2nd Grade Arrays and Equal Groups Worksheet Solutions (PDF)
This arrays practice solutions for 2nd Grade covers arrays and equal groups (Common Core 2.OA.C.4), with a free PDF to print.
Each answer shows the addition sentence with equal addends and the total. Count rows and columns carefully, and check that adding the rows and adding the columns give the same number.
Grade 2 · Common Core State Standards: 2.OA.C.4
Arrays practice solutions: exercises 1 to 10
Exercise 1 – Muffin tin
Rows go across: there are 3 rows.
Columns go up and down: there are 5 columns.
3 rows and 5 columns.
Exercise 2 – Window panes
There are 4 rows with 3 windows in each row.
\(3 + 3 + 3 + 3 = 12\)
There are 12 windows.
Exercise 3 – Chocolate squares
There are 4 columns with 2 squares in each column.
\(2 + 2 + 2 + 2 = 8\)
There are 8 squares.
Exercise 4 – Egg carton
\(5 + 5 = 10\)
There are 10 eggs.
Exercise 5 – Seed packets
\(2 + 2 + 2 + 2 + 2 = 10\)
There are 10 seed packets.
Exercise 6 – Two ways to add
Rows: \(5 + 5 + 5 = 15\)
Columns: \(3 + 3 + 3 + 3 + 3 = 15\)
Both sentences give 15 stamps.
Exercise 7 – Floor tiles
\(4 + 4 + 4 + 4 = 16\)
There are 16 tiles.
Exercise 8 – Draw a star array
Draw 3 lines of stars with 4 stars in every line.
\(4 + 4 + 4 = 12\)
There are 12 stars.
Exercise 9 – Cupcake tray
Add 4 for each of the 3 rows: \(4 + 4 + 4 = 12\)
12 cupcakes fit on the tray.
Exercise 10 – Desks in a classroom
\(3 + 3 + 3 + 3 + 3 = 15\)
There are 15 desks.
Exercises 11 and up
Exercise 11 – Missing total
Five fours: \(4 + 4 + 4 + 4 + 4 = 20\)
The array has 5 rows and 4 columns.
The missing total is 20.
Exercise 12 – Missing row size
Try 3: \(3 + 3 + 3 + 3 = 12\).
The sum is 12, so each row has 3.
Each row has 3 objects.
Exercise 13 – Same total?
3 rows of 5: \(5 + 5 + 5 = 15\)
5 rows of 3: \(3 + 3 + 3 + 3 + 3 = 15\)
True. Both arrays have 15 objects.
Exercise 14 – Find the mistake
There are only 2 rows, so 4 should be written 2 times, not 3 times.
\(4 + 4 = 8\)
The correct total is 8.
Exercise 15 – Bags of apples
4 equal groups of 5: \(5 + 5 + 5 + 5 = 20\)
There are 20 apples.
Exercise 16 – Sticker sheet
Whole sheet: \(5 + 5 + 5 + 5 + 5 = 25\)
Peeled off: \(5 + 5 = 10\)
Left: \(25 – 10 = 15\).
Check by counting the 3 rows left: \(5 + 5 + 5 = 15\).
15 stickers are left.
Exercise 17 – Garden rows
The garden now has 5 rows of 4.
\(4 + 4 + 4 + 4 + 4 = 20\)
There are 20 plants.
Exercise 18 – Two trays
Ethan: \(5 + 5 + 5 = 15\)
Aisha: \(5 + 5 = 10\)
Together: \(15 + 10 = 25\).
They have 25 cookies.
Exercise 19 – Which array is bigger?
A: \(3 + 3 + 3 + 3 = 12\)
B: \(5 + 5 + 5 = 15\)
\(15 – 12 = 3\).
Array B has 3 more dots.
Exercise 20 – Equal rows of stickers
4 rows: \(5 + 5 + 5 + 5 = 20\), so 5 in each row.
5 rows: \(4 + 4 + 4 + 4 + 4 = 20\), so 4 in each row.
5 stickers in each of 4 rows; 4 stickers in each of 5 rows.
Key facts behind this arrays practice solutions
- Rows go across and columns go up and down.
- Repeated addition adds the same number again and again: 4 + 4 + 4 = 12.
- Grade 2 arrays have up to 5 rows and up to 5 columns.
- Adding the rows or adding the columns gives the same total.
- Equal groups, such as 4 bags of 5, can be added the same way.
How to use this arrays practice solutions
Cover each solution, solve the exercise again, then uncover it and compare every line. If your answer differs, find the first step that changed and redo the exercise from there.
Download the arrays practice solutions as a PDF with the button below and keep it with your notes.
All Grade 2 chapters: Grade 2 math.
Print this page
Download PDFDownload the 2nd Grade Arrays and Equal Groups Worksheet Solutions (PDF, 68 KB)More 2nd Grade math
Lessons
See all
Worksheets
See all
Tests
See all
Picture Graphs, Bar Graphs and Line Plots Test with Point Values- One- and Two-Step Word Problems Test with Point Values
- Money: Dollars and Coins Test with Point Values
- Subtracting Within 100 Test with Point Values
- Skip Counting and Comparing Numbers Test with Point Values
- Arrays and Equal Groups Test with Point Values
