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
- Name one of three equal parts as a third.
- 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 rectangular strip has 3 equal sections. One is shaded. What share is shaded?
Why this math matters
Mark a paper strip into three equal spaces to plan a fair three-person share. 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.
Recognize three equal shares
PausedQuestion: Start with the question. Paused.
Question
Start with the question
A rectangular strip has 3 equal sections. One is shaded. What share is shaded?
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
Whole strip = 3 equal sections
The same original strip defines all shares.
Connect the parts
Shaded sections = 1
Count selected sections after checking equality.
State and check the result
One third is shaded
Three such equal shares cover the whole.
The result
One third is shaded
Three such equal shares cover the whole.
Common mistakes to catch
- Three pieces are thirds only when their sizes match.
- The fraction refers to the original whole, not just the colored region.
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
Two of three equal sections are shaded. What share is shaded?
Show a hint
Count selected thirds.
Reveal answer and explanation
Two thirds
Two copies of one third cover two of the three sections.
Practice 2
A strip is cut into widths 1 cm, 2 cm, and 3 cm. Are these thirds?
Show a hint
Check whether the shares are equal.
Reveal answer and explanation
No
There are three pieces, but they have unequal areas when heights match.
Take the idea with you
Mark a paper strip into three equal spaces to plan a fair three-person share.
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: More equal pieces means smaller pieces
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