abacus
noun
an object used for counting or doing simple calculations, consisting of a frame with small balls in a row
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noun
an object used for counting or doing simple calculations, consisting of a frame with small balls in a row
noun
a set of rules for solving problems or doing calculations, especially rules that a computer uses
noun
an amount that is calculated by adding several numbers together and dividing the total by the original number of things you added together
noun
in mathematics, an expression that has two parts connected by the sign + or the sign –, for example 2x + 3y or x – 12
noun
the counting of numbers backwards, for example from ten to zero, before something important happens
noun
a position that comes after the decimal point in a decimal. 0.0164 has four decimal places
noun
the difference between one number or measurement in a series and the average of all the numbers or measurements in the series
noun
a calculation in mathematics of how many times a number is contained in a larger number
noun
a small number or letter written above and to the right of another number to show how many times you should multiply that number by itself
noun
a calculation of the size, value, or amount of something when all the facts are not available to you
noun
in mathematics, the number of times that a number must be multiplied by itself in order to produce a particular number
noun
the study or use of numbers and shapes to calculate, represent, or describe things. Mathematics includes arithmetic, geometry, and algebra
noun
an arrangement of numbers or symbols in a pattern from top to bottom and from left to right, used for solving problems in mathematics
noun
a list that shows the results of multiplying all the combinations of two numbers between 1 and 12 together
noun
a set of written signs or shapes that are used in something such as music or mathematics
noun
a calculation of the way that something will change and develop in the future, especially of how fast it will grow or become smaller
noun
a problem or statement in mathematics or logic that must be solved or proved true or false
noun
an equation in which a variable (=quantity that can represent different amounts) is multiplied by itself once only
noun
a letter representing a number that can change depending on the other numbers in an equation
adjective
adverb
noun
adjective
if one mathematical quantity is a function of another, it changes according to how the second quantity changes
the amount by which a number or calculation may be different from the correct one without causing a problem

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an expandable stick which you attach to a mobile phone or camera to help you take a selfie …
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