Beep-boop! Calculo’s little robot helper is trying to count a pile of buttons by pointing its laser at them. But the buttons keep rolling away! There must be a quicker way, like adding groups together. A) The Story of Two Plus Two Makes a Tea Party for Four. B) You have three berries, and you find one more. To find the total, is it quicker to add them up or eat them all? C) Let's use our fingers to solve a tricky number puzzle!