Answer:
The question is given below as
[tex]81.9\times4.6[/tex]Concept:
We will estimate first and then multiply
Step 1:
81.9 is closer to 80 than it is closer to 90(to the nearest tens)
[tex]81.9\text{ rounds down to 80}[/tex]Step 2:
4.6 is closer to 5 than it is closer to 4(to the nearest unit)
[tex]4.6\text{ rounds up to 5}[/tex]Step 3:
Multip[ly the two estimates
[tex]\begin{gathered} =80\times5 \\ =400 \end{gathered}[/tex]Hence,
The final answer is = 400
OPTION B is the right answer
