and
conjunction
used in calculations for showing that numbers are added together
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adverb
used in front of a number or amount to state that it should be taken away from another number or amount that you have just mentioned
verb
used in mathematics for saying that you are imagining that something is true, usually in order to prove a principle of mathematics
adjective
used in mathematics for showing that you are taking one number from another. This word is usually represented by the symbol 
adjective
used for showing that one number or amount is added to another. This word is usually represented in mathematics by +
noun
used in mathematics for saying how many times you multiply a number by itself. For example ‘10 to the power of 3’ means 10x10x10.
used for saying how a number is calculated

… a teaching method in which groups of children learn independently using a computer linked to the internet
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Open Dictionary
a derogatory word used for referring to people in the banking and investment industry who are thought of as taking serious risks in order to increase their own earnings …
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