The key to solving this puzzle lies in the addition skills of young learners. The first step is to answer a series of decimal addition problems organized in a 4x5 grid. Then cut apart the page of puzzle pieces, each one including an answer to one of the math problems, and match the pieces up to the corresponding question. Finally, glue down the puzzle pieces and color in the final picture. A great supplemental activity to provide early finishers during math lessons the week of Earth Day.