2 + 5 = 7
2
5+2=7
There are too many to list. Some examples:2+2+2+2+...+2 (35 lots of them). 7+7+7+7+7+7+7+7+7+7 2+2+2+2+2+2+2+2+2+2+3+3+3+3+3+3+3+3+3+3+5+5+5+5+5+5+5+5+5+5
2/5 + 2/7 = 24/35 2/5 + 2/7 =(2/5 * 7/7) + (2/7 * 5/5) =14/35 + 10/35 =24/35
{2, 2, 5, 6, 7} {2, 2, 5, 6, 7} {2, 2, 5, 6, 7} {2, 2, 5, 6, 7}
2800 = 2 * 2 * 2 * 2 * 5 * 5 * 7 = 2^4 * 5^2 * 7
-7
7
7
-5 + +7 = -5 + 7 = +2 = 2
Guessing that is: 9 2/7 - 6 5/7 = (8 + 1 + 2/7) - 6 5/7 = (8 + 7/7 + 2/7) - 6 5/7 = 8 9/7 - 6 5/7 = 2 4/7 Alternatively, using improper fractions: 9 2/7 - 6 5/7 = (9x7+2)/7 - (6x7+5)/7 = 65/7 - 47/7 = 18/7 = (2x7+4)/7 = 2 4/7