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wintersuntime
 one year ago
Can someone be nice enough to help me please with this worksheet >
http://crsearch.fcps.edu/crsearch/retrieveresourcefile.cfm?hxresid=R001EED
wintersuntime
 one year ago
Can someone be nice enough to help me please with this worksheet > http://crsearch.fcps.edu/crsearch/retrieveresourcefile.cfm?hxresid=R001EED

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wintersuntime
 one year ago
Best ResponseYou've already chosen the best response.0It's the one of building staircases

dan815
 one year ago
Best ResponseYou've already chosen the best response.1what are you confused about?

wintersuntime
 one year ago
Best ResponseYou've already chosen the best response.0about how to get 100

dan815
 one year ago
Best ResponseYou've already chosen the best response.1could you please ask your question clearly about what is confusing you

wintersuntime
 one year ago
Best ResponseYou've already chosen the best response.0what is the total numbers of cubes how many steps I need in 100

dan815
 one year ago
Best ResponseYou've already chosen the best response.1you see how the number of cubes needed is increasing for each step

wintersuntime
 one year ago
Best ResponseYou've already chosen the best response.0yes but I need to find out the total number of cubes

dan815
 one year ago
Best ResponseYou've already chosen the best response.1right look at this pattern

dan815
 one year ago
Best ResponseYou've already chosen the best response.1for 1 step its 1 for 2 its 1+2 for 3 its 1+2+3 for 100 its 1+2+3+4....+99+100

dan815
 one year ago
Best ResponseYou've already chosen the best response.1you have to see what the sums upto

dan815
 one year ago
Best ResponseYou've already chosen the best response.1there is a trick to find out what that sums upto

dan815
 one year ago
Best ResponseYou've already chosen the best response.1if you add the first and last together the 2nd and 2nd last the 3rd and 3rd last they all give u the same number

dan815
 one year ago
Best ResponseYou've already chosen the best response.1how many of those additions will there be if u add this way

dan815
 one year ago
Best ResponseYou've already chosen the best response.1there is another way to look at it

dan815
 one year ago
Best ResponseYou've already chosen the best response.1lets take a simpler example

dan815
 one year ago
Best ResponseYou've already chosen the best response.1what you can do is rewrite another replica of it backwards 1+2+3+4+5=? 5+4+3+2+1=?  6+6+6+6+6= 5*6  we added 2 sums we only want to find out 1+2+3+4+5 so we divide 5*6 by 2= 5*6/2= 30/2=15 so 1+2+3+4+5=15

dan815
 one year ago
Best ResponseYou've already chosen the best response.1we can use this same trick for this 1+2+3+4+5+6.....99+100

dan815
 one year ago
Best ResponseYou've already chosen the best response.1can you figure that out

wintersuntime
 one year ago
Best ResponseYou've already chosen the best response.0so for 100 its 99

dan815
 one year ago
Best ResponseYou've already chosen the best response.1lets do a smaller example how about 1 to 10

dan815
 one year ago
Best ResponseYou've already chosen the best response.11+2+3+4+5+6+7+8+9+10=? remember the trick from before?

dan815
 one year ago
Best ResponseYou've already chosen the best response.1lets add this set back to itself

dan815
 one year ago
Best ResponseYou've already chosen the best response.11+2+3+4+5+6+7+8+9+10=? 10+9+8+7+6+5+4+3+2+1 =? now add each column  11+11+11+11...+11 =? how many 11s will there be?
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