jacquieyolimar jacquieyolimar

05-04-2020
Mathematics

contestada

Katie knew that 70 + 70 = 140. Explain how she can use this double to solve 70 + 89.

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puppy16334 puppy16334

05-04-2020

Just add 19 to 140.

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oofasoof oofasoof

05-04-2020

She can use this double by first finding the different in between 70 and 89, which is 19. After finding that difference she should add 19 to the result of the double.

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