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Once two boys were heading to school...
Hey John, have any idea what we are doing today?
Yes, I think we are doing addition and subtraction.
Kids, today we are going to add, subtract, and word problems.To add you have to combine two numbers.To subtract you have to separate two numbers.
Sometimes you have to round or estimate.An addition or subtraction problem is called an operation.The answer to an addition problem is called the sum & the answer to a subtraction problem is called the difference. And in word problems we use strip diagrams, equations, and variables.
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