Videos

Integers Method B Using number Line

Added Sep 20, 2015 •

Copy this URL:
Embed code:	<iframe class="edlio-embed-player" type="text/html" width="640" height="360" src="//www.oswaltacademy.org/apps/embed/?v=88755" frameborder="0" allowfullscreen></iframe> Change dimensions

This video explains how to add and subtract integers using a number line.

Show Transcript

continuing on with her method hears method V this is more common used on most Math teachers to find which is our objective putting two integers together he might look without a problem look at 5 + -8 first and there's our number line  endless look at the first rule the first name says the first number the first very first number right here  the first number is the starting point so you can apply that on the line wait a minute it doesn't have a sign in front of it where do I fly to the right which is positive or left pawsitive we know it's going to be the right of the number line  so we start with that that's our starting point five starting point now so now we do now what next set of rules this is look for any two signs next next to each other so as we take what four signs signs are adding and subtracting adding subtracting sign so look for any two signs that are next to each other they should have been Step 1 taking a look at the sign here there's nothing next to it no worries we're going to read left it right just like an order of operations next place we have a son  are those two next to each other or next to each other it's the same sign changed to add these two I don't see the same sign so it's not that  is it other one down here says if it's a different sign changed to subtraction haha they're different signs so that's what I'm going to do will take these to unlock turn that into Latin alright  next step is you always have to go write your problem  -8  let's do the same thing let's take a look over here in our next problem for we go 1 hour finish up so it's five- I'm not I'm still sitting here in the same spot anything so it says if it's a plus go right I'm reading right down here it says it's a plus go right no poop in it ain't that  if it's a negative you go left let's see where it's a negative so I got to go left what is that mean on the number line we're going to go that direction  yeah how many  should I got to go back up here and look at the number to take a look at the number here this is what I'm looking at right here so I need to go left play mr. Frogger here I'm going to go this is my starting point was right here I'm going to go 8 1 2 3 4 5 6 7 8 I'm at negative 2/3 whatever equals -3 what I didn't get it off okay let's try to get a problem race race race race Stratos boat will it rain next it says negative -3 is our starting point Siri is right there set that step 1 Step 2 or any signs next to weather  well taking a look here let's change that to 4 play Signs next to each other yeah we have this sign here and this sign here in are they next to each other absolutely they're next to each other so need to change that change that to your two- Sons I don't remember what do I do same sign I'm here I'm going to add are the same sign they are there negative negative so we're going to add so change that to a place rewrite the problem I know you guys don't like to do that but you got to rewrite the problem so you can see everything race that at  so now I'm taking care of three already in this so 3 is done now I just got to take tear it up plus I go Plus  you go right you go right to wherever you're at so I'm here right here and now I got to go write that direction  how many to go write 5 so then I do believe Frogger again one two three four five I'm at positive two equals positive two well that's kind of short and easy there you go this works on all energy numbers at a time

Videos

Integers Method B Using number Line

More videos in 7th Grade