https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-place-value/cc-1st-ones-tens/v/place-value-introduction 2021-06-24T11:10:09Z Intro to place value Sal uses the number 37 to explain why we use a "ones place" and a "tens place" when writing numbers.  Sal Khan video https://cdn.kastatic.org/googleusercontent/WOSBVwDSC8lY3Wlrxms89siOeh9MRzgZmm0tmHyGsFvn0XU-Vl_PYBFdxkWQnbwwi4OYD1LhxNHzkoso3oy9xowr Intro to place value Sal uses the number 37 to explain why we use a "ones place" and a "tens place" when writing numbers.  https://cdn.kastatic.org/ka-youtube-converted/wx2gI8iwMCA.mp4/wx2gI8iwMCA.mp4 359 Face Value, Place Value, and Expanded Form https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-place-value/cc-1st-ones-tens/v/place-value-example 2021-06-24T11:10:10Z Place value example: 25 Sal shows 25 as 2 tens and 5 ones. Sal Khan video https://cdn.kastatic.org/googleusercontent/XaaqJ31plAm50izuFxARNYFqp0OKqoaPtFch7u_3FCxm2u6ALWsh25brsW4E2yCc14dsXXYXOrFPbi1TRJPm1tU Place value example: 25 Sal shows 25 as 2 tens and 5 ones. https://cdn.kastatic.org/ka-youtube-converted/X_PnRFAKbkg.mp4/X_PnRFAKbkg.mp4 175 Face Value, Place Value, and Expanded Form https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-place-value/cc-1st-ones-tens/e/understanding-2-digit-numbers 2026-04-08T01:15:04.085520103Z 2-digit place value challenge Practice breaking numbers apart into tens and ones. Sarah Ledon exercise https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-place-value/x3184e0ec:numbers-in-standard-word-and-expanded-form/v/expanded-form-of-numbers 2021-05-18T23:20:44Z Expanded form of numbers Sal shows how to turn numbers from expanded form to number form. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Expanded form of numbers Sal shows how to turn numbers from expanded form to number form. https://cdn.kastatic.org/ka-youtube-converted/drZjIlmHdME.mp4/drZjIlmHdME.mp4 177 Face Value, Place Value, and Expanded Form https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-place-value/x3184e0ec:numbers-in-standard-word-and-expanded-form/e/write-numbers-between-standard-and-expanded-form 2026-04-08T00:36:09.500768563Z Write numbers in number and expanded form Write numbers in number and expanded form within 1000.  Kami Soltesz exercise https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-place-value/x3184e0ec:numbers-in-standard-word-and-expanded-form/v/word-form-and-expanded-form 2021-03-30T19:55:55Z Word form and expanded form Sal shows how to write numbers from word form to expanded form. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Word form and expanded form Sal shows how to write numbers from word form to expanded form. https://cdn.kastatic.org/ka-youtube-converted/83Tji22tYGY.mp4/83Tji22tYGY.mp4 86 Face Value, Place Value, and Expanded Form https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-place-value/cc-2nd-hundreds/v/regrouping-whole-numbers 2021-07-02T22:45:38Z Regrouping whole numbers: 675 Sal regroups 675 into various addition problems. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZDycpi0lu03SETGWMKAfASfs3xHRSHT2VwJPImNLI9t1WX0vzxzlnjsVW-F73WO4D7mUj1FuN4HitmPJAaZd726D6A Regrouping whole numbers: 675 Sal regroups 675 into various addition problems. https://cdn.kastatic.org/ka-youtube-converted/X3JqIZR1XcY.mp4/X3JqIZR1XcY.mp4 263 Face Value, Place Value, and Expanded Form https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-place-value/x3184e0ec:numbers-in-standard-word-and-expanded-form/e/write-numbers-between-standard-and-written-form 2026-04-08T01:15:04.085520103Z Write numbers in number and word form Write numbers in number and word form within 1000. Kami Soltesz exercise