Learn with Amar
Teaching video
A teaching recording for this chapter has not been published yet. Start with the worked example below and explore the related animations where available.
Grade 2 chapters and video availability01 · Read and understand
What you will learn
- Represent equal rows as repeated addition.
- Explain your method and check what the result means in the stated situation.
Before you start
Counting and comparing whole numbers, basic addition and subtraction, and recognizing simple shapes.
Keep paper nearby. Read the question once for the context, then again to identify what is known and what you need to find.
Start with a question
A tray has 3 rows of 4 muffins. How many muffins?
Why this math matters
Count seats or tiles by equal rows instead of one at a time. The worked example shows how to connect the situation, its mathematical representation, and a check on the result.
Set up the model
A useful answer starts with clear assumptions:
- Use the units, grouping rules, and reference whole stated in the question.
- Treat the supplied counts and measurements as exact within the classroom model, unless an estimate or a random outcome is requested.
02 · Work through the example
Follow the reasoning, one step at a time.
Try to predict the next step before reading it. After each calculation, explain why the operation makes sense and how it helps answer the original question.
Work through it with Amar
See this example unfold.
The complete worked example, one idea at a time.
Read an array by rows and columns
PausedQuestion: Start with the question. Paused.
Question
Start with the question
A tray has 3 rows of 4 muffins. How many muffins?
Before you calculate
Read what is known and what you need to find. Make a prediction before moving to the first calculation.
Starts paused. Play advances through the full text at a reading pace; pause whenever you need more time. Previous, Next, and the phase buttons let you set your own pace. Playback pauses when this walkthrough leaves the screen or you switch tabs.
Your device’s reduced-motion setting keeps each phase still. Manual controls remain available. The full written solution stays below.
Represent the situation
Rows: 4, 4, 4
Each row has the same count.
Connect the parts
4 + 4 + 4 = 12
Add once for each of the three rows.
State and check the result
12 muffins in 3 rows of 4
Counting four columns of three gives the same total.
The result
12 muffins in 3 rows of 4
Counting four columns of three gives the same total.
Common mistakes to catch
- Rows and items in each row are different counts.
- An irregular arrangement is not automatically an equal-row array.
03 · Practice independently
Try it before revealing the answer.
Use paper or a calculator as needed. Write your units and reasoning, then open the hint or explanation to check your approach.
Practice 1
A rectangle of dots has 2 rows of 6. What total?
Show a hint
Add one six for each row.
Reveal answer and explanation
12
6 + 6 = 12.
Practice 2
What changes when a 3-by-4 array is turned a quarter-turn?
Show a hint
Rows become columns.
Reveal answer and explanation
It becomes 4 rows of 3; total stays 12
Turning rearranges the viewpoint without adding or removing dots.
Take the idea with you
Count seats or tiles by equal rows instead of one at a time.
04 · Reflect and continue
Can you explain it in your own words?
Before moving on, explain the main idea without looking at the worked example. Try both practice questions, check your reasoning, and name one mistake you now know how to avoid. Return to a step if you still need support.
Up next: Share a collection fairly
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