kantalek kantalek

15-02-2017
Mathematics

contestada

Susan solved 200-91 and decided o add her answer to 91 to check her work. Explain why this strategy works

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PatDoesGaming33 PatDoesGaming33

16-02-2017

This strategy works because you would want to make sure that the two numbers add up to the number you subtracted it from. Hope this helped and have an awesome day!

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18-02-2017

109+91=200 it works because of the missing number is now placed in the equation

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