What you read below is true and follows a pattern:
7 + 7 = 2 8 + 8 = 4 8 + 5 = 1 6 + 9 = 3 10 + 11 = 9
Can you analyze the pattern and find out the answer for: 4 + 9 = ?
4+9=13 13-2=11 Last digit 1 So 1
4 = -2 , 5 = -1, ..., 9=3, ... 4+9 = -2+3 = 1.
Try these calculations: 1 x 9 + 2 = , 12 x 9 + 3 = , 123 x 9 + 4 =, ... continue the pattern and see if you can predict the answers before calculating.
