To divide a whole number by a unit fraction, we can multiply the whole number by the fraction's denominator.
So, to divide we multiply the by
And that's the answer! Notice that this method does the same job as the fraction model method we used before:
Divide
To divide a whole number by a unit fraction, we multiply the whole number by the fraction's denominator:
$5\div \dfrac{1}{2}=$
|
a
|
$\dfrac{1}{10}$ |
|
b
|
$3$ |
|
c
|
$\dfrac{5}{2}$ |
|
d
|
$10$ |
|
e
|
$7$ |
$16\div \dfrac{1}{3} =$
|
a
|
$\dfrac{1}{48}$ |
|
b
|
$13$ |
|
c
|
$48$ |
|
d
|
$\dfrac{16}{3}$ |
|
e
|
$19$ |
What is the value of
To divide a whole number by a unit fraction, we multiply the whole number by the fraction's denominator:
$2 \div \dfrac{1}{10} = $
|
a
|
$12$ |
|
b
|
$6$ |
|
c
|
$15$ |
|
d
|
$5$ |
|
e
|
$20$ |
$4 \div \dfrac{1}{11} =$
|
a
|
$\dfrac{11}{4}$ |
|
b
|
$\dfrac{4}{11}$ |
|
c
|
$44$ |
|
d
|
$22$ |
|
e
|
$15$ |
Johnny has kilograms of wheat flour with which he wants to make some pizzas. If each pizza needs of a kilogram of wheat flour, how many pizzas can Johnny make?
To determine the number of pizzas that Johnny can make, we divide the amount of wheat flour by the amount of wheat flour each pizza needs.
To divide a whole number by a unit fraction, we multiply the whole number by the fraction's denominator:
Therefore, Johnny can make pizzas.
Ana has $3$ kilograms of wheat flour with which she wants to make some cakes. If each cake needs $\dfrac{1}{2}$ of a kilogram of wheat flour, how many cakes can Ana make?
|
a
|
$5$ |
|
b
|
$7$ |
|
c
|
$10$ |
|
d
|
$8$ |
|
e
|
$6$ |
William is filling a $3$ liter bottle with water using a cup. How many cups of water does William need to use to fill the bottle if the capacity of one cup is $\dfrac{1}{6}$ of a liter?
|
a
|
$\dfrac{1}{2}$ |
|
b
|
$9$ |
|
c
|
$18$ |
|
d
|
$12$ |
|
e
|
$\dfrac{1}{18}$ |