Lesson Playlist: Missing Numbers in Addition and Subtraction Equations Mathematics • 2nd Grade
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00:58Determining an Unknown Whole Number in a Subtraction Equation
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01:01
Adding a Two-Digit Number and a Multiple of 10 by Finding the Missing Addend
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01:23
Finding the Unknown Subtrahend in Subtraction Sentences with Numbers up to 20
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01:06
Finding the Unknown Minuend in Subtraction Sentences with Numbers up to 20
