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10 printable sets · answer key on every set

Arrays and Repeated Addition Worksheets

  • CCSS 2.OA.C.4
  • 12 problems per set
  • Answer key included

What this skill is

Seeing objects in equal rows and writing the total as repeated addition.

When it comes up: Second grade, the step before multiplication.

The mistake to watch for

Counting every dot one at a time and losing track, instead of finding one row and adding it again for each row.

How to help

Cover all the rows except one: this row has 5. Uncover the next row and say 5 + 5 = 10. Each row adds the same amount again.

Next: Multiplication facts in third grade, where 5 + 5 + 5 becomes 3 × 5.

A worked example

An array has 3 rows with 5 dots in each row. Write 5 + 5 + 5 = 15. The array has 15 dots, and you can also say 3 × 5 = 15.

Words to know

array
Objects arranged in equal rows and columns, like the dots on a dice or the windows on a building.
row
A line of things going across, from side to side.
column
A line of things going down, from top to bottom.
multiply
To add the same number again and again, in a faster way.
total
All of the things added together.

Practice

Write the repeated addition and the total.

Showing Set 1 · 12 problems

  1. An array has 3 rows with 2 dots in each row. Write the repeated addition and the total.
  2. An array has 5 rows with 5 dots in each row. Write the repeated addition and the total.
  3. An array has 4 rows with 5 dots in each row. Write the repeated addition and the total.
  4. An array has 2 rows with 2 dots in each row. Write the repeated addition and the total.
  5. An array has 5 rows with 4 dots in each row. Write the repeated addition and the total.
  6. An array has 2 rows with 3 dots in each row. Write the repeated addition and the total.
  7. An array has 3 rows with 3 dots in each row. Write the repeated addition and the total.
  8. An array has 2 rows with 5 dots in each row. Write the repeated addition and the total.
  9. An array has 3 rows with 4 dots in each row. Write the repeated addition and the total.
  10. An array has 5 rows with 3 dots in each row. Write the repeated addition and the total.
  11. An array has 4 rows with 4 dots in each row. Write the repeated addition and the total.
  12. An array has 3 rows with 5 dots in each row. Write the repeated addition and the total.

Download this set12 problems · answer key included PDF

Answer key
  1. 2 + 2 + 2 = 6
  2. 5 + 5 + 5 + 5 + 5 = 25
  3. 5 + 5 + 5 + 5 = 20
  4. 2 + 2 = 4
  5. 4 + 4 + 4 + 4 + 4 = 20
  6. 3 + 3 = 6
  7. 3 + 3 + 3 = 9
  8. 5 + 5 = 10
  9. 4 + 4 + 4 = 12
  10. 3 + 3 + 3 + 3 + 3 = 15
  11. 4 + 4 + 4 + 4 = 16
  12. 5 + 5 + 5 = 15

All 10 sets

Each set is a different list of 12 problems with its own answer key. Use the buttons above to look at one on this page, or download any of them as a PDF.

How these sheets were made
  • Problems are generated for each set and checked against 2.OA.C.4 before the sheet is built — no duplicates, and every problem falls inside the standard's number range.

Common Core State Standards © 2010 National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.