CBSE
CBSE Class 7 Mathemathics: Finding the Unknown
CBSE Class 7 Mathemathics Finding the Unknown audio notes in Hindi story format.
4-minute audio preview
CBSE focus
In the chapter "Finding the Unknown" from Class 7 Mathematics, Riya and Arjun discover an old weighing scale in their grandfather's storeroom. Their grandfather uses this scale to explain the fundamental concept of balancing equations, a key idea in solving for unknowns. The story shows how the scale's balance represents equality on both sides of an equation, helping students grasp how to find unknown values step by step. This chapter from Harshali Academy makes learning algebra intuitive and relatable. By listening to the full chapter on Harshali Academy, students can master these essential problem-solving skills with clear examples and explanations. CBSE learners can use this page to understand Finding the Unknown, prepare short answers, and revise the main ideas before class tests.
Hindi explanation
अध्याय 'अज्ञात का पता लगाना' में रिया और अर्जुन अपने दादाजी के साथ एक पुराने तराजू के माध्यम से गणित के महत्वपूर्ण विचार को समझते हैं। यह अध्याय कक्षा 7 के छात्रों को समीकरणों में संतुलन और अज्ञात मान खोजने की विधि सरल और रोचक तरीके से सिखाता है। हार्शाली अकादमी पर इस अध्याय को सुनकर विद्यार्थी गणित के इस महत्वपूर्ण विषय को आसानी से समझ सकते हैं।
Key concepts from this chapter
- Understanding balance as equality in equations
- Solving for unknown variables using simple equations
- Applying the rule: whatever is done on one side must be done on the other
- Simplifying equations by removing equal terms from both sides
- Checking for the possibility of given equations (validity of solutions)
Important exam questions with answers
If a sack and 5 kg weight balance with a 10 kg weight on the other side, what is the weight of the sack?
The sack's weight plus 5 equals 10, so sack = 10 - 5 = 5 kg. (2 points for correct equation setup, 2 points for correct answer)
Two sacks balance with 20 kg on the other side. Find the weight of one sack.
Total weight of two sacks is 20 kg, so one sack weighs 20 ÷ 2 = 10 kg. (2 points for understanding the division, 2 points for correct answer)
Explain why the equation x + 4 = x + 10 has no solution.
Removing x from both sides gives 4 = 10, which is false. Hence, no solution exists. (2 points for correct simplification, 2 points for explanation of no solution)
FAQ
What is the main idea behind 'finding the unknown' in this chapter?
The main idea is to understand equations as balanced scales where both sides are equal. Listening to the full chapter on Harshali Academy helps students grasp this concept clearly.
How does the chapter help in solving exam questions?
It teaches the step-by-step method to solve for unknowns by maintaining balance on both sides, a common exam topic. Harshali Academy's audio lessons provide detailed examples for practice.
Can this chapter help improve reasoning skills?
Yes, it emphasizes checking the validity of equations and logical thinking, which enhances reasoning. Harshali Academy's lessons guide students through such reasoning with easy explanations.
Why is it important to do the same operation on both sides of an equation?
Doing the same operation on both sides keeps the equation balanced, ensuring the equality remains true. This key rule is explained with examples in the chapter on Harshali Academy.
Are there real-life examples in this chapter?
Yes, the chapter relates balancing scales to everyday situations like sharing money equally, making abstract concepts easier to understand. Harshali Academy's audio lessons highlight these examples.
Download the app
Continue the full story-based lesson, Hindi audio, and chapter revision inside Harshali Academy.
Download on Play StoreListen to the full chapter
Use this page for quick understanding, then continue the complete audio lesson, revision flow, and Hindi-English learning support inside Harshali Academy.
Download Harshali Academy