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What is the best estimate for 7.8 x 37.86?A.46B.50C.300D.400

User Sunwukung
by
7.3k points

1 Answer

2 votes

We can round both numbers to the nearest integer, therefore


\begin{gathered} 7.8\rightarrow8 \\ 37.86\rightarrow38 \end{gathered}

Therefore


\begin{gathered} 7.8\cdot37.86\approx8\cdot38 \\ \end{gathered}

And


8\cdot38=304

Therefore 7.8 x 37.86 is something near 300. The correct answer is the letter C.

User Satoshi Nakajima
by
7.6k points
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