Chapter 4: Letter-Numbers wale Expressions
Akshar numbers ki jagah aa sakte hain. Is chapter mein hum "Meher ki umar = Kabir ki umar + 4" jaise niyam k + 4 likhenge, aise expressions ke maan nikaalenge, like terms milaakar saral karenge, aur unse pattern dikhaayenge, yahan tak ki saabit karenge ki pattern hamesha chalta hai.
Is chapter mein tum
- letter-numbers se rishte likhna
- diye maan par expression ka maan nikaalna
- like terms milaakar expressions saral karna
- expressions se pattern dikhaana aur samjhaana
Topics
- Letter-Numbers ka Vichaar NCERT 4.1
Letter-number ek number ke liye hota hai; k + 4 jaisa expression algebraic hai.
- Arithmetic Expressions Dobara NCERT 4.2–4.3
4n ka matlab 4 × n: pehle number likho aur × chhod do.
- Algebraic Expressions ka Sarlikaran NCERT 4.4
Like terms ke number jodkar jodo (5c + 3c = 8c); unlike terms alag rehte hain.
- Pattern Pakdo, Rishte Kholo NCERT 4.5
Pehle pattern shabdon mein, phir expression mein (C 3n par, B 3n − 1 par, …).
Key words
- Letter-number
- number ki jagah aane wala akshar
- Algebraic expression
- letter-numbers wala expression, jaise 2l + 2b
- Formula
- letter-numbers se likha aam niyam
- Like terms
- ek hi letter-number wale terms (5c, 3c)
- Unlike terms
- alag letter-numbers wale terms (18c, 11d)
- Simplify
- expression ko sabse chhote barabar roop mein likhna
Summary
- Letter-numbers niyamon ko expression banaate hain: k + 4, 2n, c × 35 + j × 60.
- 4n ka matlab 4 × n; maan ke liye akshar ki jagah bracket mein number rakho.
- Like terms milaao (5c + 3c = 8c); aam chinh niyam se bracket kholo.
- Expressions pattern dikhaate aur saabit karte hain: tiliyan 2y + 1, calendar vikarn 2a + 8.