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 1 chapters and video availability01 · Read and understand
What you will learn
- Split an addend to make ten first.
- Explain your method and check what the result means in the stated situation.
Before you start
Recognizing small groups and saying counting words; an adult may read the prompts aloud.
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
Find 8 + 5 using a ten-frame.
Why this math matters
Group items into a full ten before counting the extras. 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.
Add by stopping at ten
PausedQuestion: Start with the question. Paused.
Question
Start with the question
Find 8 + 5 using a ten-frame.
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
8 needs 2 to reach 10
Fill the empty spaces first.
Connect the parts
5 = 2 + 3
Split five into the two used and three left.
State and check the result
8 + 5 = 10 + 3 = 13
The regrouping changes the parts, not the total.
The result
8 + 5 = 10 + 3 = 13
The regrouping changes the parts, not the total.
Common mistakes to catch
- Remember the part left after filling ten.
- Do not add the used part a second time.
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
Find 9 + 4 by making ten.
Show a hint
Use one from four first.
Reveal answer and explanation
13
9 + 1 = 10, with three still to add.
Practice 2
For 7 + 6, how should six be split to make ten?
Show a hint
Find how much seven needs.
Reveal answer and explanation
3 + 3
7 + 3 = 10 and another three gives thirteen.
Take the idea with you
Group items into a full ten before counting the extras.
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: Subtraction removes a part
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