Using the Distributive PropertyDate: 08/23/2001 at 20:17:06 From: Jennifer Cmajdalka Subject: Distributive property My math teacher told us to work problems like this: a(b-c)= ab-ac If we do them like that, then how do I do these problems? 67(40) AND 210(800) I hope you can help me! She said not to do multiplication on that, but to work it the way you work a distributive propery. HELP! Thanks! Jen Date: 08/24/2001 at 16:33:52 From: Doctor Ian Subject: Re: Distributive property Hi Jen, I think what she wants you to do is to break one of the terms up into a sum, e.g., (49)70 = (40 + 9)70 = (40)70 + (9)70 = 2800 + 630 = 3430 Actually, this is a good trick to use to do multiplication in your head, so it's worth spending a little time practicing it. But mostly, I think she wants you to get used to looking for opportunities to apply the distributive property, since once you get to algebra, it's going to be one of your best friends! Does this help? - Doctor Ian, The Math Forum http://mathforum.org/dr.math/ Date: 08/24/2001 at 20:17:06 From: Jenny L Cmajdalka Subject: Re: Distributive property Thank you for helping me! That is what she wanted! Jen |
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