Question

What is the value of 2.84 × 3.9? A) 3.408 B) 11.076 C) 34.08 D) 110.76

Answer 1

How to get answer by Mimiwhatsup:

$Multiply\:without\:the\:decimal\:points,\:then\:put\:the\:decimal\:point\:in\:the\:answer\\284\times \:39\\Line\:up\:the\:numbers\\\begin{matrix}\space\space&2&8&4\\ \mathrm{x}&\space\space&3&9\end{matrix}$

Multiply the top number by the bottom number one digit at a time starting with the ones digit (from left to right)

$Multiply\:the\:top\:number\:by\:the\:bolded\:digit\:of\:the\:bottom\:number\\\begin{matrix}\space\space&\textbf{2}&\textbf{8}&\textbf{4}\\ \mathrm{x}&\space\space&3&\textbf{9}\end{matrix}\\\mathrm{Mutliply\:the\:bold\:numbers}:\quad \:4\times \:9=36\\\mathrm{Carry\:}3\mathrm{\:to\:the\:column\:on\:the\:left\:and\:write\:}6\mathrm{\:in\:the\:result\:line}$

$\frac{\begin{matrix}\space\space&\space\space&3&\space\space\\ \space\space&2&8&\textbf{4}\\ \mathrm{x}&\space\space&3&\textbf{9}\end{matrix}}{\begin{matrix}\space\space&\space\space&\space\space&6\end{matrix}}\\\mathrm{Add\:the\:carried\:number\:to\:the\:multiplication}:\quad \:3+8\times \:9=75\\\mathrm{Carry\:}7\mathrm{\:to\:the\:column\:on\:the\:left\:and\:write\:}5\mathrm{\:in\:the\:result\:line}$

Repeat the same steps and multiply and carry the numbers then add them to get an answer of: 11.076

Answer 2

The correct answer is D hope this helps