ALEX Classroom Resource

Students:

• When given word problems involving multiplicative comparison, will solve using concrete, pictorial representations, and write related equations involving a single unknown.

Example: There are 12 children and 3 adults at the playground. How many times as many children are at the playground than adults? Represent the situation with the equation 12 = n × 3 and a tape diagram with a total of 12 and groups of 3, repeating each group 4 times to solve.

Students know:

• how to find products and quotients.
• Recognize situations represented by multiplicative comparison.
• Distinguish between multiplicative comparison and additive comparison.

Students are able to:

• Solve word problems involving multiplicative comparison.
• Write equations using a symbol for the unknown to represent word problems involving multiplicative comparison.
• Use drawings to represent the word situation involving multiplicative comparison.

Students understand that:

• additive comparison focuses on the difference between two quantities and multiplicative comparison focuses on one quantity being some number times larger than another.

Learning Objectives:
M.4.2.1: 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.
M.4.2.2: Recognize key terms to solve word problems.
Examples: in all, how much, how many, in each.
M.4.2.3: Apply properties of operations as strategies to add.
M.4.2.4: Recall basic multiplication facts.
M.4.2.5: Demonstrate computational fluency, including quick recall of addition and subtraction facts.