• Lightbulb The student must be able to determine the value of a missing number in an equation. They must be able to explain their reasoning and tell how they know the resulting value makes the number sentence true.  


  • Complete the following number sentence to make it true. Explain your solution and thinking and how you know your answer is correct.
                    12 + 3 = _____ + 5



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  • 1.5 Algebraic reasoning. The student applies mathematical process standards to identify and apply number patterns within properties of numbers and operations in order to describe relationships. The student is expected to:

    (F) determine the unknown whole number in an addition or subtraction equation when the unknown may be any one of the three or four terms in the equation


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