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MATH 111 (8)

# Chapter 2

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School
McGill University
Department
Mathematics & Statistics (Sci)
Course
MATH 111
Professor
Semester
Winter

Description
MATH 111 – Winter 2012 2: WHOLE NUMBER AND THEIR OPERATIONS - natural number: = {1, 2, 3, 4, 5…} - whole number : = {0, 1, 2, 3, 4, 5…} 2.1 Addition and Subtraction of Whole Numbers 2.1.1 Addition of Whole Numbers addition of whole number: let A and B be two disjoint finite sets. if n(A) = a and n(B) = b, then a + b = n (A ∪ B); may also be represented in a number line less than: for any whole number a and b, a is less than b, written a < b, if, and only if, there exists a natural number k, such that a + k = b - equalities can be combined with inequalities greater than (>), less than (
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