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04-02-2016
Mathematics

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26.5 - 9.3 using compensation

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Аноним Аноним

04-02-2016

26.5 - 9.3 = ?

26 - 9 = 17
.5 - .3 = .2

17 + 0.2 = 17.2

Answer : 17.2

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04-02-2016

[tex]26.5 - 9.3 = (26 + 0.5) - (9 + 0.3)\\\\= 26 + 0.5 -9 -0.3\\\\=26 - 9 + 0.5 -0.3\\\\=17 + 0.5-0.3\\\\=17 + 0.2\\\\=\boxed{\bf17.2}}[/tex]

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