Key Features :
i : Students see the inverse relationship between addition and subtraction when using number bonds. Knowledge of number bonds is essential when it comes to harder calculations involving addition and subtraction.ii : Dry erase boards offer a practical solution for students to practice number bonds at school or home.iii : These dry erase boards can be used in a variety of mathematical and verbal activities.iv : High quality, double-sided dry erase boards have rounded corners and edges for safety.