https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-add-sub-miss-value-prob/v/missing-numbers-in-addition-and-subtraction-within-100 2021-01-16T16:06:37Z Missing numbers in addition and subtraction Sal solves missing number in problems like 73 = ___ + 57. video https://cdn.kastatic.org/googleusercontent/hm2Yt6qC_oBR8C6ep-MMPJh3OIAIqW9rOkpZ6ldRl9SWsyG2TjzYJbq2vJ6usldukpFBuvHJ6_q-8HrTd5TZ388X Missing numbers in addition and subtraction Sal solves missing number in problems like 73 = ___ + 57. https://cdn.kastatic.org/ka-youtube-converted/zTK6XUF0HAs.mp4/zTK6XUF0HAs.mp4 344 Number sentences https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-100/cc-2nd-add-sub-miss-value-prob/e/find-the-missing-number-add-sub-within-100 2026-04-07T22:59:30.107127435Z Find the missing number (add and subtract within 100) Practice solving problems where you have to figure out the missing value in an addition or subtraction equation. All numbers are within 100. Lindsay exercise https://www.khanacademy.org/math/cc-third-grade-math/imp-multiplication-and-division/imp-more-with-1-digit-multiplication-and-division/v/unknowns-with-multiplication-and-division 2021-07-07T20:19:25Z Unknowns with multiplication and division Sal finds the missing number in multiplication and division equations. Sal Khan video https://cdn.kastatic.org/googleusercontent/i21Ja5VyAbcKPsO5e0U0JU-dremBeH2jhl07MzhYatRVPmTYPeqMIBt68y-JU3JISh3YQFDnFCsPlha0AAhAPgs Unknowns with multiplication and division Sal finds the missing number in multiplication and division equations. https://cdn.kastatic.org/ka-youtube-converted/TqAtt3g6Tkc.mp4/TqAtt3g6Tkc.mp4 318 Number sentences https://www.khanacademy.org/math/cc-third-grade-math/imp-multiplication-and-division/imp-more-with-1-digit-multiplication-and-division/e/finding-missing-factors--1-digit-multiplication- 2022-03-04T19:05:22.028065113Z Find missing factors (1-digit multiplication) Find missing factors in 1-digit multiplication problems. Products are less than or equal to 100. Lindsay exercise https://www.khanacademy.org/math/cc-third-grade-math/imp-multiplication-and-division/imp-more-with-1-digit-multiplication-and-division/e/division_1 2021-06-30T16:39:16Z Find missing divisors and dividends (1-digit division) Find missing divisors and dividends in 1-digit division problems.  Quotients are less than or equal to 10. Marcia Lee exercise