Theme 1.  Oral and written numbering of numbers from 21 to 100. Comparing numbers up to 100

In the theme you learn:
• You will learn how numbers of the second ten are made;
• You will learn to find the order of numbers in the first hundred;
• You will practice counting by tens up to 100;
• You will choose the next and neighbor numbers up to 100;
• You will learn to compare numbers in the first hundred;
• You will solve problems to find the sum and to decrease a number by a few units;
• You will improve your skills in adding and subtracting one-digit numbers with crossing the tens up to 20, breaking numbers into easy addends.