Subscribe

2nd grade · Math · Unit 10 of 19

Arrays

Rows and columns

What your child practices

Adding equal rows to find the total in an array (up to 5 by 5), and cutting a rectangle into rows and columns of squares. This gets ready for multiplication.

Texas Essential Knowledge and Skills (TEKS) teks student expectation: 2.6(A); 2.9(F) · adding equal rows in an array and covering a rectangle with square units

How we explain it

Children can open this short lesson before they practice.

  1. An array has equal rows.
  2. Add the same number once for each row.
  3. This is a first step to multiplying.

Example: 3 rows with 4 in each row. How many in all? 4 + 4 + 4 = 12. Answer: 12

Arrays in Texas

In the Texas Essential Knowledge and Skills (TEKS), this is unit 10 of 19 in 2nd grade Math, after Groups & Sharing and before Dollars & Cents.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Texas Education Agency (TEA)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    There are 2 rows with 5 chairs in each. How many chairs in all?

    • 10
    • 7
    • 15
    • 9

  2. Question 2

    A rectangle is cut into 4 rows and 5 columns of same-size squares. How many squares?

    • 18
    • 21
    • 20
    • 9

  3. Question 3

    How many 🌟 are in the array?

    • 12
    • 7
    • 11
    • 9
    • 6

  4. Question 4

    There are 5 rows with 4 in each row. Which addition finds the total?

    • 4 + 4 + 4 + 4 + 4 + 4
    • 5 + 4
    • 4 + 4 + 4 + 4 + 4
    • 5 + 5 + 5 + 5 + 5

  5. Question 5

    There are 2 rows with 3 in each row. Which addition finds the total?

    • 2 + 3
    • 3 + 3 + 3
    • 3 + 3
    • 4 + 4

  6. Question 6

    There are 5 rows in a garden with 2 plants in each. How many plants in all?

    • 7
    • 10
    • 12
    • 11

More 2nd grade