PRESENTATION OUTLINE
The question is adding or positives, the equation is 2/7 plus -4/5.
First do 2 times 5 plus -4 time 7 which equals -18, Then do 7 times 5 which equals 35 which is -18/35
The problem is 2 and 3/5 minus -4/3 minus 2/5
First 2 and 3/5 times 7 minus -4/7 times 5 minus 2/5 times 7 which equals 97/35 which equals 2 and 27/35
The problem is 2/9 times 3/14 times 4/12 times 6/16
First do 2/3 times 3/14 and cross cancel and you will get 2/42 then cross cancel 4/12 times 6/16 and you will get 2/24. 2/42 times 2/24 which equals 1/252
The problems is -3/8 divided by -2/5
-3/8 divided -2/5, First do -3/8 time 5/2 because of KCF which equals -15/16
