QuestionYour friend multiplied $20$ and $15$ first in $20 \times(15 \times 14)$. What property is this and why?

Studdy Solution
In this case, your friend grouped20 and15 together first, and then multiplied the result by14. According to the associative property, this should give the same result as if you had grouped15 and14 together first, and then multiplied the result by20$$(20 \times15) \times14 =20 \times (15 \times14)$$So, the property used by your friend is the associative property of multiplication. This property is useful because it allows us to change the grouping of numbers in a multiplication operation without changing the result, which can sometimes make the calculation easier.