Question

evaluate 3.5x4.5 using expansion formula?

Plz solve this I will 50 thx to your answer if your answer is right

Answer 1

Answer:

$\rm{3.5\cdot \:4.5=15.75}$

Step-by-step explanation:

$\rm{3.5\cdot \:4.5}$

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

$\rm{\frac{\begin{matrix}\space\space&\space\space&3&5\\ \space\space&\times \:&4&5\end{matrix}}{\begin{matrix}0&1&7&5\\ 1&4&0&0\end{matrix}}}$

$\rm{=1575}$

$3.5\mathrm{\:has\:}1\mathrm{\:decimal\:place}$

$4.5\mathrm{\:has\:}1\mathrm{\:decimal\:place}$

$\longrightarrow\mathrm{Therefore,\:the\:answer\:has\:}2\mathrm{\:decimal\:places}$

$\rm{=15.75}$

Answer 2

$Question:-$

Evaluate 3.5x4.5 using expansion formula?

$Answer:-$

3.5 x 4.5

=15.75

Multiply without the decimal point, then put the decimal point in the answer.

                                       3.5

                                    x 4.5

                                 ______

                                  0 1 7 5

                               + 1 4 0 0

                                 ______

                                  1 5 7 5

                                 ______

→3.5 has 1 decimal place

→4.5 has 1 decimal place

⇒ There fore, the answer has 2 decimal places = 15.75