Multiply 531.7 and 9 together. Round to the nearest hundredth when necessary. Answer:

Mathematics

2 answers:

vfiekz [6]2 years ago

7 0

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Answer:

47853

Step-by-step explanation:

$\mathrm{Multiply\:without\:the\:decimal\:points,\:then\:put\:the\:decimal\:point\:in\:the\:answer}$

$Line\;up\;the\;numbers$

$\begin{matrix}\:\:&5&3&1&7\\ \times \:&\:\:&\:\:&\:\:&9\end{matrix}$

$multiply\;the\;top\;number\;by\;the\;bottom\;number\;one\;digit\;at\;a\\\;time\;starting\;with\;the\;ones\;digit$

$multiply\;the\;bold\;number:7*9=63$

$\mathrm{Carry\:}6\mathrm{\:to\:the\:column\:on\:the\:left\:and\:write\:}3\mathrm{\:in\:the\:result\:line}$

$\frac{\begin{matrix}\:\:&\:\:&\:\:&6&\:\:\\ \:\:&5&3&1&\textbf{7}\\ \times \:&\:\:&\:\:&\:\:&\textbf{9}\end{matrix}}{\begin{matrix}\:\:&\:\:&\:\:&\:\:&3\end{matrix}}$

$Add\; the \;carried \;number\;to\;the\;multiplication:6+1*9=15$

$\mathrm{Carry\:}1\mathrm{\:to\:the\:column\:on\:the\:left\:and\:write\:}5\mathrm{\:in\:the\:result\:line}$

$\frac{\begin{matrix}\:\:&\:\:&1&\textbf{6}&\:\:\\ \:\:&5&3&\textbf{1}&7\\ \times \:&\:\:&\:\:&\:\:&\textbf{9}\end{matrix}}{\begin{matrix}\:\:&\:\:&\:\:&5&3\end{matrix}}$

$Add\; the \;carried \;number\;to\;the\;multiplication:1+3*9=28$

$\mathrm{Carry\:}2\mathrm{\:to\:the\:column\:on\:the\:left\:and\:write\:}8\mathrm{\:in\:the\:result\:line}$

$\frac{\begin{matrix}\:\:&2&\textbf{1}&6&\:\:\\ \:\:&5&\textbf{3}&1&7\\ \times \:&\:\:&\:\:&\:\:&\textbf{9}\end{matrix}}{\begin{matrix}\:\:&\:\:&8&5&3\end{matrix}}$

$Add\; the \;carried \;number\;to\;the\;multiplication:2+5*9=47$

$\mathrm{Carry\:}4\mathrm{\:to\:the\:column\:on\:the\:left\:and\:write\:}7\mathrm{\:in\:the\:result\:line}$

$\frac{\begin{matrix}\:\:&4&\textbf{2}&1&6&\:\:\\ \:\:&\:\:&\textbf{5}&3&1&7\\ \times \:&\:\:&\:\:&\:\:&\:\:&\textbf{9}\end{matrix}}{\begin{matrix}\:\:&\:\:&7&8&5&3\end{matrix}}$