How should you group the following expression to make it easiest to add? 18- 9 4/9+7/9-8

To make it easiest to add, you should group the expression as follows:

(18 - 9) + (4/9 + 7/9) - 8

To make it easiest to add the given expression, you should group it by combining the like terms. Let's break it down step-by-step:

Step 1: Add/Subtract the whole numbers.
18 - 8 = 10

Step 2: Add/Subtract the fractions.
4/9 + 7/9 = 11/9

Step 3: Combine the whole number and the fraction.
10 + 11/9

Therefore, the grouped expression that makes it easiest to add is 10 + 11/9.