MATH: Topic 4 Assessment

Select each equation that the number 10³ makes true.

• 0.79 × □ = 790

• 6.3 × □ = 6,300

• 0.023 × □ = 23

• 14.5 × □ = 1,450

What is the area of a square painting with each side measuring 9.5 inches?

• 90.25 square inches

• 19 square inches

• 28.5 square inches

• 47 square inches

Choose the correct product for 7.02 x 10³.

• 7.02

• 7,020

• 70.2

• 0.702

Find the exact total area of carpet needed for 4 offices, each with a floor of 7.2 feet long and 5.8 feet wide.

• 166.4 square feet

• 167.04 square feet

• 168.4 square feet

• 169.6 square feet

Compare your estimate to the exact answer. Why is your answer reasonable?

• The estimate is close to the exact answer.

• The estimate is much higher than the exact answer.

• The estimate is much lower than the exact answer.

• The estimate is not related to the exact answer.

If the length of the office is rounded to 7 feet and the width to 6 feet, what is the estimated area for one office?

• 40 square feet

• 42 square feet

• 44 square feet

• 46 square feet

What is the reasonableness of the estimate if the exact area is 166.4 square feet and the estimated area is 168 square feet?

• The estimate is reasonable.

• The estimate is not reasonable.

• The estimate is too high.

• The estimate is too low.

Why is it important to compare estimates with exact calculations?

• To ensure accuracy

• To save time

• To avoid mistakes

• To make work easier.

How much will 5 balloons cost if each balloon costs $2.19?

• $14.95

• $10.95

• $12.95

• $15.95

Mathematical Equivalence

ON

Answer explanation

If you don't know how to multiply decimals just take the decimals out and multiply 72x35. Once you get your answer put the decimals back into the problem & count your decimal digits (numbers after the decimal point). Then just move your decimal that number of places to the left from the answer tat you got.

Tags

6.NS.2