(−2) + (−5) + (−6) ____ (−3) + (−4) + (−6)
(−2) + (−5) + (−6) = (−3) + (−4) + (−6)
Think: Adding a negative number moves left on the number line.
Left side
\((-2) + (-5) = -7\)
\(-7 + (-6) = -13\)
Right side
\((-3) + (-4) = -7\)
\(-7 + (-6) = -13\)
Compare
\(-13 = -13\)
So, both sides are equal.