tag:blogger.com,1999:blog-4242439961617529545.post7847254991189936543..comments2016-10-22T21:32:53.566+01:00Comments on Resourceaholic: Multiplying NegativesJoanne Morgannoreply@blogger.comBlogger4125tag:blogger.com,1999:blog-4242439961617529545.post-91449788228545103372016-09-10T20:04:54.544+01:002016-09-10T20:04:54.544+01:00Thanks for the great post, food for thought for Mo...Thanks for the great post, food for thought for Mondays lesson.<br /><br />I like to ask pupils what it means if I say you must shout out the answer to this question. (+)<br /><br />Then you must not shout out the answer...that's +1*-1=-1<br /><br />Then you must not, not shout out the answer... that translates to -1 * -1 = +1.<br /><br />A nice logic puzzle that links to language and links Neil Dicksonhttp://www.blogger.com/profile/14678642470782711641noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-7203877254541428182016-08-26T16:53:35.097+01:002016-08-26T16:53:35.097+01:00Thank you both for these comments, really helpful ...Thank you both for these comments, really helpful Joanne Morganhttp://www.blogger.com/profile/11919801458664779971noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-11362218838369626242016-08-23T04:06:31.267+01:002016-08-23T04:06:31.267+01:00I talk about how (-1) means "the opposite&quo...I talk about how (-1) means "the opposite" (as in the opposite of 8 is -8 translates in math to be (-1)(8)=8). So using the property of -1 and the community property you could rewrite (-5)(-4) as (-1)(5)(-1)(4) then that can rearrange to (-1)(-1)(5)(4). So since "the opposite of a negative is a positive", that means (-1)(-1)=1, and then 5(4) =20. After we do that a few times Debbie Bodenhttp://www.blogger.com/profile/04923042609627799944noreply@blogger.comtag:blogger.com,1999:blog-4242439961617529545.post-55510099185784168692016-08-21T22:38:01.382+01:002016-08-21T22:38:01.382+01:00I sometimes use car depreciation. I show a table...I sometimes use car depreciation. I show a table of a car's value, decreasing at 2000 per year. (Yes, I tell 'em life isn't that simple.) <br /> If I want to know how much its value has changed I can multiply the number of years by 2000. If I go bakc in time, that would be negative time -- and of course it would be worth more <br /> This doesn't stand a *chance* SiouxGeonzhttp://www.blogger.com/profile/14852040976080951492noreply@blogger.com