CCSS.Math.Content.3.OA.A

CCSS.Math.Content.3.OA.A is a cluster heading. These are the individual standards under it.

• CCSS.Math.Content.3.OA.A.1

  Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each.

• CCSS.Math.Content.3.OA.A.2

  Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 ...

• CCSS.Math.Content.3.OA.A.3

  Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawi...

• CCSS.Math.Content.3.OA.A.4

  Determine the unknown whole number in a multiplication or division equation relating three whole numbers.

01

What Students Need to Do

Students model situations with equal groups, arrays, drawings, and equations. They use multiplication or division to find a total, group size, number of groups, or missing factor.

02

What Mastery Looks Like

Given a word problem, students choose multiplication or division and write an equation with a symbol for the unknown. They solve within 100 and explain what the answer means in the situation.

03

Common Misconceptions

Students may add the two numbers instead of using equal groups. They may confuse the number of groups with the size of each group. Some rely on keywords instead of using the situation to choose an operation.

04

How to Assess It

Give this exit ticket: “Six bags hold 4 apples each. How many apples are there? If 8 apples go in each new bag, how many bags are needed?” Ask for a model and equation for each part.

1. 01

   Give pairs 24 counters and cups, then call out group sizes for students to build, sketch, and record with equations.

2. 02

   Ask students to explain how 5 groups of 6 and 30 divided into 5 equal groups describe the same quantities.

3. 03

   Play Missing Number Match with cards such as 7 × □ = 42, 42 ÷ 7 = □, and matching array pictures.

4. 04

   Use a classroom snack order to find totals, equal shares, and the number of packages needed for different group sizes.

• CCSS.Math.Content.2.OA.A

  Represent and solve problems involving addition and subtraction.

• CCSS.Math.Content.1.OA.A

  Represent and solve problems involving addition and subtraction.

• CCSS.Math.Content.5.NF.B.6

  Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem.