68 x 78 = 5304
68/78 = 34/39
(78 + 42 + 68 + 52) / 4 = 60
78+78-:(85)/(78)+7,879=1405
78 + 89 + 167 + 897 + 78 = 1309
The GCF is 2.
55 + 82 + 92 + 78 + 100 + 96 + 78 = 581
78 + 78 = 156
1, 2, 4, 17, 34, 68 1, 2, 3, 6, 13, 26, 39, 78
78
The answer is 623. Simply add up all of the numbers arithmetically like you would for two plus two. To make sure the answer is correct, check your work using a calculator.
84+73+78 = 235.