Math Puzzle with Ocean Life — Grade 2

Rebuild the picture by solving the math! On this Grade 2 worksheet a picture of sea creatures is split into puzzle pieces, each labelled with a within-100 addition or subtraction. The child works each two-digit problem and places the piece. That numbers-to-100 practice — adding and subtracting within 100, the core of 2nd-grade base ten — drives the whole puzzle, and the finished picture proves the arithmetic is done.

Second graders practise adding and subtracting within 100 — two-digit problems that build on earlier number facts. This puzzle turns that practice into picture-building: each piece of a sea creatures picture carries a within-100 equation. Solving the two-digit problems to complete the picture keeps the numbers-to-100 work concrete and motivating, the core of 2nd-grade base ten.

Children enjoy watching the picture come together as they solve each problem, and a finished math puzzle is a satisfying proof of within-100 skill. When this is easy, solve the puzzle in math puzzle with pets, or try math puzzle with tools. You can also browse every Grade 2 math puzzle or the whole second-grade collection — each sheet prints cleanly or plays online for free, and the more within-100 problems a child solves, the surer their two-digit addition and subtraction grows, one solved piece at a time.