Theme 2.  Adding and subtracting the number 1

In the theme you learn:
• You will learn how to add and subtract the number 1 using a number line;
• You will practice calculating expressions with adding and subtracting 1 and 0;
• You will find the previous and next number for numbers from 1 to 10;
• You will learn to write a short note and solve problems to find the sum and the difference.