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 Make tens from ones 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 Make tens from ones https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-place-value/cc-1st-ones-tens/v/rep-quantity-with-digits 2021-06-24T11:10:09Z Place value example: 42 Sal shows 42 as 4 tens and 2 ones. video https://cdn.kastatic.org/googleusercontent/bUTrWUBVWvVS2gPwJf5ai-JJhHulvXsEQ6_EMNN-l16uOpCq1sPh06kP6JpALZWGK4DCxmK4eYUodLPi9JAMajwReg Place value example: 42 Sal shows 42 as 4 tens and 2 ones. https://cdn.kastatic.org/ka-youtube-converted/-Zlq5tNl94M.mp4/-Zlq5tNl94M.mp4 259 Make tens from ones https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-place-value/cc-1st-ones-tens/e/groups-of-tens 2026-04-07T23:55:07.30621384Z Groups of ten objects Practice grouping objects by tens. Sarah Ledon exercise https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-place-value/cc-1st-ones-tens/e/tens-and-ones 2026-03-24T23:41:07.080866137Z Tens and ones Practice thinking about 2-digit numbers as tens and ones. Erin Kats exercise 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