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?
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?
