Tag: properties of integer multiplication

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Multiple choice maths the integers properties of integer multiplication properties of addition and subtraction of integers propertie of integers

Simplify using associative property:
$(-5) \times [(-8) \times 2] =$  $....$

  1. $40$
  2. $-80$
  3. $80$
  4. $-40$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$(-5) \times [(-8)\times 2] = (-5)\times (2\times (-8))$ (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).