https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:large-numbers-around-us/x063f95a40c290960:a-lakh-varieties/v/reading-and-writing-large-numbers 2021-06-02T12:43:23Z Reading and writing large numbers A number like 143567821 is hard to read at first glance (perhaps even at second glance). How should we read numbers like these? How can we make it easier to read and write such large numbers? Aanand Srinivas video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Reading and writing large numbers A number like 143567821 is hard to read at first glance (perhaps even at second glance). How should we read numbers like these? How can we make it easier to read and write such large numbers? https://cdn.kastatic.org/ka-youtube-converted/RD_qY2EIlbI.mp4/RD_qY2EIlbI.mp4 312 Large Numbers Around US https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:large-numbers-around-us/x063f95a40c290960:a-lakh-varieties/v/intro-to-lakhs-and-crores 2021-06-02T12:43:21Z Intro to lakhs and crores You probably know that lakhs and crores are big numbers. How big are they really? How many 1000 INR notes to do you need to have 1 Lakh? How many do you need to have 1 Crore? Aanand Srinivas video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Intro to lakhs and crores You probably know that lakhs and crores are big numbers. How big are they really? How many 1000 INR notes to do you need to have 1 Lakh? How many do you need to have 1 Crore? https://cdn.kastatic.org/ka-youtube-converted/UBkpwbH7-i0.mp4/UBkpwbH7-i0.mp4 586 Large Numbers Around US https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-place-value/x3184e0ec:intro-to-place-value/v/place-value-tables-within-1000-2 2022-10-07T02:31:07.468665539Z Place value tables within 1,000 Sal places numbers 842 and 507 into a place value table. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/8eb0be61-2ef3-4809-b53a-775969071466_1280_720_base.png Place value tables within 1,000 Sal places numbers 842 and 507 into a place value table. https://cdn.kastatic.org/ka-youtube-converted/Wt3IrBqq6Uc.mp4/Wt3IrBqq6Uc.mp4 151 Large Numbers Around US https://www.khanacademy.org/math/cc-fourth-grade-math/imp-place-value-and-rounding-2/imp-intro-to-place-value/v/place-value-tables 2022-10-06T09:48:27.705455518Z Place value tables Learn about how to use a place value table to break up a number. video https://cdn.kastatic.org/googleusercontent/JcfZ4I-frEYF_txFIqtAHBwUfCeJcWlQ2rKlfZC-l8WUIWK8EGVrAVc7W8GyD7j7UJezsZLionO6R76LjN1gnEiMjg Place value tables Learn about how to use a place value table to break up a number. https://cdn.kastatic.org/ka-youtube-converted/2njG0S_GuVA.mp4/2njG0S_GuVA.mp4 144 Large Numbers Around US https://www.khanacademy.org/math/od-math-class-7-revision-term-1-2026/x10076f1e7de9754e:week-1/x10076f1e7de9754e:large-numbers-around-us/e/large-numbers-around-us-revision-exercise 2026-08-04T13:11:10.859802832Z Large Numbers Around Us - Revision Exercise 1 Large Numbers Around Us - Revision Exercise 1 Khan Academy exercise https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:large-numbers-around-us/x063f95a40c290960:of-crores-and-crores/v/intro-to-millions-and-billions 2020-10-07T19:09:50Z Intro to millions and billions The Indian system uses lakhs and crores to talk about large numbers. In the international system, large numbers are referred to as millions and billions. How are millions and billions related to the Indian system? Aanand Srinivas video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Intro to millions and billions The Indian system uses lakhs and crores to talk about large numbers. In the international system, large numbers are referred to as millions and billions. How are millions and billions related to the Indian system? https://cdn.kastatic.org/ka-youtube-converted/qKa8CQCDv_Q.mp4/qKa8CQCDv_Q.mp4 536 Large Numbers Around US https://www.khanacademy.org/math/cc-fourth-grade-math/imp-addition-and-subtraction-2/imp-rounding-whole-numbers/v/rounding-whole-numbers-1 2021-05-07T00:21:29Z Rounding whole numbers to nearest hundred Sal rounds 24,259 to the nearest hundred. Sal Khan video https://cdn.kastatic.org/googleusercontent/b_E-BV8lAgK4rKUds-k54TxBJ5QL8ney-nKJ7D9PqCkHBRSvGyXzPPgWqVUe3C-T2O4fXa_EQQToxXDgzRYaCT7rgw Rounding whole numbers to nearest hundred Sal rounds 24,259 to the nearest hundred. https://cdn.kastatic.org/ka-youtube-converted/_qzs1zozTBo.mp4/_qzs1zozTBo.mp4 263 Large Numbers Around US https://www.khanacademy.org/math/cc-fourth-grade-math/imp-addition-and-subtraction-2/imp-rounding-whole-numbers/v/rounding-whole-numbers-2 2021-06-02T12:43:21Z Rounding whole numbers to nearest thousand Sal rounds 423,275 to the  nearest thousand. Sal Khan video https://cdn.kastatic.org/googleusercontent/rk54G1NOiQEA61DjEjl8-owWWBS2HLglE5pgTPj53WMmkvbn_dmC-TomncSoJgBQDsV85X-o_e5MErxgEDWtWZic Rounding whole numbers to nearest thousand Sal rounds 423,275 to the  nearest thousand. https://cdn.kastatic.org/ka-youtube-converted/fh8gkPW_6g4.mp4/fh8gkPW_6g4.mp4 148 Large Numbers Around US https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:large-numbers-around-us/x063f95a40c290960:patterns-in-product/v/a-multiplication-shortcut 2026-04-23T05:30:33.127061057Z A Multiplication Shortcut Unlock multiplication shortcuts! Discover fascinating patterns related to products that make complex calculations simple. This video will enhance your understanding of multiplication, helping you solve problems faster and more efficiently. Perfect for students and anyone looking to boost their math skills. Learn the secrets to quick multiplication! Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw A Multiplication Shortcut Unlock multiplication shortcuts! Discover fascinating patterns related to products that make complex calculations simple. This video will enhance your understanding of multiplication, helping you solve problems faster and more efficiently. Perfect for students and anyone looking to boost their math skills. Learn the secrets to quick multiplication! https://cdn.kastatic.org/ka-youtube-converted/IAUIwh5Ra_U.mp4/IAUIwh5Ra_U.mp4 466 Large Numbers Around US https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:large-numbers-around-us/x063f95a40c290960:patterns-in-product/v/how-long-is-the-product 2026-04-23T05:30:33.127061057Z How Long is the Product? Learn to quickly determine the number of digits in a product with this essential math tutorial! Perfect for students and anyone looking to boost their number sense. This video breaks down complex concepts into easy-to-understand steps, making it simple to master ""How Long is the Product?"" and ace your next math challenge. Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw How Long is the Product? Learn to quickly determine the number of digits in a product with this essential math tutorial! Perfect for students and anyone looking to boost their number sense. This video breaks down complex concepts into easy-to-understand steps, making it simple to master ""How Long is the Product?"" and ace your next math challenge. https://cdn.kastatic.org/ka-youtube-converted/3oY6fE-50Iw.mp4/3oY6fE-50Iw.mp4 267 Large Numbers Around US https://www.khanacademy.org/math/od-math-class-7-revision-term-1-2026/x10076f1e7de9754e:week-1/x10076f1e7de9754e:large-numbers-around-us/e/large-numbers-around-us-revision-exercise-2 2026-08-04T13:11:10.859802832Z Large Numbers Around Us - Revision Exercise 2 Large Numbers Around Us - Revision Exercise 2 Khan Academy exercise