Florida B.E.S.T. MA.2.AR.3.2
The Standard
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.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students arrange or interpret objects in equal rows and columns. They add the same group size repeatedly and write an equation that matches the array.
What Mastery Looks Like
- Given an array, students can name the number of equal groups and the number in each group. They can write an equation such as 3 + 3 + 3 + 3 = 12 and explain how it matches the array.
Common Misconceptions
- Students may add the number of rows and columns instead of counting every object. They may make unequal groups or write too few addends, such as 3 + 3 + 3 for three rows of four.
How to Assess It
- Exit ticket: Draw an array with four rows of three dots. Write a repeated-addition equation and find the total.
Lesson moves
Ways to Teach It
Give pairs 18 counters and ask them to build three equal rows, count the total, and record a matching equation.
Show a three-by-five array and ask, "How can two repeated-addition equations describe this array?"
Students roll two dice, draw the matching array on grid paper, and earn a point for a correct equation and total.
Have students sketch an egg carton, label its rows, and write a repeated-addition equation for the number of spaces.
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Printable MA.2.AR.3.2 Worksheet
A ready-to-print activity worksheet aligned to MA.2.AR.3.2, with an answer key for the teacher on its own page. No account needed.
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