Missing numbers in addition and subtraction | 2nd grade | Khan Academy
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Missing numbers in addition and subtraction | 2nd grade | Khan Academy
Sal solves missing number in problems like 73 = ___ + 57. Watch the next lesson: https://www.khanacademy.org/math/cc-2nd-grade-math/cc-2nd-add-subtract-1000/cc-2nd-add-ones-tens-hundreds/v/adding-ten-or-one-hundred?utm_source=YT&utm_medium=Desc&utm_campaign=2ndgrade Missed the previous lesson? https://www.khanacademy.org/math/cc-2nd-grade-math ...
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