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
- Choose a skip count that matches a repeated group size.
- 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
Seven pairs of socks lie on a table. How many individual socks?
Why this math matters
Count repeated packs quickly using the number inside each pack. 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.
Count by twos and fives
PausedQuestion: Start with the question. Paused.
Question
Start with the question
Seven pairs of socks lie on a table. How many individual socks?
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
Each pair = 2 socks
The grouping unit is a pair.
Connect the parts
2, 4, 6, 8, 10, 12, 14
Count once for each of the seven pairs.
State and check the result
7 pairs = 14 socks
Seven groups do not mean seven individual socks.
The result
7 pairs = 14 socks
Seven groups do not mean seven individual socks.
Common mistakes to catch
- Match the skip size to items in each group.
- Keep the number of groups separate from the final item count.
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
Four gloves each show five fingers. How many finger spaces?
Show a hint
Count four fives.
Reveal answer and explanation
20
5, 10, 15, 20 reaches twenty.
Practice 2
When counting by two from zero, will you land on 11?
Show a hint
List the numbers near eleven.
Reveal answer and explanation
No
The sequence reaches ten and twelve, skipping eleven.
Take the idea with you
Count repeated packs quickly using the number inside each pack.
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: Make pairs to test even and odd
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