07 division by doubling method

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The forum discussion focuses on the doubling method for division, specifically applied to the calculation of 972 divided by 69. The method involves sequentially doubling the divisor, 69, to derive intermediate values such as 138 and 276. The discussion highlights a potential misunderstanding regarding the variable "a" equating to 100, emphasizing the correct application of the doubling technique to achieve accurate results.

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karush
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use doubling method
$\dfrac{972}{69}$
$1 \to \boxed{69}+\boxed{a}=\boxed{?}$
$2 \to \boxed{138}+\boxed{b}=\boxed{?}$

is a 100 then what is b?
 
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Where did you get "a= 100"? The title says "doubling". I would say 69+ 69= 138, then 138+ 138= 276.
 

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