Question

1. a dollhouse has 15.15 square feet downstairs and 6.25 square feet upstairs. which of the following is the best estimate of the total area in the dollhouse?

a 9 square feet
b 21 square feet
c 78 square feet
d 90 square feet

Explanation:

Step1: Identify areas to add

We need to add the downstairs area ($15.15$ square - feet) and the upstairs area ($6.25$ square - feet) to find the total area.

Step2: Perform addition

$15.15+6.25 = 21.4$ square - feet.

Step3: Find the best estimate

$21.4$ is closest to $21$ square - feet among the given options.

Answer:

B. 21 square feet