standard_description: Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = �� – 3, 6 + 6 = ��.
problem_activity: Task
Compare the number of circles in each box. If they are equal, write a number sentence. For example:
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$$4+3=5+1+1$$
If they are not equal, write "not equal."
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aligns: no