Try to win the race by moving your kayak along the number line to the opening in the rocks. Count forwards or backwards on the number line between the kayak and the opening in the rocks. Select the equation which displays the correct operator and matches your count. If you miss the kayak will bounce back and new equation buttons will appear.
Grade 1 » Operations & Algebraic Thinking
Add and subtract within 20: Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).