20
13 + 21 - 7 + 12 = 15
true. 5+3=8 8+7=15 5+7=12 12+3=15
83
-12 + 6 - 10 - 6 +15 = -7
7/12+8/12 = 15/12 15/12 = 5/4 or 1.25
The sum of 7/15 and 5/12 equals 53/60
7 and 10/15 + 2 and 12/15 = 9 and 22/15 = 10 and 7/15
8/12 +7/12 =15/12 = 1 1/4
15/7 + 12/5 = 75/35 + 84/35 = 159/35
5 over 8 as a fraction plus 7 over 12 = 15/24
12 + 15 + 63 + 12 + 24 + 34 + 23 + 15 = 198
8