Exam 13: Multiplication of Decimal Fractions

If one square foot of wall requires 4.50 firebricks, find the approximate number needed for 55 square feet.

0.173 x 0.132

Decimal fractions are multiplied in the same manner as whole numbers.

The number of decimal places to the right of the decimal point in the multiplier and the multiplicand are added. This total is the number of places to the right of the decimal point in the product.

Laying fiberglass roofing on an irregular roof is estimated to take 1.5 hours per square. How long will it take to lay 16.5 squares?

The material needed for a counter is estimated to be 75.5 board feet, at a cost of $2.00 per board foot. What is the total cost of the material?

2,000 x 0.356 feet

Multiply 4.25 x 1.50.

A builder drives 7.5 miles round-trip to and from a construction site. If 170 days are spent working on this house, what is the total mileage?

A carpenter can apply 100 square feet of bamboo flooring in 0.3 hour. How much time does it take to lay 700 square feet?