Posted by T. Reed on .
1 1/8 in. = how many miles?

Math 
Ms. Sue,
What is the map scale?

Math 
T. Reed,
1/8 in. = 10 mi.
1 1/8 in. = ? mi.
And you give the formula Ms. Sue 
Math 
Ms. Sue,
One way to solve this is by using a proportion. Cross multiply and solve for x.
(1/8) / 10 = (1 1/8) / x
1/8x = 11 1/4
x = (11 1/4) / (1/8)
x = 45/4 * 8 = 90 
Math 
T. Reed,
So Ms. My answer would be 90? But I'm still having a hard time understanding how you got your answer.

Math 
Ms. Sue,
Yes, the answer is 90.
Another way to approach this is to note that 1 1/8 is 9 times 1/8. So 9 * 10 = 90. 
Math 
T. Reed,
Ms. Sue how did you get 9?

Math 
Ms. Sue,
1 1/8 = 9/8

Math 
Ms. Sue,
8/8 + 1/8 = 9/8

Math 
T. Reed,
Thank you Ms. Sue we love you :)))!!