https://www.khanacademy.org/math/cc-kindergarten-math/cc-kindergarten-counting/kindergarten-numbers-100/v/counting-by-tens-example-problems 2022-10-07T04:52:10.377781811Z Counting by tens Practice counting by tens using numbers and ten frames. video https://cdn.kastatic.org/ka_thumbnails_cache/842e8bb7-d952-4fce-ae6b-cbbfb8e44959_1280_720_base.png Counting by tens Practice counting by tens using numbers and ten frames. https://cdn.kastatic.org/ka-youtube-converted/UnPpFw3natI.mp4/UnPpFw3natI.mp4 95 Introducing a Hundred and Three-Digit Numbers 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/mh-math-class-3-new/xa7b65308c92e651a:play-with-numbers/xa7b65308c92e651a:introducing-a-hundred-and-three-digit-numbers/v/reading-and-writing-3-digit-numbers 2026-06-25T05:40:38.851816207Z Reading and writing 3 digit numbers Reading numbers is easy… or is it? Learn how place value helps us read and write 3-digit numbers correctly, avoid common mistakes, and confidently switch between numbers and words. Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Reading and writing 3 digit numbers Reading numbers is easy… or is it? Learn how place value helps us read and write 3-digit numbers correctly, avoid common mistakes, and confidently switch between numbers and words. https://cdn.kastatic.org/ka-youtube-converted/aRJT4o9ijro.mp4/aRJT4o9ijro.mp4 255 Introducing a Hundred and Three-Digit Numbers