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The way you know that your answer is correct is if it is addition it has to be more and if its subtraction its less than your numbers.

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it is solving and finding the rigth amont altogether

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You can answer the question your shelf and see if the persons answer is reasonable.

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reasoning is to make sure your work is reasoning so other people can read it

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I know that it is reasonable because when you are subtracting it is less then. Also when you are adding it is greater than.

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i know the reasonbale is you are solving and finding the answer to the number altogether

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I know that it is reasonable because when you are subtracting it is less than.Also when you are adding the number is going to be greater than.

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you can write the anser on the paper and then explain it

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i  know that its reasonable because you can like add

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When you are finedind the difference.

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I know it is reasonableness because I can see if it is even or odd and I will find the  answer

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i know that reasonable is bye solving and and find the sum and the diffence and bye using a fact family

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I know it is reasonable because by looking at it is not a smaller number because there are to many to count

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i can rad to chak my asr

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I can see if the number is reasonable By seeing if it is bigger or smaller than the real number.

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an answer that makes sene based on  the problem   if u soulv it using any lurning resource

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the way I know if the answer is reasonable is by sloving it with fact family because it doesn't matter if it is adding or subtraction.

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i think it is 67 or57 .it is clost to it.