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This expectation represents major work of the grade.
In Grade 1, this expectation connects with representing and solving problems involving addition and subtraction and with adding and subtracting within 20.
How can you use the number line to show how you might use adding OR subtracting to solve the same problem?
How could you explain why 3 + 8 and 8 + 3 both equal 11?
In previous grades, students model and describe addition as putting together and adding to, and subtraction as taking apart and taking from, using objects or drawings.