Ryder used front-end estimation to estimate the product of (–24.98)(–1.29). What was his estimate?

Question

–32
–20
20
32

Answer 1

To use front-end estimation for the product of (–24.98)(–1.29), we focus on the leading digits of each number:

1. For –24.98, we round to –20 (the front-end digit is 20, and we ignore the decimals).
2. For –1.29, we round to –1 (again taking only the front-end digit).

Now, we multiply the estimates:

\[ (-20) \times (-1) = 20 \]

Therefore, Ryder's estimate would be 20.