NY Next Generation Math NY-2.OA.4
The Standard
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 a sum of equal addends.
New York State Next Generation Mathematics Learning Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students find totals in rectangular arrays with no more than five rows and five columns. They write the total as repeated addition using equal addends.
What Mastery Looks Like
- The student counts 4 rows of 5 objects as 5 + 5 + 5 + 5 = 20. The equation matches the chosen row or column structure.
Common Misconceptions
- Students may skip or double-count objects when counting one by one. They may write unequal addends or use the number of rows as the total.
How to Assess It
- Show a 3-by-5 array. Ask students to find the total and write a repeated-addition equation that matches its rows.
Lesson moves
Ways to Teach It
Build arrays with tiles using up to five rows and five columns, then label each row.
Ask students how 3 rows of 4 and 4 columns of 3 describe the same array.
Play Array Match by pairing picture cards with repeated-addition equations.
Arrange muffins on a tray in equal rows and find the total without counting each muffin separately.
Free download
Printable NY-2.OA.4 Worksheet
A ready-to-print activity worksheet aligned to NY-2.OA.4, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
Download the worksheetKeep exploring
Related Standards
- NY-K.CC.5.a
Answer counting questions using as many as 20 objects arranged in a line, a rectangular array, and a circle. Answer counting questions using as many as 10 objec...
- NY-2.OA.3.b
Write an equation to express an even number as a sum of two equal addends.
- NY-1.OA.2
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20.
- NY-2.G.2
Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.
Also for this standard:Make a WorksheetMake a QuizMake a Sub Lesson