Question

estimate.
$78.8 \times 6.8 \approx$
choose 1 answer:
a 56
b 560
c 5600
d 56,000

Explanation:

Step1: Round the numbers

Round \( 78.8 \) to \( 80 \) (since \( 78.8 \) is close to \( 80 \)) and round \( 6.8 \) to \( 7 \) (since \( 6.8 \) is close to \( 7 \)).

Step2: Multiply the rounded numbers

Calculate \( 80\times7 \). Using the multiplication rule, \( 80\times7 = 560 \).

Answer:

B. 560