Periods in National(Local)System and International System
| Local System | International System |
| Ones (3) | Ones(3) |
| Thousands(2) | Thousands(3) |
| Lakhs(2) | Millions(3) |
| Crores(2) | Billions(3) |
| Arabs(2) | Trillions(3) |
| Kharabs(2) | Quadrillions(3) |
Q. 1 Write the following in numerals using National and International System using commas:
a) 29765 b) 123456789 c) 908700005061 d) 7000000000005
Q. 2 Write the following in numerals according to the National system:
(i) Seventeen kharab and twenty-two.
(ii) Six arab ninety nine lakh nine hundred and nine.
(iii) Two lakh twelve thousand six hundred and thirty-one.
(iv) Sixty-two lakh, five thousand, eight hundred and three.
(v) Eight crore fifteen lakh seventeen thousand, eight hundred and fifteen.
(vi) Seventy arab four lakh ninety nine thousand and fifty.
Q. 3 Write the following in numerals according to the International System.
(i) Three hundred four million six thousand seven hundred forty three.
(ii) Ninety billion three million six hundred forty six.
(iii) Seven hundred thirty six billion four hundred seventy million three hundred thousand and six.
(iv) One trillion one hundred eleven billion ten thousand million one hundred thousand one hundred and one.
(v) Ninety billion and ninety.
Devanagari System (देवानागरी पद्दति) : https://snsmaths.blogspot.com/2020/09/devnagari-system.html
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