30 times by 6 because it goes down by 6 which is 180 and take awat from 12 which is -168
And don't forget that it is a negative. so leave a minus before the number.
First get the same denominator 2/5=4/10 so from here do 7/10-4/10 the denominator stays the same and the numerator changes, 3/10 is the answer so Heather live 3/10 of a mile closer to the library than the school
1 | 2.5
2 | 5
3 | 10
4 | 20
5 | 40
6 | 80
7 | 160
8 | 320
9 | 640
Hopes this helps!!!
