Chapter 3: Point ke Aage Ek Jhalak
Jab poore unit theek naapne ke liye bade hon, to hum unhe tenths, hundredths aur thousandths mein baant-te hain. Is chapter mein hum dekhenge ye place value system ko decimal point tak kaise badhaata hai, ikaaiyan badlenge, decimals dhoondhenge aur tulna karenge, unhe jodenge-ghataayenge, aur aise chinh pehchaanenge jo sirf decimal jaise dikhte hain.
Is chapter mein tum
- tenths, hundredths aur thousandths ko decimal mein padhna-likhna
- decimal se mm, cm, m, g, kg aur paise badalna
- decimals ko number line par rakhna aur tulna karna
- decimals ka jod, ghataav aur andaaza
Topics
- Dasvaan Hissa NCERT 3.1–3.2
Unit ko 10 barabar hisson mein baanto: har ek one-tenth (1/10).
- Sauvaan Hissa aur Decimal Place Value NCERT 3.3–3.4
Har sthaan apne daayein wale ka 10 guna: … 10, 1, 1/10, 1/100, 1/1000.
- Naap ki Ikaaiyan NCERT 3.5
1 mm = 0.1 cm; 1 cm = 0.01 m; 1 g = 0.001 kg; 1 paisa = ₹0.01.
- Decimals ko Dhoondhna aur Tulna NCERT 3.6
Decimal ke ant ke zero maan nahi badalte (0.2 = 0.20); point ke theek baad ke zero badalte hain (0.02).
- Decimals ka Jod aur Ghataav NCERT 3.7
Decimal point line mein rakho (zero bharo), phir whole numbers ki tarah jodo ya ghatao.
- Decimal System ke Baare mein Aur NCERT 3.8
Point aur ikaai par dhyaan: 0.5 mg, 0.05 mg ka 10 guna hai.
Key words
- Tenth
- unit ke 10 barabar hisson mein se ek: 1/10 = 0.1
- Hundredth
- 1/100 = 0.01
- Thousandth
- 1/1000 = 0.001
- Decimal point
- whole hisse ko bhinn hisse se alag karne wala bindu
- Decimal system
- 10 par aadhaarit place value, tenths, hundredths … tak
- Place value
- sthaan ke kaaran ank ka maan
Summary
- 10 tenths = 1 unit; 10 hundredths = 1 tenth; 100 hundredths = 1 unit.
- 7.05 = 7 units aur 5 hundredths; 0.2 = 0.20, par 0.02 alag hai.
- 1 mm = 0.1 cm, 1 cm = 0.01 m, 1 g = 0.001 kg, 1 paisa = ₹0.01.
- Jodne-ghataane ke liye point line mein rakho; baayein se ank-ank tulna karo.