https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-1000/cc-2nd-sub-ones-tens-hundreds/v/subtracting-with-place-value-blocks-regrouping 2022-11-24T00:44:27.489178686Z Subtracting with place value blocks (regrouping) Sal uses place value blocks to regroup and subtract 438-272. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/570f9f11-bfec-4079-8f39-3d5bbf21ac23_1280_720_base.png Subtracting with place value blocks (regrouping) Sal uses place value blocks to regroup and subtract 438-272. https://cdn.kastatic.org/ka-youtube-converted/F63kWrYg6fY.mp4/F63kWrYg6fY.mp4 149 Subtraction of numbers less than 10,000 (with and without regrouping) 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/strategies-for-subtracting-two-and-three-digit-numbers/v/subtraction-by-breaking-apart 2022-10-06T09:25:13.606060383Z Subtraction by breaking apart Solve 2- and 3-digit subtraction problems by breaking apart the numbers by place value. video https://cdn.kastatic.org/googleusercontent/7n6lBxkYakZEkMa93DBJCXCStFBl6wG5S093dGZHEwIWNaZkIx7Qt87iRcP4vWObroXTNA0d6laN_xzUfa_W8ss Subtraction by breaking apart Solve 2- and 3-digit subtraction problems by breaking apart the numbers by place value. https://cdn.kastatic.org/ka-youtube-converted/He4cjB2ectc.mp4/He4cjB2ectc.mp4 210 Subtraction of numbers less than 10,000 (with and without regrouping) 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 Subtraction of numbers less than 10,000 (with and without regrouping) 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 https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/strategies-for-subtracting-two-and-three-digit-numbers/v/methods-for-subtracting-3-digit-numbers 2026-03-26T05:40:45.96433927Z Methods for subtracting 3-digit numbers Subtract 357-156 using place value strategies. video https://cdn.kastatic.org/googleusercontent/GQ1U2c0010sMRcfWN6oei0r8_V1YPVYGahnWf6DW89z-oufNvzucHqFzsZGLruRGATy8-cm1P2-52j8fUc8ZV8hSHg Methods for subtracting 3-digit numbers Subtract 357-156 using place value strategies. https://cdn.kastatic.org/ka-youtube-converted/ZIiZkmaehsU.mp4/ZIiZkmaehsU.mp4 283 Subtraction of numbers less than 10,000 (with and without regrouping) https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/strategies-for-subtracting-two-and-three-digit-numbers/e/select-strategies-for-subtracting-within-1000 2026-04-30T18:30:41.846286703Z Select strategies for subtracting within 1000 Practice telling which strategies work for subtracting two numbers within 1000. Lindsay exercise 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 Subtraction of numbers less than 10,000 (with and without regrouping) https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/imp-subtracting-with-regrouping-within-1000/v/regrouping-when-subtracting-three-digit-numbers 2021-06-08T18:45:44Z Subtracting 3-digit numbers (regrouping) Sal uses regrouping (borrowing) and place value to subtract 629-172. Sal Khan video https://cdn.kastatic.org/googleusercontent/eqA638g7KlsTw_hKt5Sut3UEPErTLMBzSaCv2A8p3uvAdLxh3gwo1Pk_7bEA-iRRYJBKcWSWL3_Td6Zottg40CM Subtracting 3-digit numbers (regrouping) Sal uses regrouping (borrowing) and place value to subtract 629-172. https://cdn.kastatic.org/ka-youtube-converted/QOtam19NQcQ.mp4/QOtam19NQcQ.mp4 200 Subtraction of numbers less than 10,000 (with and without regrouping) https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/imp-subtracting-with-regrouping-within-1000/e/subtraction_4 2023-03-15T03:32:38.397005054Z Subtract within 1000 Subtract with 2 numbers less than 1000. Marcia Lee exercise https://www.khanacademy.org/kmap/numbers-and-operations-the-real-complex-number-system-192-202lp/x30cbe10bfecf22dc:addition-and-subtraction/x30cbe10bfecf22dc:strategies-for-adding-two-and-three-digit-numbers/v/estimating-adding-and-subtracting-3-digit-numbers 2022-10-07T06:47:27.151808908Z Estimating adding and subtracting 3-digit numbers Use estimation to find reasonable solutions to addition and subtraction problems. video https://cdn.kastatic.org/ka_thumbnails_cache/5ffda36e-d4ec-4e6f-9840-127dae529a6b_1280_720_base.png Estimating adding and subtracting 3-digit numbers Use estimation to find reasonable solutions to addition and subtraction problems. https://cdn.kastatic.org/ka-youtube-converted/cUKmbQjpu5A.mp4/cUKmbQjpu5A.mp4 209 Subtraction of numbers less than 10,000 (with and without regrouping) https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/estimate-to-subtract-multi-digit-numbers/v/estimating-when-subtracting-large-numbers 2022-10-06T09:25:13.606060383Z Estimating when subtracting large numbers Use estimation to find reasonable solutions to 2- and 3-digit subtraction problems. video https://cdn.kastatic.org/googleusercontent/TFk4wFixyX9CyaX8x8n3ecurte1HHPeN9CKocEHaaQLjMrowEYAfhCZyz5llKFxEKiuRDwPovR0oufZQIoPGcRY Estimating when subtracting large numbers Use estimation to find reasonable solutions to 2- and 3-digit subtraction problems. https://cdn.kastatic.org/ka-youtube-converted/de2aad2y03g.mp4/de2aad2y03g.mp4 187 Subtraction of numbers less than 10,000 (with and without regrouping) https://www.khanacademy.org/math/cc-third-grade-math/imp-addition-and-subtraction/estimate-to-subtract-multi-digit-numbers/e/estimate-to-subtract-multi-digit-whole-numbers 2021-04-29T08:01:37Z Estimate to subtract multi-digit whole numbers Use estimation to find a reasonable solution to multi-digit subtraction problems. Numbers are less than or equal to 1000. Charlotte Auen exercise