divisible whole