18-06-2017
Mathematics

contestada

In a party, each member invited takes a number to be served. if the first member took the number 32 and he last member took number 520. How many members were there that day?

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duanolivia duanolivia

18-06-2017

for problems like this, subtract the bigger number - smaller number, then add 1 back

so 520 - 32 + 1 = 489

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