Its 2 (plus)
14
It is: 7/15 times 5/14 = 1/6
14
14.714285714285714285714285714286 times
5
5/7 - 7/14 becomes: 10/14 - 7/14. Then subtract across to get the final answer: 3/14. 5/7 became 10/14 by finding the lowest common denominator which is 14. Then you figure 7 goes into 14 two times, and 2x5 = 10 therefore 5/7 becomes 10/14.
You can, if you have a square with side 5 you can multiply 5*5=25 or you can add 5+5+5+5+5=25 If you want to do this just take one of the numbers and add it to itself the other numbers times. so if you have 7*8 you add 7 to itself 8 times, so add 8 7's 7+7+7+7+7+7+7+7=56 or add 7 8's 8+8+8+8+8+8+8=56 Multiplying is much easier.
-19
if you do -5 x -7 like with positive numbers 5 x 7 equals 35 then with negative numbers the answer is -35 and then add 14 to it and the answer would be 21
(1/7) + (3/14) = (2/14) + (3/14) = 5/14
5/8 x 4/7 is 5/14
14 It goes into 70 5 times and 14 once