Question

800x490помагите я не знаю

Answer 1

800 * 490 =392 000

можно разложить число 490 на ( 400 + 90 ) и решать так: 

800 * 400 +800 * 90 = 320 000 + 72 000 = 392 000

 

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Answer 2

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Some additional sentences are:

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