Question

use partial quotients to find 90 ÷ 5. 90 ÷ 5 =? is related to 5 ×? = 90. find the first partial quotient. choose the number you can multiply by 5 to get as close as possible to 90 without going over. then write the product. 5×? =?

Explanation:

Step1: Recall multiplication - division relationship

We know that division and multiplication are inverse operations. If \(a\div b = c\), then \(b\times c=a\). Here, we have \(90\div5\) and we need to find the number such that \(5\times? = 90\).

Step2: Find the quotient

We start by considering multiples of 5. \(5\times10 = 50\), \(5\times15=75\), \(5\times18 = 90\). So the first - partial quotient (and in this case the whole quotient) when dividing 90 by 5 is 18.

Answer:

18