Chapter 12: Point ke Aage Ek Aur Jhalak
Decimals 10, 100, 1000 … par fractions hain, isliye unka guna-bhaag ho sakta hai. Is chapter mein guna-phal mein decimal point lagaane ka jaldi niyam, point ke aage lambi bhaag, decimals se bhaag, kabhi khatam na hone wale bhaag, aur ek chhote decimal ne leap-year calendar kaise banaaya, ye sab dekhenge.
Is chapter mein tum
- 10 ki ghaaton par fractions ko decimal banaana
- decimals ka guna aur point lagaana
- decimals ko poore numbers aur decimals se bhaag dena
- decimals se leap year samjhaana
Topics
- Decimals ka Jaldi Dohraav NCERT P2 4.1
10, 100, 1000 … wala fraction point ko baayein le jaakar decimal banta hai.
- Decimals ka Multiplication NCERT P2 4.2
Bina point guna karo; guna-phal ke decimal sthaan = dono ke sthaanon ka jod.
- Decimals ka Division NCERT P2 4.3
Lambi bhaag chalti rehti hai: ikaai ko dashaansh, dashaansh ko shataansh, aur bhaagphal mein point.
- Chhalaang se Pehle Dekho! NCERT P2 4.4
Saal 365.2422 din ka, isliye calendar ko leap years chahiye.
Key words
- Decimal place
- point ke baad sthaan: dashaansh, shataansh …
- Regroup
- bhaag jaari rakhne ko 1 ikaai = 10 dashaansh
- Recurring decimal
- jiske ank hamesha dohraayein, jaise 3.333…
- Leap year
- 366 din ka saal
Summary
- Decimals bina point guna karo, phir guna-phal ko dono ke milaakar utne sthaan.
- 10ⁿ se bhaag ke liye point baayein; decimal bhaajak ke liye pehle dono ko 10ⁿ se guna.
- Lambi bhaag dashaansh, shataansh … mein badalti; kuch bhaag hamesha dohraate.
- Saal 365.2422 din ka, isliye leap year 4–100–400 niyam se.