Yolanda had 9 cookies in a jar. She then bought 6 bags of 13 cookies each. How many cookies does she

[math_celebrity]

Yolanda had 9 cookies in a jar. She then bought 6 bags of 13 cookies each. How many cookies does she have now?

6 bags * 13 cookies each = 78 cookies.
78 cookies added to the original 9 in the jar = 87 cookies.