Answer all the questions below and press submit to see how many you got right.
Denominator : The denominator of a fraction $\frac{a}{b}$ is the number $b$ below the fraction bar.
Fraction : A fraction is a number that can be written as $\frac{a}{b}$ with an integer $a$ and a natural numbers $b.$ A fraction $\frac{a}{b}$ is the result of the division $a\div b.$ Examples of fractions are $\frac{1}{2}, -\frac{2}{3}$ and $\frac{3}{2}.$
Multiplication : Multiplication is the mathematical operation that is a shorthand for adding the same amount several times. For example $3\cdot 4=4+4+4=12.$
Number : A number $x$ is a mathematical symbol representing a quantity.
Numerator : The numerator of a fraction $\frac{a}{b}$ is the number $a$ above the fraction bar.
Whole number : A whole number is any of the numbers $0,1,2,\ldots.$
$10\cdot \frac{5}{15}=\frac{?}{15}$
$\frac{2}{2}\cdot\frac{6}{10}=\frac{?}{20}$
Unit fraction : A unit fraction is a fraction of the form $\frac{1}{n}$ for a natural number $n$. Examples of unit fractions are $\frac{1}{2}$ and $\frac{1}{23}.$
$9\cdot \frac{1}{14}=\frac{?}{14}$