5th grade math
posted by alex .
two numbers are reciprocals of each other and one of them is four times as large as the other. what are the two numbers?

n= 4(1/N)
n(n)=4
n=+2
so we have 2,1/2 as the numbers, or 2, 1/2 as the numbers. 
thanks....I haven't even been shown that way to figure it out. Thanks so much!

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What. Do you do differently to solve these two subtraction problems