Math Puzzle with Dinosaurs — Grade 2

Rebuild the picture by solving the math! On this Grade 2 worksheet a picture of dinosaurs 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.

By second grade, a child works with two-digit numbers — adding and subtracting within 100, sometimes regrouping tens and ones. This puzzle of dinosaurs builds exactly that: each piece is a within-100 problem, and solving it advances the picture. Practising numbers to 100 this way keeps the two-digit arithmetic concrete, with a visible reward for every correct answer.

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 feelings, or try math puzzle with insects and bugs. 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.