Ask a five-year-old what goes with three to make five, and you will often see fingers come up before any answer. That pause is the heart of this kindergarten missing addend worksheet. A puzzled cartoon face sits next to the example, 2 + 2 = 4, with the first 2 written in pink, while below it six colored boxes each hide one number. The blank moves around, sometimes first and sometimes second, but every total in these six sums stays at 5 or less. The PDF has two pages: the worksheet and its answer key.