Welcome to Mrs. Salisbury's 3rd Grade Class
  • Grade 3 Room 8
  • All About Math
    • Unit 1 >
      • 1.1 Number System
      • 1.2 Introduction to Fractions
      • 1.3 Fractions on a Number Line and a Line Plot
      • 1.4 Introduction to Multiplication
    • Unit 2 >
      • 2.1 Measurement—Time and Mass
      • 2.2 Equivalent Fractions
      • 2.3 Using Commutative and Distributive Properties
      • 2.4 Relationships Between Multiplication and Division
    • Unit 3 >
      • 3.1 Multiplication and Division Problem Solving
      • 3.2 Measurement—Plane Figures: Area and Attributes
      • 3.3 Measurement—Area, Including Problem Solving
    • Unit 4 >
      • 4.1 Measurement—Liquid Volume
      • 4.2 Picture Graphs and Bar Graphs
      • 4.3 Perimeter of Polygons
      • 4.4 Addition and Subtraction to 1,000
      • 4.5 Multiplication and Division Fluency Within 100
    • Math Icons
  • All About Science
    • Unit 3 & 4
    • unit 5 >
      • unit 6 >
        • Unit 7
  • All About Social Studies
    • Communities- Rural, Urban & Suburban
    • Citizens- Rules/Laws
    • Mapping Skills/Geographic Features
    • RI Native Americans
    • U. S. Government
    • Study of Rhode Island/Cranston Long Ago
  • websites
  • Writing Standards Grade 3
    • WRITING gr. 3 quarter 1 >
      • Quarter 2
      • Quarter 3
      • Quarter 4
  • Projects page

3.3 Measurement—Area, Including Problem Solving

Geometric measurement: understand concepts of area and relate area to multiplication and to addition.

Measurement and Data 3.MD

3.MD.6   Measure areas by counting unit squares (square cm, square m, square in, square ft, and improvised units).
Counting squares for area-click here
area of figures made of unit squares-click here
Area-square units and rectangles video-click here
3.MD.7   Relate area to the operations of multiplication and addition.

b. Multiply side lengths to find areas of rectangles with whole-number side lengths in the context of solving real world and mathematical problems, and represent whole-number products as rectangular areas in mathematical reasoning.

d. Recognize area as additive. Find areas of rectilinear figures by decomposing them into non-overlapping rectangles and adding the areas of the non-overlapping parts, applying this technique to solve real world problems.

Operations and Algebraic Thinking 3.OA

Represent and solve problems involving multiplication and division.

3.OA.3 Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.1

Essential questions

• How do you find the area of a rectangle using square units?

• How can you find the area of a shape made up of multiple polygons having right angles?

• How can you use multiplication or addition to solve problems involving area?

• How can you solve a multiplication problem with a symbol representing an unknown number?



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