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 4 chapters and video availability01 · Read and understand
What you will learn
- Locate decimal values from equal subdivisions.
- Explain your method and check what the result means in the stated situation.
Before you start
Multiplication and division facts, simple fractions, place value, and basic length and area measurement.
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 line from 0.6 to 0.7 is divided into ten equal intervals. What value is the third mark after 0.6?
Why this math matters
Read a measuring scale whose labels skip over smaller subdivisions. 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 decimals between labeled marks
PausedQuestion: Start with the question. Paused.
Question
Start with the question
A line from 0.6 to 0.7 is divided into ten equal intervals. What value is the third mark after 0.6?
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
0.7 − 0.6 = 0.1
The entire short interval is one tenth long.
Connect the parts
0.1 ÷ 10 = 0.01
Each subdivision is one hundredth.
State and check the result
0.6 + 3(0.01) = 0.63
The third interval ends at sixty-three hundredths.
The result
0.6 + 3(0.01) = 0.63
The third interval ends at sixty-three hundredths.
Common mistakes to catch
- Determine interval size from the labeled span and interval count.
- A line's visual length does not define its numerical scale.
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
What is the seventh mark after 0.2 with hundredth-sized intervals?
Show a hint
Add seven hundredths.
Reveal answer and explanation
0.27
0.20 + 0.07 = 0.27.
Practice 2
If five equal intervals span 0 to 1, is each interval 0.1?
Show a hint
Divide the whole span by five.
Reveal answer and explanation
No; each is 0.2
Five tenths span only half the unit, while five fifths span the whole.
Take the idea with you
Read a measuring scale whose labels skip over smaller subdivisions.
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: Measure turns in degrees
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