Florida B.E.S.T. MA.5.GR.2

MA.5.GR.2 is a B.E.S.T. standard. These are the benchmarks under it.

• MA.5.GR.2.1

  Find the perimeter and area of a rectangle with fractional or decimal side lengths using visual models and formulas.

01

What Students Need to Do

Students use side lengths written as fractions or decimals to calculate the distance around a rectangle and the space inside it. They distinguish linear units from square units.

02

What Mastery Looks Like

Students choose the correct operation, calculate accurately, and simplify fractions or place decimals correctly. They label perimeter with linear units and area with square units.

03

Common Misconceptions

Students may multiply for both measures or add only one length and one width for the boundary. They may misplace decimal points, mishandle unlike denominators, or use square units for perimeter.

04

How to Assess It

Exit ticket: A rectangular garden is 3.5 meters long and 2 1/4 meters wide. Find its perimeter and area, and label each answer with units.

1. 01

   Give pairs rulers and grid paper to draw a 3.5 cm by 2.5 cm rectangle, then calculate its boundary and covered space.

2. 02

   Ask students to explain why multiplying the side lengths does not give the distance around a rectangle.

3. 03

   Play a card match game connecting rectangle dimensions to the correct perimeter and area cards.

4. 04

   Have students estimate flooring and baseboard needed for a rectangular room with decimal dimensions, then compare the two costs.

• MA.4.GR.2

  Solve problems involving the perimeter and area of rectangles.

• MA.3.GR.2

  Solve problems involving the perimeter and area of rectangles.

• MA.4.GR.2.1

  Solve perimeter and area mathematical and real-world problems, including problems with unknown sides, for rectangles with whole-number side lengths.