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L20_Wed_Mar_03_filled - MAE3811Sp. 2010 Mahoney1 Mental...

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1 MAE3811–Sp. 2010 Mahoney–1 Mental Mathematics: These are _______________ or strategies for doing computation work in ones mind/head and not on paper. It includes ______________ of numbers. Why might this be useful? Seriously, share your opinions? We’ll review some of these and shows the steps on paper [electronically] but the idea, remember, is that you wouldn’t do them on paper. They do require a little bit of creativity sometimes and they do not work for every single problem, that’s what the __________ and _________ algorithms are for. MAE3811–Sp. 2010 Mahoney–2 Mental Mathematics Addition Part I: Adding from the left: 56 + 47 Add from the left, Doubles: 47 + 47 Breaking up and Bridging: 56 + 47 Trading Off: 56 + 47 Trading Off: 56 + 19
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2 MAE3811–Sp. 2010 Mahoney–3 Mental Mathematics Addition Part II: Use Compatible Numbers: 120 + 20 + 40 + 130 + 170 + 90 + 120 Make Compatible Numbers: 63 + 29 Mental Mathematics Subtraction Part I: Breaking up and Bridging: 58 - 47
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This note was uploaded on 07/22/2011 for the course MAE 3811 taught by Professor Mahoney during the Spring '11 term at University of Florida.

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L20_Wed_Mar_03_filled - MAE3811Sp. 2010 Mahoney1 Mental...

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