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Section 1
An Introduction to the Integers
Simplify: $|-23|$
Simplify: $13+28$.
Simplify: $-12+(-21)$.
Simplify: $12+(-29)$.
Simplify: $32+(-90)$.
Simplify: $-11-15$.
Simplify: $-18-(-54)$.
Simplify: $(-18)(-5)$.
Simplify: $(-19)(3)$.
Simplify: $(-2)^{2}$.
Simplify: $(-2)^{5}$.
Use the graphing calculator to evaluate $(-225)^{3}$.