Tag: properties of addition and subtraction of integers

Addition is associative for integers
$i.e. (a + b) + c = a + (b + c)$
$\therefore [(-12) + (-15)] + (-5) = (-12) + [(-15) + (-5)]$

$(-5) \times [(-8)\times 2] = (-5)\times (2\times (-8))$ (commutative property)
$= [(-5)\times 2] \times (-8)$ (associative property)
$= (-10) \times (-8)$
$= 80$
(Here, we used various properties to skip $(-5)\times (-8)$ which could have been time consuming).

The statements is false.