Question

2. Find the sum of the digits of each multiple of 9 below.

9.1=9
9.2=18
9.3=27
9-4=36
9.5=45
9.6=54
9.7=63
9-8=72
9.9 81
Sum of digits
9
1+8=9
Describe a pattern. (Do you think it will continue?)

Answer 1

Explanation:

Take the sum of each answer and add the two digits together.
9.2=18 1+8=9

9.3=27 2+7=9

9.4=36. 3+6=9

The sum of the digits added together will always equal 9