Theme 3.  Adding and subtracting 2. Comparing an expression and a number

In the theme you learn:
• You will learn how to add and subtract 2 using a number line;
• You will improve your skills in adding and subtracting 1, 2, and 0;
• You will practice finding unknown parts and results of addition and subtraction;
• You will learn to compare an expression and a number;
• You will play the game "Domino".