https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-1000/cc-2nd-sub-ones-tens-hundreds/v/subtracting-hundreds-and-tens 2021-05-18T23:20:45Z Subtracting 1, 10, or 100 Sal subtracts 1, 10, or 100 from a number. video https://cdn.kastatic.org/googleusercontent/k--HGxHIan_egBr9X69lhp7obnePDV5J-0N9Vo-sw-MKaRVgY6WkpW4Pz_CG0iN6h2JFKwidO8quHMiw_qV3W76qVw Subtracting 1, 10, or 100 Sal subtracts 1, 10, or 100 from a number. https://cdn.kastatic.org/ka-youtube-converted/4BNIGTHUTTM.mp4/4BNIGTHUTTM.mp4 251 Strategies for subtracting within 1,000 https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-1000/cc-2nd-sub-ones-tens-hundreds/v/subtracting-3-digits 2021-07-06T11:21:36Z Subtracting 1s, 10s, and 100s Sal subtracts 3-digit numbers by subtracting ones, tens, and hundreds. video https://cdn.kastatic.org/googleusercontent/3yEKnhbtknObjYu2FYS7LhaCvzBE0GL1D6PW5T-U-voEODZIGc7Z60LzLgGrVIETKm823SrIoGeKAuUp6M95OjivUA Subtracting 1s, 10s, and 100s Sal subtracts 3-digit numbers by subtracting ones, tens, and hundreds. https://cdn.kastatic.org/ka-youtube-converted/ycBxbgjQns4.mp4/ycBxbgjQns4.mp4 192 Strategies for subtracting within 1,000 https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-1000/cc-2nd-sub-ones-tens-hundreds/v/subtracting-three-digit-numbers-without-regrouping 2021-05-18T23:20:47Z Subtracting 3-digit numbers (no regrouping) Sal shows how to subtract 357-251 with place value. video https://cdn.kastatic.org/googleusercontent/YaSG5DuGCZ-iL_0mWlTFolnZat8v93Hpz00bwrSIWjozTDKg2o6D2SMgPiuVS8pjIIa72j-Qvpfx52VZU-2gtQbQ Subtracting 3-digit numbers (no regrouping) Sal shows how to subtract 357-251 with place value. https://cdn.kastatic.org/ka-youtube-converted/i8r7ZTUqB9w.mp4/i8r7ZTUqB9w.mp4 177 Strategies for subtracting within 1,000 https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-1000/cc-2nd-sub-ones-tens-hundreds/e/subtract-within-1000--level-1 2026-04-07T23:36:17.218592739Z Subtract 10s and 100s (no regrouping) Practice subtracting 1, 10, or 100 from a number. Teri Lovelace exercise https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-1000/cc-2nd-sub-ones-tens-hundreds/e/subtract-within-1000--level-2 2026-04-07T22:59:30.107127435Z Subtract within 1,000 using place value blocks Practice solving subtraction problems using place value blocks. All numbers used are within 1000. Teri Lovelace exercise https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/imp-strategies-for-adding-two-and-three-digit-numbers/v/exercise-for-numberline-addition-and-subtraction 2021-07-12T13:50:37Z Adding and subtracting on number line Sal adds and subtracts numbers like 585 and 368 using a number line. Numbers used in these problems are less than 1000. video https://cdn.kastatic.org/googleusercontent/3vHZHL-qMkSrAizyphwgMg07yStyrR0nff6ahrt_T-W_8Y9ys6apjFEGMZEvU8BCUsInkVCkdIKDPfafN4tPzsJB Adding and subtracting on number line Sal adds and subtracts numbers like 585 and 368 using a number line. Numbers used in these problems are less than 1000. https://cdn.kastatic.org/ka-youtube-converted/WevZMyikGV4.mp4/WevZMyikGV4.mp4 145 Strategies for subtracting within 1,000 https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/strategies-for-subtracting-two-and-three-digit-numbers/e/subtract-on-a-number-line 2026-04-07T22:59:30.107127435Z Subtract on a number line Practice subtracting numbers like 784 and 391 using a number line. All numbers are less than 1000. Lindsay exercise