# MA.2.AR.3.2

Use repeated addition to find the total number of objects in a collection of equal groups. Represent the total number of objects using rectangular arrays and equations.

### Clarifications

Clarification 1: Instruction includes making a connection between arrays and repeated addition, which builds a foundation for multiplication.

Clarification 2: The total number of objects is limited to 25.

General Information
Subject Area: Mathematics (B.E.S.T.)
Strand: Algebraic Reasoning
Status: State Board Approved

## Related Courses

This benchmark is part of these courses.
5012040: Mathematics - Grade Two (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current))
7712030: Access Mathematics Grade 2 (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 - 2022, 2022 and beyond (current))
5012005: Foundational Skills in Mathematics K-2 (Specifically in versions: 2019 - 2022, 2022 and beyond (current))

## Related Access Points

Alternate version of this benchmark for students with significant cognitive disabilities.
MA.2.AR.3.AP.2: Explore using repeated addition to find the total number of objects represented in a collection of equal groups (e.g., 3 groups of 2 objects) or in a rectangular array (e.g., 3 rows of 2 objects). Total objects may not exceed 20.

## Related Resources

Vetted resources educators can use to teach the concepts and skills in this benchmark.

## Formative Assessments

Counting By Rows or Columns:

Students are asked to make an array from pennies and then skip count to find the total number of pennies and write an addition equation to represent the array.

Type: Formative Assessment

All Your Penguins in a Row:

Students are asked count by rows or columns to determine the total number in an array and then write an addition equation to represent the array.

Type: Formative Assessment

Students are asked to write an equal addends equation that corresponds to a given array.

Type: Formative Assessment

Counting an Array:

Students are asked to find the total number of objects in a 3 x 4 array.

Type: Formative Assessment

## Lesson Plan

Odds and Evens:

This resource helps students identify numbers as odd or even using a variety of methods including creating pairs, skip counting by two’s, using number lines, and arrays. It also leads them to understand that all even numbers can be written as a sum of equal addends and odds can be written as the sum of equal addends plus one.

This resource can be conducted as one lesson or can be spread over multiple mini sessions if needed as noted within this resource as Lesson 1 and Lesson 2.

Type: Lesson Plan

## Original Student Tutorial

Destinee Dragon’s Donut Troubles: Arrays:

Help Destinee use arrays and repeated addition to find how many donuts that she has in this interactive tutorial.

Type: Original Student Tutorial

## MFAS Formative Assessments

All Your Penguins in a Row:

Students are asked count by rows or columns to determine the total number in an array and then write an addition equation to represent the array.

Counting an Array:

Students are asked to find the total number of objects in a 3 x 4 array.

Counting By Rows or Columns:

Students are asked to make an array from pennies and then skip count to find the total number of pennies and write an addition equation to represent the array.

Students are asked to write an equal addends equation that corresponds to a given array.

## Original Student Tutorials Mathematics - Grades K-5

Destinee Dragon’s Donut Troubles: Arrays:

Help Destinee use arrays and repeated addition to find how many donuts that she has in this interactive tutorial.

## Student Resources

Vetted resources students can use to learn the concepts and skills in this benchmark.

## Original Student Tutorial

Destinee Dragon’s Donut Troubles: Arrays:

Help Destinee use arrays and repeated addition to find how many donuts that she has in this interactive tutorial.

Type: Original Student Tutorial

## Parent Resources

Vetted resources caregivers can use to help students learn the concepts and skills in this benchmark.