https://www.khanacademy.org/math/cc-kindergarten-math/cc-kindergarten-counting/kindergarten-teens/v/monkeys-for-party 2021-06-24T11:10:09Z Teen numbers: monkeys Sal breaks the number 18 into 10 and 8. Sal Khan video https://cdn.kastatic.org/googleusercontent/CVE0MUDz6mxXcJQOAqHG32imbspwiSHU9xk-V8DxthJhI5t5ufzq4kuDWwKMix9ciTQMCD27r9zIKfspY9BXiJu_0Q Teen numbers: monkeys Sal breaks the number 18 into 10 and 8. https://cdn.kastatic.org/ka-youtube-converted/zqwVKhQV_2w.mp4/zqwVKhQV_2w.mp4 178 Addition within 100 (without regrouping)* https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-add-100/v/adding-two-digit-numbers-without-regrouping 2021-06-24T11:10:10Z Adding 2-digit numbers without regrouping Sal adds 23 + 45 thinking about place value. video https://cdn.kastatic.org/googleusercontent/aHJeEmGMU9FLixIOC6lZRtbi7m-PtaxSZUsA2HzIBEc28aTWyJlzs2nBYi96OKZT3a4blcH53hOgemy61KD828U Adding 2-digit numbers without regrouping Sal adds 23 + 45 thinking about place value. https://cdn.kastatic.org/ka-youtube-converted/K5rmfHlHy20.mp4/K5rmfHlHy20.mp4 154 Addition within 100 (without regrouping)* https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-add-subtract/cc-1st-add-two-dig-intro/v/adding-two-digit-numbers-no-regrouping 2021-06-24T11:10:10Z Adding 2-digit numbers without regrouping 1 Sal adds 71 + 24. video https://cdn.kastatic.org/googleusercontent/IvbAIEVP6EeKusoVBSkQ5R0oNqekZakJxdDc1AnE4njqQUSBdPTSXod9bIxwa2QEMo7aPZipE_kn2qEYHsOuq8quyw Adding 2-digit numbers without regrouping 1 Sal adds 71 + 24. https://cdn.kastatic.org/ka-youtube-converted/EV38zfiY6Vs.mp4/EV38zfiY6Vs.mp4 113 Addition within 100 (without regrouping)* https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-add-100/v/understanding-place-value-when-adding-ones 2021-06-24T11:10:09Z Understanding place value when adding ones Sal adds 37 + 2 by thinking about place value. video https://cdn.kastatic.org/googleusercontent/suPl8aA7-kHcmKdFyNSEzuNSUiLIxG6pQNq_aEK8VnUpjfB-P5pArtqnKpJjmNSpCkcOMM7rI2Fwx42_btWY2OY Understanding place value when adding ones Sal adds 37 + 2 by thinking about place value. https://cdn.kastatic.org/ka-youtube-converted/7_QPAdHILzw.mp4/7_QPAdHILzw.mp4 156 Addition within 100 (without regrouping)* https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-add-100/v/understanding-place-value-while-adding-tens 2021-06-24T11:10:10Z Understanding place value when adding tens Sal adds 23 + 30 by thinking about place value. video https://cdn.kastatic.org/googleusercontent/6maBE8dKBgp9XhS7vwVX-hMUzKocEu8HlDNUzCOruU6ifVeYIoJpmZl4PTmsdWba8K2XY9efVObpUQgzr1ZvwD1d Understanding place value when adding tens Sal adds 23 + 30 by thinking about place value. https://cdn.kastatic.org/ka-youtube-converted/Dy5uDkOoMNc.mp4/Dy5uDkOoMNc.mp4 196 Addition within 100 (without regrouping)* https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-add-subtract/cc-1st-add-ones-tens/v/comparing-adding-1-and-10 2021-02-15T02:44:58Z Adding 1 vs. adding 10 Sal talks about the difference between adding 1 and adding 10. video https://cdn.kastatic.org/googleusercontent/_8jKI-fgx7SsNG5bhsJq744a4mmhtmAU59qEZNCMfomutB2M_cGm9YIfdSnj9Mu-jsas_Nug8GlJJVFlWgoL_TGU Adding 1 vs. adding 10 Sal talks about the difference between adding 1 and adding 10. https://cdn.kastatic.org/ka-youtube-converted/mKsKU0BAiRM.mp4/mKsKU0BAiRM.mp4 137 Addition within 100 (without regrouping)* https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-add-subtract/cc-1st-add-ones-tens/e/add-within-100--level-1 2026-04-07T23:17:37.123726494Z Add 1 or 10 Practice solving problems like 34+1 and 34+10. Casey McCann exercise https://www.khanacademy.org/math/cc-1st-grade-math/cc-1st-add-subtract/cc-1st-add-ones-tens/e/adding-1s-or-10s-to-two-digit-numbers 2026-04-07T23:17:37.123726494Z Add 1s or 10s (no regrouping) Practice solving problems like 34+5 and 34+50. Cam exercise https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-add-100/e/addition_3 2026-03-24T23:41:07.080866137Z Add within 100 using place value blocks Practice adding numbers within 100 using place value blocks. Lukas Domagala exercise https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-add-sub-100-word-problems/v/fence-posts-for-horses 2021-06-24T19:33:07Z Addition word problem: horses Sal solves an addition word problem with numbers less than 100. video https://cdn.kastatic.org/googleusercontent/KRm-00RX3fIYRn8wC1xi8e6mcwcZu2ySSu3WdRIvpMHyVAmOVuY2ncJ6TyuWHL7Vq8onHrvZWcfQUDXCpdXpjR4O Addition word problem: horses Sal solves an addition word problem with numbers less than 100. https://cdn.kastatic.org/ka-youtube-converted/1dZsuE0vxEI.mp4/1dZsuE0vxEI.mp4 211 Addition within 100 (without regrouping)* https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-add-sub-100-word-problems/e/addition-and-subtraction-word-problems-within-100--level-1 2026-04-08T01:15:04.085520103Z Addition word problems within 100 Practice solving addition word problems. Numbers used are 100 or less. elizabeth exercise