216k views
2 votes
Why is the quotient of three divided by one-fifth different from the quotient of one-fifth divided by three? Hello my child needs help with this question could someone help

1 Answer

3 votes

Solution

We want to get why


\frac{3}{\text{ \lparen1/5\rparen}}\text{ is different from }\frac{\text{ \lparen1/5\rparen}}{3}

Reason 1: Commutation Law Does Not Hold For Division (or quotient)

Generally,


(a)/(b)\\e(b)/(a)

Reason 2: Actual Computation

First


\begin{gathered} \frac{3}{\text{ \lparen1/5\rparen}}=3/(1)/(5) \\ \\ \frac{3}{\text{ \lparen1/5\rparen}}=3*(5)/(1) \\ \\ \frac{3}{\text{ \lparen1/5\rparen}}=15 \end{gathered}

Secondly


\begin{gathered} \frac{\text{ \lparen1/5\rparen}}{3}=(1)/(5)/3 \\ \\ \frac{\text{ \lparen1/5\rparen}}{3}=(1)/(5)*(1)/(3) \\ \\ \frac{\text{ \lparen1/5\rparen}}{3}=(1)/(15) \end{gathered}

It is now obvious that


\frac{3}{\text{ \lparen1/5\rparen}}\\e\frac{\text{ \lparen1/5\rparen}}{3}

User Jpmc
by
3.2k points