Question
To solve 18 x 20
239
likes1193 views
Answer to a math question To solve 18 x 20
Corbin
4.6107 Answers
Multiply the top number by the bolded digit of the bottom number
$\begin{matrix}\:\:&\bold{1}&\bold{8}\\\times &2&\bold{0}\end{matrix}$
Mutliply the bold numbers $8\times 0=0$
$\frac{\begin{matrix}\:\:&1&\bold{8}\\\times &2&\bold{0}\end{matrix}}{\begin{matrix}\:\:&\:\:&0\end{matrix}}$
Mutliply the bold numbers $1\times 0=0$
$\frac{\begin{matrix}\:\:&\bold{1}&8\\\times &2&\bold{0}\end{matrix}}{\begin{matrix}\:\:&0&0\end{matrix}}$
Multiply the top number by the bolded digit of the bottom number
$\frac{\begin{matrix}\:\:&\bold{1}&\bold{8}\\\times &\bold{2}&0\end{matrix}}{\begin{matrix}\:\:&0&0\end{matrix}}$
Mutliply the bold numbers $8\times 2=16$
$\frac{\begin{matrix}\:\:&\:\:&1&\:\:\\\:\:&\:\:&1&\bold{8}\\\:\:&\times &\bold{2}&0\end{matrix}}{\begin{matrix}\:\:&\:\:&0&0\\\:\:&\:\:&6&\:\:\end{matrix}}$
Add the carried number to the multiplication $1+1\times 2=3$
$\frac{\begin{matrix}\:\:&\:\:&\bold{1}&\:\:\\\:\:&\:\:&\bold{1}&8\\\:\:&\times &\bold{2}&0\end{matrix}}{\begin{matrix}\:\:&\:\:&0&0\\\:\:&3&6&\:\:\end{matrix}}$
Add the rows to get the answer. For simplicity, fill in trailing zeros
$\frac{\begin{matrix}\:\:&\:\:&1&8\\\:\:&\times &2&0\end{matrix}}{\begin{matrix}\:\:&0&0&0\\\:\:&3&6&0\end{matrix}}$
Line up the numbers
$\begin{matrix}\:\:&1&8\\\times &2&0\end{matrix}$
$=360$
Frequently asked questions (FAQs)
Question: What is the square root of 64? Is it a positive or negative value?
+
What is the equation of a hyperbola with foci at (3,0) and (-3,0), and vertices at (5,0) and (-5,0)?
+
What is the perimeter of a triangle with sides measuring 5, 12, and 9 units?
+
New questions in Mathematics