Associative
5 + (8 + 14) = (5 + 8)+ 14
What I notice

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Given: △acm, m∠c=90°, cp ⊥ am , ac: cm=3: 4, mp-ap=1. find am.

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?