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excellence #1: dividing fractions/ mixed numbers show all work & circle…

Question

excellence #1: dividing fractions/ mixed numbers
show all work & circle your final answer.
directions: use the algorithm to find the quotients below. be sure to rewrite each quotient that is an improper fraction as a mixed number. be sure to check each problem.

a. $\frac{5}{3} div \frac{3}{4}$
b. $\frac{8}{3} div 4$
c. $4 div \frac{8}{3}$
d. $1\frac{1}{3} div \frac{3}{4}$
e. $2\frac{1}{8} div 1\frac{2}{9}$
f. $\frac{1}{4} div 2\frac{2}{3}$
g. $\frac{2}{3} div \frac{3}{4}$
h. $2\frac{3}{5} div 2\frac{1}{2}$
i. $\frac{3}{4} div 3\frac{2}{5}$

Explanation:

Part a: $\boldsymbol{\frac{2}{3} \div \frac{3}{4}}$

Step1: Recall division of fractions rule

To divide fractions, multiply the first fraction by the reciprocal of the second fraction. The reciprocal of $\frac{3}{4}$ is $\frac{4}{3}$. So, $\frac{2}{3} \div \frac{3}{4}=\frac{2}{3} \times \frac{4}{3}$.

Step2: Multiply the numerators and denominators

Multiply the numerators: $2\times4 = 8$. Multiply the denominators: $3\times3=9$. So, $\frac{2}{3} \times \frac{4}{3}=\frac{8}{9}$.

Step1: Rewrite the whole number as a fraction

The whole number $4$ can be written as $\frac{4}{1}$. The reciprocal of $\frac{4}{1}$ is $\frac{1}{4}$. So, $\frac{8}{3} \div 4=\frac{8}{3} \times \frac{1}{4}$.

Step2: Multiply and simplify

Multiply the numerators: $8\times1 = 8$. Multiply the denominators: $3\times4 = 12$. Then simplify $\frac{8}{12}$ by dividing numerator and denominator by their greatest common divisor, which is $4$. $\frac{8\div4}{12\div4}=\frac{2}{3}$.

Step1: Rewrite the whole number as a fraction and find reciprocal

Rewrite $4$ as $\frac{4}{1}$. The reciprocal of $\frac{8}{3}$ is $\frac{3}{8}$. So, $4\div\frac{8}{3}=\frac{4}{1} \times \frac{3}{8}$.

Step2: Multiply and simplify

Multiply the numerators: $4\times3 = 12$. Multiply the denominators: $1\times8 = 8$. Then simplify $\frac{12}{8}$ by dividing numerator and denominator by their greatest common divisor, which is $4$. $\frac{12\div4}{8\div4}=\frac{3}{2}$. Convert the improper fraction $\frac{3}{2}$ to a mixed number: $\frac{3}{2}=1\frac{1}{2}$.

Answer:

$\boxed{\frac{8}{9}}$

Part b: $\boldsymbol{\frac{8}{3} \div 4}$