Crore pe Crore!

Class 7 Maths · Chapter 1: Hamare Aas-paas Bade Numbers · NCERT Ganita Prakash section 1.3

Seekho

+10,00,000 (das lakh) das baar dabao to 100 lakh milta hai, yaani ek crore: 1,00,00,000, 1 ke baad 7 zero. Sau crore = ek arab: 1,00,00,00,000 (9 zero). Har kadam pichhle ka 100 guna: 100 hazaar = 1 lakh, 100 lakh = 1 crore, 100 crore = 1 arab.

1 crore = 1,00,00,000 (7 zeros)

Do system. Indian system daayein se ank 3-2-2-2… mein baant-ta hai: thousand, lakh, crore, arab. American (International) system 3-3-3… mein: thousand, million, billion. Wahi number 9876501234 Indian mein 9,87,65,01,234 aur American mein 9,876,501,234.

9,87,65,01,234 = 9,876,501,234

Badalna: 10 lakh = 1 million (1,000,000), 1 crore = 10 million, 10 crore = 100 million, 100 crore (1 arab) = 1 billion. Lakh aur crore shabd Sanskrit ke lakṣha aur koṭi se aaye hain, aur Indian system kai padosi deshon mein bhi chalta hai.

10 lakh = 1 million · 100 crore = 1 billion

Bada number padhna: pehle comma lagao. 4050678 → 40,50,678 = forty lakh fifty thousand six hundred seventy eight; American mein 4,050,678 = four million fifty thousand six hundred seventy eight. Do system ke numbers ki tulna ke liye dono ko ek system mein badlo: 500 lakh = 5 crore = 50 million, to 500 lakh > 5 million.

Explore: Indian ya American commas?

Har number ko uske comma pattern se sort karo.

Yaad rakho

1 lakh = 5 zero, 1 crore = 7 zero, 1 arab = 9 zero; 1 million = 6 zero, 1 billion = 9 zero.
Indian commas 3-2-2-…, American 3-3-3-…; 10 lakh = 1 million, 100 crore = 1 billion.

Quick check

1 crore mein kitne million hote hain?

10
1
100
1,000

Answer

10. 1 crore = 1,00,00,000 = 10,000,000 = 10 million.

Socho

Ek billion mein kitne lakh hote hain?

Ek answer

10,000 lakh. Ek billion = 100 crore, aur har crore = 100 lakh, to 100 × 100 = 10,000 lakh.

Practice

Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.