Jack has 5 more apples than Jill. Jill has 3 apples. How many apples in total do they have?

I'll stick with the "O" for apples.

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Jill has 3 apples: O O O = 3

Jack has 5 MORE apples than Jill
So Jack has the same amount as Jill PLUS 5

Jack has 8 apples: O O O + O O O O O = 8

How many apples in TOTAL do they have?

Jack has 8 apples and Jill has 3.
8 + 3 = 11

They have 11 apples in total