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Cogito

Grade 2 Math · Chapter 6 · Lesson 4

Practice Worksheet

Rows and Columns

An array is equal groups lined up neatly.

10 problems · about 12 minutes · 2.OA.C.4

NameDate

Figure — use these to answer the problems

Swap the rows and columns round. Watch the total stay the same.

4 + 4 + 4 = 12

Rows3
Columns4
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Equal Groups”

    5 groups of 4. How many in all?

    Answer

  2. From “Two Equal Addends”

    14 = ? + ? What is each part?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. 3 rows of 5. How many in all?

    Answer

  2. Does 3 rows of 4 give the same total as 4 rows of 3?

    • Yes. Both are 12.
    • No. They are different.

  3. 3 rows of 3. How many in all?

    Answer

  4. 5 rows of 2. How many in all?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. 2 rows of 4. How many in all?

    Answer

  2. 4 rows of 4. How many in all?

    Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

2 problems

  1. The Egg Box

    An egg box has 2 rows of 5. How many eggs does it hold?

    Answereggs

  2. The Seating Plan

    A room has 4 rows of 5 chairs. How many chairs?

    Answerchairs