Jump to content

Recommended Posts

Tara    0

I am not sure how to work the answer in exercise 1.4. 1(h)?  I have the answers, but I am looking for a book that might have the worked out solutions.  I have only the answers for try it.  Does Jennifer Horst write a book for demensions 7a? 

Edited by Tara
Another question

Share this post


Link to post
Share on other sites
Jenny    3

There is a book that has worked out solutions, see http://www.singaporemath.com/Dimensions_Math_Teaching_Notes_7A_p/dmtn7a.htm

Do you mean how to find the lowest common multiple of 65 and 91? You have to find the factors. 65 = 5 x 13, 91 = 7 x 13, so the LCM is 5 x 7 x 13.

5 is an obvious factor of 65, once you find the other factor, that sort of gives it away, and might let you think of trying 13 for 91. Even if not, 2 won't work for 91, nor any even number, nor 3 since 9 + 1 = 10, nor 5, so next one to try would be 7.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×