two numbers with a product of 1 are called elements
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In any addition problem, such as 1 + 2 = 3, the numbers 1 and 2 are called addends. The total is called the sum.
reciprocals, multiplicative inverses
Two numbers: the first of them is 1 and the second is not!Two numbers: the first of them is 1 and the second is not!Two numbers: the first of them is 1 and the second is not!Two numbers: the first of them is 1 and the second is not!
A number which has only two factors is called a prime number. Prime numbers from 1 to 10 are 2,3,5 and 7.
3 minuend - 2 subtrahend 1 difference