668 + 489 = 1157.
6 - 4 + 8 - 9 = 1
9 + 6 + 9 + 6 + 9 + 8 + 5 + 2 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 99
4 + 5 + 6 + 7 + 8 + 9 = 39
9 + 8 + 7 + 6 + 5 + 4 = 39
2 + 4 + 8 + 6 + 3 + 7 + 9 + 8 = 47
10+9+15+8+4+6+11=63
9 + 8 + 7 + 6 + 5 + 4 + 3 = 42
89
1 + 6 + 9 - 8 + 4 - 5 + 2 + 3 = -6
1+2+3+4+5+6+7+8+9=37
1+2+3+4+5+6+7+8+9= 45 :)
4 plus 5 plus 6 plus 7 plus 8 equals 30. To find the total, you simply add the numbers together: 4 + 5 = 9, 9 + 6 = 15, 15 + 7 = 22, and 22 + 8 = 30.