What is the best estimate for 81.9 x 4.6?A.100B.360C.400D.8,000

Question

asked Sep 7, 2023 101k views

1 Answer

GreW · Answer 1 · 2023-09-11T15:24:59+0000

Answer:

The question is given below as

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)

$81.9\text{ rounds down to 80}$

Step 2:

4.6 is closer to 5 than it is closer to 4(to the nearest unit)

$4.6\text{ rounds up to 5}$

Step 3:

Multip[ly the two estimates

$\begin{gathered} =80*5 \\ =400 \end{gathered}$

Hence,

The final answer is = 400

OPTION B is the right answer