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2 years ago

110,568÷220−568÷220 Calculate efficiently in your head.

Mathematics

2 answers:

julsineya [31]2 years ago

8 0

Answer:

500?

Step-by-step explanation:

AveGali [126]2 years ago

3 0

Answer:

500

Step-by-step explanation:

Mental calculation often makes use of factoring and cancelling of factors. To the greatest possible extent, multiplying or dividing by powers of 2, 5 and 10 are also used.

$\dfrac{110568}{220}-\dfrac{568}{220}=\dfrac{110568-568}{220}=\dfrac{110000}{220}\\\\=\dfrac{110}{220}\cdot1000=\dfrac{1}{2}\cdot1000=\boxed{500}$

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vova2212 [387]

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Step-by-step explanation:

Given

$y\ \alpha\ \frac{1}{x^2}$

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First, convert to equation

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Where k is the constant of proportionality

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$Y = \frac{k}{(x - 0.5x)^2}$

$Y = \frac{k}{(0.5x)^2}$

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Expand

$Y = \frac{1}{0.25} * \frac{k}{x^2}$

Substitute $\frac{k}{x^2}$ for y

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