https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-math-strategies-for-adding-within-100/v/breaking-apart-two-digit-addition-problems 2021-06-24T11:10:10Z Breaking apart 2-digit addition problems Sal thinks about different ways to break up addition problems.  video https://cdn.kastatic.org/googleusercontent/KPcEkaLVN9Bs15WtpTSvPdpA0sigmoWLfzm8TObNUPZqZ2hRtYE1p-OeQDK5ZZ6KOUZPfNgAR3K7Q6DWTmcCZvAtqg Breaking apart 2-digit addition problems Sal thinks about different ways to break up addition problems.  https://cdn.kastatic.org/ka-youtube-converted/UjfmOmPARyk.mp4/UjfmOmPARyk.mp4 288 Strategies for adding within 100 https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-math-strategies-for-adding-within-100/e/breaking-apart-two-digit-addition-problems 2021-04-29T07:57:29Z Break apart 2-digit addition problems Practice breaking apart problems like 23+45 into problems like 20+40+3+5. Lindsay exercise https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-math-strategies-for-adding-within-100/v/addition-using-groups-of-10-intro 2021-06-24T19:33:07Z Adding 53+17 by making a group of 10 Sal adds 53+17 by breaking apart the numbers and making a group of 10. video https://cdn.kastatic.org/googleusercontent/1F2_nuZjAIu80iLaUbXyGlTApLgIEuqk6IarUl5IW8qTKaOuIZD_epFEcFp0qaowVFi25IZtDX-B8_R-fC0o7BLG Adding 53+17 by making a group of 10 Sal adds 53+17 by breaking apart the numbers and making a group of 10. https://cdn.kastatic.org/ka-youtube-converted/Q35CH9B3tvc.mp4/Q35CH9B3tvc.mp4 216 Strategies for adding within 100 https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-math-strategies-for-adding-within-100/v/adding-by-getting-to-group-of-10-first 2021-06-24T19:33:07Z Adding by making a group of 10 Sal adds 5+68 by breaking the 5 into a 2 and a 3. video https://cdn.kastatic.org/googleusercontent/-uz_7SXu4tIiihh7ZwecHu3CVQd903F_l6W-g433-xf2m1xim7O5Q2yuyV6A9s9DJPcEq5yXBoJkQcfpWcG6zG80 Adding by making a group of 10 Sal adds 5+68 by breaking the 5 into a 2 and a 3. https://cdn.kastatic.org/ka-youtube-converted/DzJvR56Suss.mp4/DzJvR56Suss.mp4 170 Strategies for adding within 100 https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-math-strategies-for-adding-within-100/e/making-100 2026-04-08T01:15:04.085520103Z Add 2-digit numbers by making tens Practice adding two-digit numbers by making groups of ten.  Lindsay Spears exercise https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-math-strategies-for-adding-within-100/v/example-exercises-on-ways-to-add-two-digit-numbers 2021-06-24T19:33:06Z Strategies for adding 2-digit numbers Sal goes through multiple strategies for adding 2-digit numbers. video https://cdn.kastatic.org/googleusercontent/Dc1DBnCBDQ3eqejQ5j5hQP8dZJ0l9eJMafRdQ4SUNJNSTC-fOTKuRUzeGMY8IWeYQKldWWqESdV1atzJKqWtJGbemQ Strategies for adding 2-digit numbers Sal goes through multiple strategies for adding 2-digit numbers. https://cdn.kastatic.org/ka-youtube-converted/kMHFY6ZrKbU.mp4/kMHFY6ZrKbU.mp4 196 Strategies for adding within 100 https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-math-strategies-for-adding-within-100/e/select-strategies-for-adding-within-100 2021-04-29T08:02:11Z Select strategies for adding within 100 Practice telling which strategies work for adding two numbers within 100. Lindsay exercise