2/5 (-7) 5/2 as you know 2/5 x 5/2 = 1
so 1 x (-7) = -7
so the asnwer is -7
If i'm mistaken; he needs to buy 3 sheets?
Depends on if you think it is bbg
Rules for adding: if the bases are the same you can add them, and subtracting happens in a fraction
I think this is right
all you need to do is:
235-123= 112
then to make sure its correct you do:
123+112= 235
Hope this has helped you. :)