Georgia 2.NR.3

2.NR.3 is a Georgia mathematics standard. These are the expectations under it.

• 2.NR.3.1

  Determine whether a group (up to 20) has an odd or even number of objects. Write an equation to express an even number as a sum of two equal addends.

• 2.NR.3.2

  Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as...

01

What Students Need to Do

Students model groups that have the same number of objects. They use objects, drawings, skip counting, or repeated addition to find and explain the total.

02

What Mastery Looks Like

Students build or draw equal groups from a story and identify the number of groups and the amount in each. They find the total using repeated addition, skip counting, or counting all objects.

03

Common Misconceptions

Students may confuse the number of groups with the number in each group. They may call groups equal when the amounts differ or count only the groups instead of all objects.

04

How to Assess It

Give this exit ticket: “There are 4 baskets with 3 oranges in each basket. Draw the groups, write an addition equation, and find the total.”

1. 01

   Give students counters and paper plates, then have them model 5 plates with 4 counters on each and record the total.

2. 02

   Show 3 bags with 6 apples each and ask, “How could you find the total without counting every apple one by one?”

3. 03

   Students roll two number cubes, build that many groups and objects per group, then write the matching repeated addition equation.

4. 04

   Have students arrange 20 classroom pencils equally in 5 cups, then state the number of cups, pencils per cup, and total.

• 5.NR.2

  Multiply and divide multi-digit whole numbers to solve relevant, mathematical problems.

• 3.PAR.3

  Use part-whole strategies to solve real-life, mathematical problems involving multiplication and division with whole numbers within 100.

• 7.NR.1.9

  Apply properties of operations as strategies to solve multiplication and division problems involving rational numbers represented in an applicable scenario.

• 3.PAR.3.6

  Solve practical, relevant problems involving multiplication and division within 100 using part-whole strategies, visual representations, and/or concrete models.