Theme 5.  Addition and subtraction based on the decimal structure of a number (40 + 5, 45 – 5)

In the theme you learn:
• You will learn how to add and subtract numbers using the decimal structure of a number;
• You will learn to add and subtract numbers using the decimal structure of a number and practice adding and subtracting one within 100;
• You will practice comparing named numbers written in hryvnias;
• You will solve problems to find change, sum, and to decrease a number by a few units;
• You will improve your skills in converting named numbers written in decimeters and meters.