To find the difference between the numbers, she must add the values of the spaces between 3/10 and 1, and between 1 and 1 3/5
we can see this in the image:
The mistake she made is that the first distance is 7/10, not 3/10, and thus, the distance is the sum:
[tex]\frac{7}{10}+\frac{3}{5}[/tex]
The highlight of the mistake is:
which gives us the result:
[tex]\frac{7}{10}+\frac{3}{5}=\frac{7}{10}+\frac{6}{10}=\frac{13}{10}[/tex]
Answer: 13/10
