Theme 7.  Addition and subtraction of the number 4

In the theme you learn:
• You will learn how to add and subtract the number 4 using a number line;
• You will practice calculating expressions with adding and subtracting the number 4;
• You will improve your skills in making short notes and solving problems to find the sum, to increase or decrease a number by a few units;
• You will find unknown parts and the result of addition and subtraction.