00:03
Okay, so i see that you need help with this problem and it says we can use pattern blocks to model addition and subtraction, so it gives examples of how to do this and it says that you can use this website here, so i have this website up it wants you to model these two problems so one half plus one third so see we're going to do first do one half plus one third so one half if i take this hexagon and use the manipulative for it one half and then i'm going to take another hexagon and i'm going to do one third so that would be this and this one in this one, okay, so that's one half because there's two halves here and each piece is a third here so now i want to take this one half in this one third and in the background so i have this missing i have one slice missing out of this piece so i have one six missing so all together if i was to figure out how many six that there are there's one two three oops three four five so that's a total of five six so that equals five six so that's for the first one.
02:11
I'm gonna trash this delete selected objects.
02:18
Oh oops and oops and all right, i'll just do actually, i can erase this all right.
02:48
Next one is one half plus two thirds one half plus two thirds so this one half and then we already established that these are thirds so if i'm going to add two thirds to that i need two of these but i want you to notice something if i have two of these this piece is not going to fit in but look half of it will fit in so i'm going to use two of these because both of these together equal one of these so then i have now that's a full whole and then one six, so this equals one in one six, so equals equals one in one six because that's a whole and then this piece right here is one six a whole is the number one plus one six equals one in one six okay going to erase this and do the last one and i'll separate all of these see hmm, okay, it's not letting me move these start over yes, oh didn't see that one first.
04:43
Okay, last one 1 12 plus 1 3rd so we have one one 12 plus 1 3rd okay.
04:57
So now i need to figure out 112 of this whole entire shape so, let's say i have this shape and this is one six...