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Current time:0:00Total duration:2:37

Video transcript

let's do it let's do some examples of the writing expressions with variables exercise so it says write an expression to represent eleven more than a well you could just have a but if you want eleven more than a you would want to add eleven so you could write that as a plus eleven you could also write that as eleven plus a both of them would be eleven more than a so let's check our answer here we got it right let's do a few more of these write an expression to represent the sum of D and nine so the sum of D and nine that means you're going to add D and nine so I could write that as d plus nine or I could write that as 9 plus 9 plus D check our answer got that right let's do a few more of these write an expression to represent J minus 15 well I could just write it in with math symbols instead of what you writing the word minus instead of writing MI and us I could write J minus 15 and then I check my answer and got it right let's do a few more of these there's a lot of fun write an expression to represent seven times R well seven there's a couple ways I could do it I could use this little dot right over here who's seven times R like that that would be correct I could literally just write seven R if I just wrote seven seven R that would also count let me check my answer that's right let me do a couple of other of these just so you can you can see that I could have dust done 10 and this is not a decimal this is it's a little bit higher than a decimal it's multiplication and the reason why once you start doing algebra you use this symbol instead of instead of that kind of cross for multiplication is that that that that X looking thing gets confused with X when you're doing when you're using X as a variable so that's why this is a lot more useful so we want to write 10 times you 10 times you let's check our answer got it right let's do one more write an expression represent 8 divided by D so you could write it as 8 and then I could write slash like that 8 divided by d and there you go this is 8 divided by D let me check let me check the answer I'll do one more of these six divided by B same thing so six I could use this tool right over here it does the same thing as if I were to press the backslash so six divided by B check my answer and got it right